Braindumps.300-101.

82 Questions
Number: 300-101
Passing Score: 800
Time Limit: 120 min
File Version: 19.2

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300-101
Implementing Cisco IP Routing

Topic 1, Network Principles
Sections
1. Network Principles
2. Layer 2 Technologies
3. Layer 3 Technologies
4. VPN Technologies
5. Infrastructure Security
6. Infrastructure Services

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Exam A
QUESTION 1
Refer to the exhibit.

Based on this FIB table, which statement is correct?
A.
B.
C.
D.

There is no default gateway.
The IP address of the router on FastEthernet is 209.168.201.1.
The gateway of last resort is 192.168.201.1.
The router will listen for all multicast traffic.

Correct Answer: C
Section: Network Principles
Explanation
Explanation/Reference:
Explanation:
The 0.0.0.0/0 route is the default route and is listed as the first CEF entry. Here we see the next hop for this default route lists 192.168.201.1 as the default router
(gateway of last resort).

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QUESTION 2
Refer to the exhibit.

A network administrator checks this adjacency table on a router. What is a possible cause for the incomplete marking?
A.
B.
C.
D.

incomplete ARP information
incorrect ACL
dynamic routing protocol failure
serial link congestion

Correct Answer: A
Section: Network Principles
Explanation
Explanation/Reference:
Explanation:
To display information about the Cisco Express Forwarding adjacency table or the hardware Layer 3-switching adjacency table, use the show adjacency command.
Reasons for Incomplete Adjacencies
There are two known reasons for an incomplete adjacency:
The router cannot use ARP successfully for the next-hop interface. After a clear iparp or a clear adjacency command, the router marks the adjacency as incomplete. Then it fails to clear the entry.
In an MPLS environment, IP CEF should be enabeled for Label Switching. Interface lev- el command ip route-cache cef
No ARP Entry
When CEF cannot locate a valid adjacency for a destination prefix, it punts the packets to the CPU for ARP resolution and, in turn, for completion of the adjacency.
Reference: http://www.cisco.com/c/en/us/support/docs/ip/express-forwarding-cef/17812-cef- incomp.html#t4
QUESTION 3

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Routers on the Internet normally have packet queues. E. B. starvation jitter latency windowing lower throughput Correct Answer: ACE Section: Network Principles Explanation Explanation/Reference: Explanation: www. .wikipedia. steady streams to lose packets simultaneously. C. C. to allow them to hold packets when the network is busy. This causes problems when used on TCP/IP routers handling multiple TCP streams. until there is space in the queue again. and there are no problems except that the full queue results in high latency.org/wiki/TCP_global_synchronization QUESTION 4 Which three problems result from application mixing of UDP and TCP streams within a network with no QoS? (Choose three. Reference: http://en. the size of these queues is also limited.com . rather than discarding them. B. The simplest technique to limit queue size is known as tail drop. especially when bursty traffic is present.A network engineer notices that transmission rates of senders of TCP traffic sharply increase and decrease simultaneously during periods of congestion.Website designed to help IT pros advance their careers. the queue is constantly full.) A. D.vceplus. the introduction of a sudden burst of traffic may cause large numbers of established. D. While the network is stable. Because routers have limited resources. global synchronization tail drop random early detection queue management algorithm Correct Answer: A Section: Network Principles Explanation Explanation/Reference: Explanation: TCP global synchronization in computer networks can happen to TCP/IP flows during periods of congestion because each sender will reduce their transmission rate at the same time when packet loss occurs. However. The queue is allowed to fill to its maximum size. Which condition causes this? A. and then any new packets are simply discarded.

so it offers a very flexible coexistence strategy. Tunneling destinations are manually determined by the IPv4 address in the low-order 32 bits of IPv4-compatible IPv6 addresses. For sessions that support IPv6. . but it is beneficial to be aware of this behavior when making such application-mixing decisions. www. it is not always possible to separate TCP-based flows from UDP-based flows.cisco. B. as WRED (for the most part) only affects TCP-based flows. TCP-starvation/UDP-dominance likely occurs if (TCP-based) mission-critical data is assigned to the same service provider class as (UDP-based) streaming video and the class experiences sustained congestion.htm QUESTION 5 Which method allows IPv4 and IPv6 to work together without requiring both to be used for a single connection during the migration process? A. D. Even if WRED is enabled on the service provider class.cisco. Reference: http://www.vceplus. If both endpoints support IPv4 only. Tunneling is more difficult to configure than dual stack or translation. potentially giving up their bandwidth to drop-oblivious UDP flows. Tunneling is less secure than dual stack or translation. the same behavior would be observed. and applications. D. most UDP transmitters are completely oblivious to drops and thus never lower transmission rates due to dropping. When TCP flows are combined with UDP flows in a single service provider class and the class experiences congestion. dual-stack method 6to4 tunneling GRE tunneling NAT-PT Correct Answer: A Section: Network Principles Explanation Explanation/Reference: Explanation: Dual stack means that devices are able to run IPv4 and IPv6 in parallel. C. Granted. flow control.It is a general best practice not to mix TCP-based traffic with UDP-based traffic (especially streaming video) within a single service provider class due to the behaviors of these protocols during periods of congestion. then IPv4 is used. TCP transmitters will throttle-back flows when drops have been detected. B. This can increase latency and lower the overall throughput. It allows hosts to simultaneously reach IPv4 and IPv6 content. C. Reference: http://www.com/warp/public/cc/so/neso/vpn/vpnsp/spqsd_wp. Benefits: · Native dual stack does not require any tunneling mechanisms on internal networks · Both IPv4 and IPv6 run independent of each other · Dual stack supports gradual migration of endpoints.com . and retransmission capabilities. networks.Website designed to help IT pros advance their careers.pdf QUESTION 6 Which statement about the use of tunneling to migrate to IPv6 is true? A. Tunneling does not enable users of the new protocol to communicate with users of the old protocol without dual-stack hosts. Specifically. This effect is called TCP-starvation/ UDP-dominance. then TCP flows will continually lower their rates.com/web/strategy/docs/gov/IPV6at_a_glance_c45625859. Although some UDP applications have application-level windowing. IPv6 is used on a dual stack endpoint.

Which two tables does this command clear and rebuild? (Choose two. D.html QUESTION 7 A network administrator executes the command clear ip route.solution/white_paper_c11-676278.Correct Answer: C Section: Network Principles Explanation Explanation/Reference: Explanation: Using the tunneling option. which negates interoperability. The advantage of this approach is that the new protocol can work without disturbing the old protocol. * www. use the following commands in any mode: Command Purpose clear iproute {* | Clears one or more routes from both the unicast RIB and all the module FIBs. F. The {route | route options are as follows: prefix/length}[nexthopinterface]} · --All routes. as discussed in RFC 6144: · Users of the new architecture cannot use the services of the underlying infrastructure. . · Tunneling does not enable users of the new protocol to communicate with users of the old protocol without dual-stack hosts. Tunneling has two disadvantages. C.vceplus.) A.com .cisco. B. Reference: http://www.Website designed to help IT pros advance their careers. IP routing FIB ARP cache MAC address table Cisco Express Forwarding table topology table Correct Answer: AB Section: Network Principles Explanation Explanation/Reference: Explanation: To clear one or more entries in the IP routing table. E.com/c/en/us/products/collateral/ios-nx-os-software/ enterprise-ipv6. thus providing connectivity between users of the new protocol. organizations build an overlay network that tunnels one protocol over the other by encapsulating IPv6 packets within IPv4 packets and IPv4 packets within IPv6 packets.

Fast switching is enabled by default on all interfaces that support fast switching.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/unicast/5_0_3_N1_1/Ci sco_n5k_layer3_ucast_cfg_rel_503_N1_1/l3_manage-routes. prefix/length 10. Reference: http://www.html QUESTION 8 Which switching method is used when entries are present in the output of the command show ip cache? A. C.com . To display the routing table cache used to fast switch IP traffic.Website designed to help IT pros advance their careers.vceplus.2.2. fast switching process switching Cisco Express Forwarding switching cut-through packet switching Correct Answer: A Section: Network Principles Explanation Explanation/Reference: Explanation: Fast switching allows higher throughput by switching a packet using a cache created by the initial packet sent to a particular destination. route switch(config)# clear iproute · --Any IP prefix.com/c/en/us/td/docs/ios/12_2/switch/command/reference/fswtch_r/xrfscmd5.cisco. Routers offer better packet-transfer performance when fast switching is enabled. D. . alphanumeric string up to 32 characters.[vrfvrf-name] Example: · --An individual IP route. Destination addresses are stored in the high-speed cache to expedite forwarding. B. use the show ip cache EXEC command. Reference: http://www.2 · --The next-hop address next-hop · --The interface to reach the interface next-hop address.ht ml#wp1038133 www.cisco. The vrf-name can be any case-sensitive.

B. C. Correct Answer: AB Section: Network Principles Explanation Explanation/Reference: Explanation: The TCP Window Scaling feature adds support for the Window Scaling option in RFC 1323. F. . The larger scalable window size will allow TCP to perform better over LFNs.cisco.vceplus. Execute the command iptcp adjust-mss.com . Execute the command iptcp window-size 65536. Typical applications use a scale factor of 3 when deployed in LFNs. TCP Extensions for High Performance . The TCP Window Scaling enhancement provides that support. The TCP Window Scaling feature complies with RFC 1323. The window scaling extension in Cisco IOS software expands the definition of the TCP window to 32 bits and then uses a scale factor to carry this 32-bit value in the 16-bit window field of the TCP header. Execute the command iptcpqueuemax.) A.Website designed to help IT pros advance their careers. D. the remote host must also support this feature and its window size must be increased. In order for this to work.QUESTION 9 Which two actions must you perform to enable and use window scaling on a router? (Choose two.) A. D. A larger window size is recommended to improve TCP performance in network paths with large bandwidth-delay product characteristics that are called Long Fat Networks (LFNs). E. E. Set window scaling to be used on the remote host. C. header compression explicit congestion notification keepalive time stamps TCP path discovery MTU window Correct Answer: BCD Section: Network Principles Explanation www. B.html#GUID-BD998AC6F128-47DD-B5F7-B226546D4B08 QUESTION 10 Which three TCP enhancements can be used with TCP selective acknowledgments? (Choose three.com/c/en/us/td/docs/ios-xml/ios/ipapp/configuration/12-4t/iap-12.4t-book/iap-tcp. Set TCP options to "enabled" on the remote host. Reference: http://www. The window size can increase to a scale factor of 14. Use the iptcp window-size command in global configuration mode to configure the TCP window size.

and 8. D. informing the sender of data that has been received.com/c/en/us/td/docs/ios-xml/ios/ipapp/configuration/xe. Which UDP characteristic does this scenario describe? A. The benefit of this feature is the reduction of delay and packet loss in data transmissions. Use the iptcp selective-ack command in global configuration mode to enable TCP selective acknowledgment. but such re-sent segments might have already been successfully received. . the receiver can acknowledge packets received out of order.F2E48FFEEA01 QUESTION 11 A network administrator uses IP SLA to measure UDP performance and notices that packets on one router have a higher one-way delay compared to the opposite direction. Because the time stamps are always sent and echoed in both directions and the time-stamp value in the header is always changing. Prior to this feature. In other words. 3. An aggressive sender could choose to resend packets early. The receiving TCP host returns selective acknowledgment packets to the sender. such as Telnet. B. the connection is considered dead and the device initiating the probes frees resources used by the TCP connection. TCP Time Stamp The TCP time-stamp option provides improved TCP round-trip time measurements.com .3s/asr1000/iap-xe-3s-asr1000-book/iap-tcp. TCP receives acknowledgment of packets 1.Website designed to help IT pros advance their careers. because of limited information available from cumulative acknowledgments. and transfer of audio and video data that are sensitive to delay or packet loss. To allow TCP header compression over a serial link. Prior to selective acknowledgment. a TCP sender could learn about only one lost packet per-round-trip time. Refer to RFC 2018 for more details about TCP selective acknowledgment. and 3. The sender can then resend only missing data segments (instead of everything since the first missing packet). 2. TCP selective acknowledgment is used only when multiple packets are dropped within one TCP window. Reference: http://www. The TCP selective acknowledgment mechanism helps improve performance. C. It also provides enhanced support for TCP sessions associated with applications. TCP Explicit Congestion Notification The TCP Explicit Congestion Notification (ECN) feature allows an intermediate router to notify end hosts of impending network congestion. With selective acknowledgment. If a response packet (a TCP ACK packet) is not received after the device sends a specific number of probes. Use the iptcp timestamp command to enable the TCP time-stamp option. Use the iptcpecn command in global configuration mode to enable TCP ECN. There is no performance impact when the feature is enabled but not used. When a TCP connection on a routing device is idle for too long.cisco. latency starvation connectionless communication nonsequencing unordered packets jitter www. 2. web browsing.html#GUID-22A82C5F-631F-43909838. the TCP time-stamp option is disabled. TCP would receive acknowledgment of only packets 1. 5. if TCP lost packets 4 and 7 out of an 8-packet window. E. TCP header compression will not compress the outgoing packet. the device sends a TCP keepalive packet to the peer with only the Acknowledgment (ACK) flag turned on. Only packets 4 and 7 must be re-sent.vceplus.Explanation/Reference: Explanation: TCP Selective Acknowledgment The TCP Selective Acknowledgment feature improves performance if multiple packets are lost from one TCP window of data. TCP Keepalive Timer The TCP Keepalive Timer feature provides a mechanism to identify dead connections. Packets 4 through 8 would need to be re-sent. 6.

Cisco IOS IP SLAs generates an SNMP trap to alert management applications if this threshold is crossed. and retransmission capabilities. Specifically. when TCP traffic is in the same class as UDP when UDP flows are assigned a lower priority queue when WRED is enabled when ACLs are in place to block TCP traffic Correct Answer: A Section: Network Principles Explanation Explanation/Reference: Explanation: Mixing TCP with UDP It is a general best practice to not mix TCP-based traffic with UDP-based traffic (especially Streaming-Video) within a single service-provider class because of the behaviors of these protocols during periods of congestion. When TCP flows are combined with UDP flows within a single service-provider class and the class experiences congestion. MOS.com . packet loss. jitter. .845 UTC Thu Feb 3 2005 Latest operation return code: OK RTT Values: Number Of RTT: 10 RTT Min/Avg/Max: 1/1/1 milliseconds Latency one-way time: Number of Latency one-way Samples: 0 Source to Destination Latency one way Min/Avg/Max: 0/0/0 milliseconds Destination to Source Latency one way Min/Avg/Max: 0/0/0 milliseconds Reference: http://www.html QUESTION 12 Under which condition does UDP dominance occur? A.cisco. one-way latency. Although some UDP applications have application-level windowing.Correct Answer: A Section: Network Principles Explanation Explanation/Reference: Explanation: Cisco IOS IP SLAs provides a proactive notification feature with an SNMP trap. TCP transmitters throttle back flows when drops are detected. flow control.com/en/US/technologies/tk648/tk362/tk920/technologies_white_paper09186a0 0802d5efe. and connectivity tests. average jitter.vceplus. Several SNMP traps are available: round trip time. B. potentially giving up their bandwidth to UDP flows that are oblivious to drops. never lower transmission rates because of dropping. Each measurement operation can monitor against a pre-set performance threshold. Here is a partial sample output from the IP SLA statistics that can be seen: router#showipsla statistics 1 Round Trip Time (RTT) for Index 55 Latest RTT: 1 ms Latest operation start time: *23:43:31. C. thus.Website designed to help IT pros advance their careers. D. most UDP transmitters are completely oblivious to drops and. TCP flows continually lower their transmission rates. This www.

vceplus. B. Layer 2 Technologies QUESTION 13 Prior to enabling PPPoE in a virtual private dialup network group. vpdn enable 4. www. protocolpppoe DETAILED STEPS Command or Action Purpose Step 1 enable Enables privileged EXEC mode. D.cisco. Reference: http://www. · Example: Enter your password if Router> enable prompted.com .2(13)T. TCP starvation/UDP dominance likely occurs if (TCP-based) Mission-Critical Data is assigned to the same service-provider class as (UDP-based) Streaming-Video and the class experiences sustained congestion. Disable CDP on the interface. enable 2.com/c/en/us/td/docs/solutions/Enterprise/WAN_and_MAN/QoS_SRND/QoS. the same behavior would be observed because WRED (for the most part) manages congestion only on TCP-based flows. Restrictions This task applies only to releases prior to Cisco IOS Release 12. configureterminal 3. Execute the vpdn enable command. .Website designed to help IT pros advance their careers. request-dialin 6. Enable QoS FIFO for PPPoE support. C. Even if WRED is enabled on the service-provider class.html Topic 2.effect is called TCP starvation/UDP dominance. which task must be completed? A. SUMMARY STEPS 1. Execute the no switchport command.SRND-Book/VPNQoS. Correct Answer: B Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: Enabling PPPoE in a VPDN Group Perform this task to enable PPPoE in a virtual private dial-up network (VPDN) group. vpdn-groupname 5.

Website designed to help IT pros advance their careers. B. PAP dot1x IPsec CHAP ESP Correct Answer: D Section: Layer 2 Technologies Explanation Explanation/Reference: www. Router(config)# vpdn-group group1 Step 5 request-dialin Creates a request-dialin VPDN Example: subgroup. in combination with PPPoE. Which technology. D.vceplus.com .html QUESTION 14 A network engineer has been asked to ensure that the PPPoE connection is established and authenticated using an encrypted password.com/en/US/docs/ios/12_2t/12_2t2/feature/guide/ftpppoec_support_TSD_Island _of_Content_Chapter. E.cisco. Router(config)# vpdn enable Step 4 vpdn-groupname Associates a VPDN group with a Example: customer or VPDN profile. can be used for authentication in this manner? A. Example: Router# configure terminal Step 3 vpdn enable Enables virtual private dialup Example: networking.Step 2 configureterminal Enters global configuration mode. . Router(config-vpdn)# requestdialin Step 6 protocol pppoe Enables the VPDN subgroup to Example: establish PPPoE Router(config-vpdn-reqin)# protocol pppoe Reference: http://www. C.

or you can set a custom timer interval. When the access server receives the response. The benefit of using CHAP authentication is that the remote device's password is never transmitted in clear text (encrypted). The retrieved password should be the same password the remote device used in its encryption process. The CHAP packet requests or "challenges" the remote device to respond. D. .com/c/en/us/td/docs/ios/12_2/security/configuration/guide/fsecur_c/scfathen. even if no interesting traffic exists. B. C. dialer persistent. The command provides a default timer interval. This prevents other devices from stealing it and gaining illegal access to the ISP's network. The challenge packet consists of an ID. it concatenates the ID. and then encrypts all of it using the remote device's password. and the host name of the local router. the dialer persistent command starts a timer when the dialer interface starts up and starts the connection when the timer expires.com . When the remote device receives the challenge packet. along with the name associated with the password used in the encryption process. Step 2 Router(config-if)# ip Specifies the IP address and mask addressaddress mask of the dialer interface as a node in the destination network to be www.Explanation: With PPPoE.Website designed to help IT pros advance their careers.cisco.vceplus. If interesting traffic arrives before the timer expires. When configured. E. it uses the name it received to retrieve a password stored in its user database. the access server sends a CHAP packet to the remote device. The access server then encrypts the concatenated information with the newly retrieved password--if the result matches the result sent in the response packet. Which feature can be used to accomplish this task? A. To configure a dialer interface as persistent. use the following commands beginning in global configuration mode: Command Purpose Step 1 Router(config)# interface dialer Creates a dialer interface and number enters interface configuration mode. Reference: http://www. and the random number.ht ml QUESTION 15 A corporate policy requires PPPoE to be enabled and to maintain a connection with the ISP. The remote device sends the results back to the access server. authentication succeeds. the remote device's password. a random number. TCP Adjust Dialer Persistent PPPoE Groups half-bridging Peer Neighbor Route Correct Answer: B Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: A new interface configuration command. the two authentication options are PAP and CHAP. When CHAP is enabled on an interface and a remote device attempts to connect to it. allows a dial-on-demand routing (DDR) dialer profile connection to be brought up without being triggered by interesting traffic. the connection is still brought up and set as persistent.

Step 6 Router(config-if)# dialer. C.cisco.number or by protocol and list name{permit | deny | list accessnumber to define the interesting list-number} packets that can trigger a call.Assigns the dialer interface to a groupgroup-number dialer group. B. MS CHAP CDPCP CHAP PAP Correct Answer: D Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: PAP authentication involves a two-way handshake where the username and password are sent across the link in clear text.vceplus. Reference: http://www. even in | max-attemptsnumber] the absence of interesting traffic. Step 5 Router(config-if)# dialer pool Specifies the dialing pool to use number for calls to this destination. D. . Step 3 Router(config-if)# encapsulation Specifies the encapsulation type.Website designed to help IT pros advance their careers. type Step 4 Router(config-if)# dialer string Specifies the remote destination dial-string class class-name to call and the map class that defines characteristics for calls to this destination. PAP authentication does not www. Step 7 Router(config-if)# dialer-list Specifies an access list by list dialer-group protocol protocol. Step 9 Router(config-if)# dialer Forces a dialer interface to be persistent [delay [initial] seconds connected at all times.com/c/en/us/td/docs/ios/dial/configuration/guide/12_4t/dia_12_4t_book/dia_dia ler_persist.(Optional) Specifies the name user-name authentication name of the remote router on the destination subnetwork for a dialer interface. hence. Step 8 Router(config-if)# dialer remote.html QUESTION 16 Which PPP authentication method sends authentication information in cleartext? A.called.com .

B. After the PPP link is established. B. D. . If the values match. The host checks the response against its own calculation of the expected hash value. given its known DLCI. the table is then used to supply the next-hop protocol address or the DLCI for outgoing traffic. the host sends a "challenge" message to the remote node. otherwise.provide any protection against playback and line sniffing. Reference: http://www. the connection is terminated. The remote node responds with a value calculated using a one-way hash function. the authentication is acknowledged.Website designed to help IT pros advance their careers. C. D.ppp-callin-hostname. Frame Relay inverse ARP static DLCI mapping Frame Relay broadcast queue dynamic DLCI mapping Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: Dynamic address mapping uses Frame Relay Inverse ARP to request the next-hop protocol address for a specific connection.html QUESTION 17 Which protocol uses dynamic address mapping to request the next-hop protocol address for a specific connection? A. 10 20 30 40 Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: www. Reference: http://www. CHAP authentication. periodically verifies the identity of the remote node using a three-way handshake.vceplus. Responses to Inverse ARP requests are entered in an address-to-DLCI mapping table on the router or access server.cisco. C.com/c/en/us/td/docs/ios/12_2/wan/configuration/guide/fwan_c/wcffrely. on the other hand.cisco.com/c/en/us/support/docs/wan/point-to-point-protocol-ppp/10241.html QUESTION 18 What is the default OSPF hello interval on a Frame Relay point-to-point network? A.com .

com/c/en/us/support/docs/ip/open-shortest-path-first-ospf/13693. allowing data to be transferred over the PPP link within PPPoE headers. C.com/c/en/us/td/docs/security/asa/ www. During this phase.Before you troubleshoot any OSPF neighbor-related issues on an NBMA network. it is important to remember that an NBMA network can be configured in these modes of operation with the ipospf network command: Point-to-Point Point-to-Multipoint Broadcast NBMA The Hello and Dead Intervals of each mode are described in this table: Hello Interval Dead Interval Network Type (secs) (secs) Point-to-Point 10 40 Point-to-Multipoint 30 120 Broadcast 10 40 Non-Broadcast 30 120 Reference: http://www. B. Active Authentication Phase and PPP Session Phase Passive Discovery Phase and PPP Session Phase Active Authorization Phase and PPP Session Phase Active Discovery Phase and PPP Session Phase Correct Answer: D Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: PPPoE is composed of two main phases: Active Discovery Phase--In this phase. . PPP Session Phase--In this phase. Once the link setup is completed. Reference: http://www. the PPPoE client locates a PPPoE server.cisco. a Session ID is assigned and the PPPoE layer is established. PPP options are negotiated and authentication is performed.22. PPPoE functions as a Layer 2 encapsulation method. D.vceplus.Website designed to help IT pros advance their careers.html QUESTION 19 PPPoE is composed of which two phases? A. called an access concentrator.cisco.com .

vceplus. B.cli/vpn-pppoe. PPP options are negotiated and authentication is performed. Reference: http://www. .cisco. a Session ID is assigned and the PPPoE layer is established.asa92/configuration/vpn/asa-vpn. PPP Session Phase--In this phase. Once the link setup is completed. PPP options are not negotiated and authentication is performed. During this phase. Once the link setup is completed. D.html Topic 3. PPP options are automatically enabled and authorization is performed. PPPoE functions as a Layer 3 encapsulation method that allows data to be transferred over the PPP link within PPPoE headers. PPPoE functions as a Layer 4 encapsulation method that allows data to be transferred over the PPP link within PPPoE headers. PPPoE functions as a Layer 2 encapsulation method that allows data to be encrypted over the PPP link within PPPoE headers. PPP options are negotiated and authentication is performed. Once the link setup is completed. www.Website designed to help IT pros advance their careers.cli/vpn-pppoe.com/c/en/us/td/docs/security/asa/asa92/configuration/vpn/asa-vpn. allowing data to be transferred over the PPP link within PPPoE headers. Correct Answer: D Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: PPPoE is composed of two main phases: Active Discovery Phase--In this phase. PPPoE functions as a Layer 2 encapsulation method. Once the link setup is completed. Once the link setup is completed.html QUESTION 20 Which statement is true about the PPP Session Phase of PPPoE? A. PPP options are negotiated and authentication is not performed. the PPPoE client locates a PPPoE server. PPPoE functions as a Layer 2 encapsulation method that allows data to be transferred over the PPP link within PPPoE headers. Layer 3 Technologies QUESTION 21 Refer to the exhibit.com . C. called an access concentrator.

If you filter inbound.0. Which message is required to obtain a global www.0.0/16 route and therefore won't send it to anyone else downstream.0.0.0.0. D.0. If you filter outbound. C.5.5.0/8 network because it is blocked by the ACL.16. The 10.0.0/8 network.0.0/8 network can successfully ping users on the 192. Users on the 10.0.16.0/24 network.0/8 network will not be in the routing table on Router B.0.0. the next neighbor(s) will not know about anything except the 172.vceplus. .0/8 network is missing from Router B. Traffic from the 172.0/8 network will not be advertised by Router B because the network statement for the 10. YOU won't know about the route and therefore won't send it to anyone else downstream. One example is noted above. but users on the 192. Correct Answer: E Section: Layer 3 Technologies Explanation Explanation/Reference: Explanation: You can filter what individual routes are sent (out) or received (in) to any interface within your EIGRP configuration. E.com . The 10. B.168.Website designed to help IT pros advance their careers.168. QUESTION 22 A router with an interface that is configured with ipv6 address autoconfig also has a link-local address assigned.0.0.0/24 cannot successfully ping users on the 10.0/16 network will be blocked by the ACL.Which one statement is true? A. Router B will not advertise the 10.

Hence. the Router Advertisements notify what sort of configurations the hosts need to do and the hosts receive a global unicast IPv6 address.unicast address when a router is present? A. 2001:DB8:0:1:C601:42FF:FE0F:7 B. If no routers are present. If a node responds with a Neighbor Advertisement message with tentative address as the target address. The autoconfiguration on the routers stop at this stage.420F.com . It is formed by appending the interface identifier to wellknown link-local prefix FE80 :: 0.enabled interface is enabled (during system startup or manually). a stateful configuration is required.vceplus. manual configuration is required.Website designed to help IT pros advance their careers. The routers will need manual configuration (or stateful configuration) to receive site-local or global addresses. it has IP-connectivity to other neighbors on this link.google. At this stage. . Before the link-local address can be assigned to the interface.0007 subnet 2001:DB8:0:1::/64 Which IPv6 addresses should the engineer add to the documentation? A. The interface identifier replaces the right-most zeroes of the link-local prefix. Nodes (both. it assigns that link-local address to the interface. Reference: https://sites. the node performs the Duplicate Address Detection mechanism to see if any other node is using the same link-local address on the link. and was asked to document the IPv6 address of the router. B. The next phase involves obtaining Router Advertisements from routers if any routers are present on the link. 2001:DB8:0:1:FFFF:C601:420F:7 C. If routers are present. C. 2001:DB8:0:1:FE80:C601:420F:7 www. It does this by sending a Neighbor Solicitation message with target address as the "tentative" address and destination address as the solicited-node multicast address corresponding to this tentative address.autoconfiguration QUESTION 23 An engineer has configured a router to use EUI-64. DHCPv6 request router-advertisement neighbor-solicitation redirect Correct Answer: B Section: Layer 3 Technologies Explanation Explanation/Reference: Explanation: Autoconfiguration is performed on multicast-enabled links only and begins when a multicast. D. further tasks are performed only by the hosts. The router has the following interface parameters: mac address C601. Once the node verifies that its tentative address is unique on the link.com/site/amitsciscozone/home/important-tips/ipv6/ipv6-stateless. the address is a duplicate address and must not be used. hosts and routers) begin the process by generating a link-local address for the interface.

Here is an example showing how the Mac Address is used to generate EUI. allows a host to assign iteslf a unique 64-Bit IP Version 6 interface identifier (EUI-64). The 16bit 0xFFFE is then inserted between these two 24-bits to for the 64-bit EUI address.5. the seventh bit from the left. 2001:DB8:0:1:C601:42FE:800F:7 Correct Answer: A Section: Layer 3 Technologies Explanation Explanation/Reference: Explanation: Extended Unique Identifier (EUI).D. Next. Therefore. The traffic filter is blocking all ICMPv6 traffic.com/document/100566/understanding-ipv6-eui-64-bit. when the bit is inverted.address QUESTION 24 For security purposes. The reason for inverting can be found in RFC4291 section 2. However. It is worth noticing that in the OUI portion. the address is locally administered and if 1. as per RFC2373.vceplus. www. an IPv6 traffic filter was configured under various interfaces on the local router. . with one being OUI (Organizationally Unique Identifier) and the other being NIC specific.cisco. the globally unique addresses assigned by the IEEE has always been set to 0 whereas the locally created addresses has 1 configured.com . The IPv6 EUI-64 format address is obtained through the 48-bit MAC address. What caused this issue? A. OSPFv3 neighbor adjacencies were lost. it maintains its original scope (global unique address is still global unique and vice versa). or the universal/local (U/L) bit. The Mac address is first separated into two 24-bits. shortly after implementing the traffic filter.Website designed to help IT pros advance their careers. If 0. This bit identifies whether this interface identifier is universally or locally administered. needs to be inverted. the address is globally unique. Reference: https:// supportforums.1. IEEE has chosen FFFE as a reserved value which can only appear in EUI-64 generated from the EUI-48 MAC address. This feature is a key benefit over IPv4 as it eliminates the need of manual configuration or DHCP as in the world of IPv4.

use the autonomous-system command in address-family configuration mode. It sets the global EIGRP autonomous system number. . The global anycast address must be added to the traffic filter to allow OSPFv3 to work properly. Correct Answer: A Section: Layer 3 Technologies Explanation Explanation/Reference: Explanation: To configure the autonomous-system number for an Enhanced Interior Gateway Routing Protocol (EIGRP) routing process to run within a VPN routing and forwarding (VRF) instance. C. It sets the EIGRP autonomous system number in a VRF.os/unicast/configuration/guide/l3_cli_nxos/l3_ospfv3. so if any IPv6 traffic filters are implemented be sure to include the link local address so that it is permitted in the filter list. It sets the BGP autonomous system number in a VRF. The link-local addresses that were used by OSPFv3 were explicitly denied.com/c/en/us/td/docs/switches/datacenter/sw/5_x/nx. Correct Answer: C Section: Layer 3 Technologies Explanation Explanation/Reference: Explanation: OSPFv3 uses link-local IPv6 addresses for neighbor discovery and other features. D. discover messages www. which caused the neighbor relationships to fail. IPv6 traffic filtering can be implemented only on SVIs.cisco.Website designed to help IT pros advance their careers. Reference: http://www.html QUESTION 25 What is the purpose of the autonomous-system {autonomous-system-number} command? A. To remove the autonomous-system for an EIGRP routing process from within a VPN VRF instance. C. D.vceplus.com/c/en/us/td/docs/ios/iproute_eigrp/command/reference/ire_book/ire_a1. autonomous-systemautonomous-system-number no autonomous-systemautonomous-system-number Reference: http://www.B.cisco. It sets the global BGP autonomous system number. B. use the no form of this command.htm l#wp1062796 QUESTION 26 Which type of traffic does DHCP snooping drop? A.com .

This check is performed only if the DHCP snooping MAC address verification option is turned on. The switch forwards the DHCP packet unless any of the following conditions occur (in which case the packet is dropped): · The switch receives a packet (such as a DHCPOFFER. · The switch receives a packet on an untrusted interface. DHCP messages where the destination MAC and client MAC do not match Correct Answer: B Section: Layer 3 Technologies Explanation Explanation/Reference: Explanation: The switch validates DHCP packets received on the untrusted interfaces of VLANs with DHCP snooping enabled.com . . and the interface information in the binding table does not match the interface on which the message was received. DHCPACK.2.vceplus. traffic from a trusted DHCP server to client D. or DHCPLEASEQUERY packet) from a DHCP server outside the network or firewall. you can enable the DHCP option-82 on untrusted port feature.cisco.3.0. Which command only announces the 1. DHCPNAK.0.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12.2SX/configuration/guide/book/snoodhcp.0. Reference: http:// www. · The switch receives a DHCPRELEASE or DHCPDECLINE message from an untrusted host with an entry in the DHCP snooping binding table. To support trusted edge switches that are connected to untrusted aggregation-switch ports. which enables untrusted aggregation. · The switch receives a DHCP packet that includes a relay agent IP address that is not 0.switch ports to accept DHCP packets that include option-82 information. DHCP messages where the source MAC and client MAC do not match C.B.html QUESTION 27 Refer to the exhibit. Configure the port on the edge switch that connects to the aggregation switch as a trusted port. and the source MAC address and the DHCP client hardware address do not match.0/24 network out of FastEthernet 0/0? www.Website designed to help IT pros advance their careers.

8. C.0. QUESTION 28 Which prefix is matched by the command ip prefix-list name permit 10.0.0/24 10.A. The networks that are advertised from Router A do not show up in Router B's routing table.0/24 10. distribute list 1 out distribute list 1 out FastEthernet0/0 distribute list 2 out distribute list 2 out FastEthernet0/0 Correct Answer: D Section: Layer 3 Technologies Explanation Explanation/Reference: Explanation: Access list 2 is more specific. This translate to any prefix in the 10. B.0. Only the choice of 10. C. OSPFv3 timers were adjusted for fast convergence. QUESTION 29 Router A and Router B are configured with IPv6 addressing and basic routing capabilities using OSPFv3. the ge 24 term means greater than or equal to a /24 and the le 24 means less than or equal to /24.9.0.Website designed to help IT pros advance their careers.8. After debugging IPv6 packets.24 matches this.8. www.0/16 10.0/24.8.0/23 Correct Answer: B Section: Layer 3 Technologies Explanation Explanation/Reference: Explanation: With prefix lists. D.0. B.x. the message "not a router" is found in the output.8. D. This question also asks us to apply this distribute list only to the outbound direction of the fast Ethernet 0/0 interface.0/8 networks.vceplus. where X is any value in the 0-255 range. so the correct command is distribute list 2 out FastEthernet0/0.0.8.2. 10.3. . Why is the routing information not being learned by Router B? A.0.com . whereas access list 1 permits all 1. allowing only 1.1.0/16 ge 24 le 24? A.0/24 network. so only a /24 is both greater than or equal to 24 and less than or equal to 24.0.

E. The addresses were misconfigured and will not function as intended.vceplus. C. B. IPv6 unicast forwarding was enabled. IPv6 addresses containing "FFFE" indicate that the address is reserved for multicast. The networks were not advertised properly under the OSPFv3 process.B. D. IPv6 unicast routing is not enabled on Router A or Router B.com/c/en/us/td/docs/ios/ipv6/command/reference/ipv6_book/ipv6_16. but IPv6 Cisco Express Forwarding was disabled. format Errors that can result from checks performed on header fields. and packet length. not a Message sent when IPv6 unicast routing is not enabled. Correct Answer: A Section: Layer 3 Technologies www. router Reference: http://www.cisco.Website designed to help IT pros advance their careers. An IPv6 traffic filter is blocking the networks from being learned via the Router B interface that is connected to Router A.com . . IEEE EUI-64 was implemented when assigning IPv6 addresses on the device. Correct Answer: D Section: Layer 3 Technologies Explanation Explanation/Reference: Explanation: show ipv6 traffic Field Descriptions Field Description source. Based on this information. C.html QUESTION 30 After you review the output of the command show ipv6 interface brief.Number of source-routed packets. errors the version number. D. The IPv6 universal/local flag (bit 7) was flipped. what do you conclude about these IPv6 addresses? A. you see that several IPv6 addresses have the 16-bit hexadecimal value of "FFFE" inserted into the address. routed truncated Number of truncated packets.

If 0.Website designed to help IT pros advance their careers. www. Here is an example showing how a the Mac Address is used to generate EUI.5. The reason for inverting can be found in RFC4291 section 2. The IPv6 EUI-64 format address is obtained through the 48-bit MAC address. The 16bit 0xFFFE is then inserted between these two 24-bits to for the 64-bit EUI address. The Mac address is first separated into two 24-bits. IEEE has chosen FFFE as a reserved value which can only appear in EUI-64 generated from the an EUI-48 MAC address. It is worth noticing that in the OUI portion. This feature is a key benefit over IPv4 as it eliminates the need of manual configuration or DHCP as in the world of IPv4.vceplus. the address is locally administered and if 1.Explanation Explanation/Reference: Explanation: Extended Unique Identifier (EUI). Therefore. the seventh bit from the left. with one being OUI (Organizationally Unique Identifier) and the other being NIC specific. needs to be inverted. the globally unique addresses assigned by the IEEE has always been set to 0 whereas the locally created addresses has 1 configured. it maintains its original scope (global unique address is still global unique and vice versa). as per RFC2373. Next. the address is globally unique. This bit identifies whether this interface identifier is universally or locally administered.1. when the bit is inverted. allows a host to assign iteslf a unique 64-Bit IP Version 6 interface identifier (EUI-64). . or the universal/local (U/L) bit.com .

Once the above is done, we have a fully functional EUI-64 format address. Reference: https://supportforums.cisco.com/document/100566/understanding-ipv6-eui64-bit- address
QUESTION 31
A packet capture log indicates that several router solicitation messages were sent from a local host on the IPv6 segment. What is the expected acknowledgment
and its usage?
A. Router acknowledgment messages will be forwarded upstream, where the DHCP server will allocate addresses to the local host.
B. Routers on the IPv6 segment will respond with an advertisement that provides an external path from the local subnet, as well as certain data, such as prefix
discovery.
C. Duplicate Address Detection will determine if any other local host is using the same IPv6 address for communication with the IPv6 routers on the segment.
D. All local host traffic will be redirected to the router with the lowest ICMPv6 signature, which is statically defined by the network administrator.
Correct Answer: B
Section: Layer 3 Technologies
Explanation
Explanation/Reference:
Explanation:
Router Advertisements (RA) are sent in response to router solicitation messages. Router solicitation messages, which have a value of 133 in the Type field of the
ICMP packet header, are sent by hosts at system startup so that the host can immediately autoconfigure without needing to wait for the next scheduled RA
message. Given that router solicitation messages are usually sent by hosts at system startup (the host does not have a configured unicast address), the source
address in router solicitation messages is usually the unspecified IPv6 address (0:0:0:0:0:0:0:0). If the host has a configured unicast address, the unicast address of
the interface sending the router solicitation message is used as the source address in the message. The destination address in router solicitation messages is the

www.vceplus.com - Website designed to help IT pros advance their careers.

all-routers multicast address with a scope of the link. When an RA is sent in response to a router solicitation, the destination address in the RA message is the
unicast address of the source of the router solicitation message. RA messages typically include the following information:
·
One or more onlink IPv6 prefixes that nodes on the local link can use to automatically configure their IPv6 addresses
·
Lifetime information for each prefix included in the advertisement ·
Sets of flags that indicate the type of autoconfiguration (stateless or stateful) that can be completed
·
Default router information (whether the router sending the advertisement should be used as a default router and, if so, the amount of time (in seconds) the router
should be used as a default router)
·
Additional information for hosts, such as the hop limit and MTU a host should use in packets that it originates
Reference:
http://www.cisco.com/c/en/us/td/docs/ios/ipv6/configuration/guide/12_4t/ipv6_12_4t_book/ip6- addrg_bsc_con.html
QUESTION 32
You have been asked to evaluate how EIGRP is functioning in a customer network.

www.vceplus.com - Website designed to help IT pros advance their careers.

www.vceplus.com - Website designed to help IT pros advance their careers.

vceplus.www.Website designed to help IT pros advance their careers. .com .

vceplus. .www.Website designed to help IT pros advance their careers.com .

vceplus.com .www. .Website designed to help IT pros advance their careers.

Website designed to help IT pros advance their careers.www.com .vceplus. .

com .vceplus.Website designed to help IT pros advance their careers.www. .

vceplus. 1:1 1:5 6:8 19:80 www.Website designed to help IT pros advance their careers. What is the ratio of traffic over each path? A. D. . C.com . B.R5-R6 paths.Traffic from R1 to R61 s Loopback address is load shared between R1-R2-R4-R6 and R1-R3.

.Website designed to help IT pros advance their careers.Correct Answer: D Section: Layer 3 Technologies Explanation Explanation/Reference: Explanation: First. find the IP address of the loopback0 interface on R6: www.com .vceplus.

vceplus.com .www. .Website designed to help IT pros advance their careers.

com .1.6 command from R1 and see this: Notice the traffic share count shows 19 for the first path. .vceplus.6.6. and 80 for the second path.6. so we issue the show ip route 150.1. QUESTION 33 You have been asked to evaluate how EIGRP is functioning in a customer network.We see that it is 150.Website designed to help IT pros advance their careers. www.

.vceplus.com .www.Website designed to help IT pros advance their careers.

vceplus.www.Website designed to help IT pros advance their careers.com . .

Website designed to help IT pros advance their careers.vceplus.com .www. .

vceplus. .www.com .Website designed to help IT pros advance their careers.

com .Website designed to help IT pros advance their careers.vceplus.www. .

com .www. .vceplus.Website designed to help IT pros advance their careers.

vceplus. .com .www.Website designed to help IT pros advance their careers.

C. B. .Website designed to help IT pros advance their careers. D.What type of route filtering is occurring on R6 A. Distribute-list using an ACL Distribute-list using a prefix-list Distribute-list using a route-map An ACL using a distance of 255 www.com .vceplus.

com . .vceplus.Website designed to help IT pros advance their careers.Correct Answer: A Section: Layer 3 Technologies Explanation Explanation/Reference: Explanation: The configuration on R6 is as follows: www.

This is a standard distribute list using access list number 1. . www.com .vceplus.Website designed to help IT pros advance their careers.

. www.QUESTION 34 You have been asked to evaluate how EIGRP is functioning in a customer network.Website designed to help IT pros advance their careers.com .vceplus.

Website designed to help IT pros advance their careers.vceplus. .com .www.

vceplus.Website designed to help IT pros advance their careers.com . .www.

.www.com .vceplus.Website designed to help IT pros advance their careers.

www.vceplus.com - Website designed to help IT pros advance their careers.

www.vceplus.com - Website designed to help IT pros advance their careers.

www.vceplus.com - Website designed to help IT pros advance their careers.

C.Which key chain is being used for authentication of EIGRP adjacency between R4 and R2? A. D. CISCO EIGRP key MD5 www. B.vceplus.com .Website designed to help IT pros advance their careers. .

Correct Answer: A Section: Layer 3 Technologies Explanation Explanation/Reference: R4 and R2 configs are as shown below: www.vceplus.Website designed to help IT pros advance their careers.com . .

com .www. .vceplus.Website designed to help IT pros advance their careers.

QUESTION 35 You have been asked to evaluate how EIGRP is functioning in a customer network.Website designed to help IT pros advance their careers.com . . www.vceplus.Clearly we see the actual key chain is named CISCO.

Website designed to help IT pros advance their careers.www. .com .vceplus.

www.vceplus.com . .Website designed to help IT pros advance their careers.

vceplus.Website designed to help IT pros advance their careers.com .www. .

com .vceplus.Website designed to help IT pros advance their careers.www. .

Website designed to help IT pros advance their careers.vceplus.com . .www.

com . .Website designed to help IT pros advance their careers.vceplus.www.

vceplus.com .What is the advertised distance for the 192.46. 333056 1938688 1810944 307456 www. C.0 network on R1? A. .Website designed to help IT pros advance their careers. D.168. B.

Website designed to help IT pros advance their careers.vceplus. .Correct Answer: C Section: Layer 3 Technologies Explanation Explanation/Reference: Explanation: R1`s routing table is as follows www.com .

.com .Website designed to help IT pros advance their careers.vceplus.www.

0 route.46.com .vceplus. QUESTION 36 You have been asked to evaluate how EIGRP is functioning in a customer network. www. which is shows as 1810944 for the 192. .Website designed to help IT pros advance their careers.168.The numbers after the route specify the administrative distance of the route (90 for EIGRP) and the distance metric of that particular route.

com .www.Website designed to help IT pros advance their careers.vceplus. .

vceplus.www. .Website designed to help IT pros advance their careers.com .

Website designed to help IT pros advance their careers.com . .www.vceplus.

vceplus. .Website designed to help IT pros advance their careers.com .www.

www.com .Website designed to help IT pros advance their careers.vceplus. .

www.Website designed to help IT pros advance their careers. .com .vceplus.

Website designed to help IT pros advance their careers.vceplus. C. B. . 10 20 30 40 www.com .What percent of R1`s interfaces bandwidth is EIGRP allowed to use? A. D.

Website designed to help IT pros advance their careers.com .Correct Answer: B Section: Layer 3 Technologies Explanation Explanation/Reference: Explanation: The relevant configuration of R1 is shown below: www. .vceplus.

Website designed to help IT pros advance their careers. .com .www.vceplus.

Website designed to help IT pros advance their careers. The customer has disabled your access to the show running.ip bandwidth-percent eigrp 1 20 1 = the EIGRP AS 20 = 20% of the bandwidth QUESTION 37 Scenario: You have been asked to evaluate an OSPF network setup in a test lab and to answer questions a customer has about its operation.config command. www.com .vceplus. .

Website designed to help IT pros advance their careers.www.vceplus.com . .

.vceplus.www.Website designed to help IT pros advance their careers.com .

com .Website designed to help IT pros advance their careers.vceplus.www. .

vceplus.www.com .Website designed to help IT pros advance their careers. .

www.com .vceplus.Website designed to help IT pros advance their careers. .

com .Website designed to help IT pros advance their careers. .vceplus.www.

com . 1858 1601 600 1569 www. .vceplus. B. D.How old is the Type 4 LSA from Router 3 for area 1 on the router R5 based on the output you have examined? A.Website designed to help IT pros advance their careers. C.

.Website designed to help IT pros advance their careers. The customer has disabled your access to the show running.3. QUESTION 38 Scenario: You have been asked to evaluate an OSPF network setup in a test lab and to answer questions a customer has about its operation.Correct Answer: A Section: Layer 3 Technologies Explanation Explanation/Reference: Explanation: Part of the show ipospf topology command on R5 shows this: The Link ID of R3 (3.config command.3) shows the age is 1858. www.vceplus.com .3.

.www.Website designed to help IT pros advance their careers.vceplus.com .

.www.com .Website designed to help IT pros advance their careers.vceplus.

.vceplus.com .Website designed to help IT pros advance their careers.www.

.com .www.vceplus.Website designed to help IT pros advance their careers.

Website designed to help IT pros advance their careers.vceplus. .com .www.

Website designed to help IT pros advance their careers.vceplus. .com .www.

C. www.Website designed to help IT pros advance their careers.40 R3 is responsible for flooding LSUs to all the routers on the network. . 120 The R1-R3 link OSPF timer values should be 10. B.vceplus.com . 120. D. The R1-R3 link needs the neighbor command for the adjacency to stay up The R2-R3 link OSPF timer values are 30.40.Which of the following statements is true about the serial links that terminate in R3 A.

.com .Website designed to help IT pros advance their careers.Correct Answer: B Section: Layer 3 Technologies Explanation Explanation/Reference: Explanation: We can see the configured timers using the following command: www.vceplus.

vceplus.www.com . .Website designed to help IT pros advance their careers.

The customer has disabled your access to the show running. .config command.com .vceplus.QUESTION 39 Scenario: You have been asked to evaluate an OSPF network setup in a test lab and to answer questions a customer has about its operation. www.Website designed to help IT pros advance their careers.

com . .www.Website designed to help IT pros advance their careers.vceplus.

.Website designed to help IT pros advance their careers.vceplus.com .www.

com .www.Website designed to help IT pros advance their careers.vceplus. .

.www.vceplus.Website designed to help IT pros advance their careers.com .

www.Website designed to help IT pros advance their careers.com .vceplus. .

vceplus.com . .Website designed to help IT pros advance their careers.www.

D. C.Website designed to help IT pros advance their careers.vceplus.com . . E.How many times was SPF algorithm executed on R4 for Area 1? A. B. 1 5 9 20 54 www.

Look for the Area 1 stats which shows this: www.com .Website designed to help IT pros advance their careers. 224 Correct Answer: C Section: Layer 3 Technologies Explanation Explanation/Reference: Explanation: This can be found using the show ipospf command on R4.F.vceplus. .

www. The customer has disabled your access to the show running.Website designed to help IT pros advance their careers.com .QUESTION 40 Scenario: You have been asked to evaluate an OSPF network setup in a test lab and to answer questions a customer has about its operation.vceplus. .config command.

com .Website designed to help IT pros advance their careers.www. .vceplus.

.com .www.Website designed to help IT pros advance their careers.vceplus.

.vceplus.Website designed to help IT pros advance their careers.com .www.

vceplus.Website designed to help IT pros advance their careers. .www.com .

vceplus.www.com .Website designed to help IT pros advance their careers. .

vceplus.www.Website designed to help IT pros advance their careers.com . .

Website designed to help IT pros advance their careers. . C. inspect their routing tables and determine which statement is true? A.Areas of Router 5 and 6 are not normal areas. B.com . R5's Loopback and R6's Loopback are both present in R5's Routing table R5's Loopback and R6's Loopback are both present in R6's Routing table Only R5's loopback is present in R5's Routing table Only R6's loopback is present in R5's Routing table Only R5's loopback is present in R6's Routing table www. E. D.vceplus.

vceplus.Website designed to help IT pros advance their careers.Correct Answer: A Section: Layer 3 Technologies Explanation Explanation/Reference: Explanation: Here are the routing tables of R5 and R6: www. .com .

www.vceplus.com - Website designed to help IT pros advance their careers.

www.vceplus.com - Website designed to help IT pros advance their careers.

www.vceplus.com - Website designed to help IT pros advance their careers.

201.255. www. interface Tunnel0 bandwidth 1536 ip address 209.230 255. The configuration of mGRE on one side of a tunnel does not have any relation to the tunnel properties that might exist at the exit points. interface Tunnel0 bandwidth 1536 ip address 209.255. .255.161.200.x.255.255. Which interface configuration output can be applied to the corporate router to allow communication to the remote sites? A. tunnel interfaces by default are point-to-point (p-p) using GRE encapsulation.165.165.1 tunnel-mode dynamic Correct Answer: A Section: VPN Technologies Explanation Explanation/Reference: Explanation: The configuration of mGRE allows a tunnel to have multiple destinations. which is not seen in the configuration because it is the default. Note.165. The distinguishing feature between an mGRE interface and a p2p GRE interface is the tunnel destination.165.2 tunnel destination 209. effectively they have the tunnel mode gre command.255. interface fa0/0 bandwidth 1536 ip address 209. This means that an mGRE tunnel on the hub may connect to a p2p tunnel on the branch. Instead the GRE tunnel is configured with the command tunnel mode gre multipoint. VPN Technologies QUESTION 41 A company has just opened two remote branch offices that need to be connected to the corporate network.224 tunnel source Serial0/0 tunnel mode gre multipoint B.Website designed to help IT pros advance their careers. This command is used instead of the tunnel destination x.x found with p2p GRE tunnels.231 255.224 tunnel mode gre multipoint C.201.1 tunnel-mode dynamic D.vceplus.165.x.230 255.200.231 255.Topic 4.255. Besides allowing for multiple destinations. An mGRE interface does not have a configured destination.255. an mGRE tunnel requires NHRP to resolve the tunnel endpoints.224 tunnel source 192.com . Conversely.200.200.165.168. a p2p GRE tunnel may connect to an mGRE tunnel.224 tunnel source 209. interface fa 0/0 bandwidth 1536 ip address 209.

interface: FastEthernet0 Crypto map tag: test.2 pathmtu 1500.0/255.1. Authentication Header (AH) is not used since there are no AH SAs.1.0/255.1 local ident (addr/mask/prot/port): (20.2 for traffic that goes between networks 20.1. This output shows an example of the show crypto ipsecsa command (bolded ones found in answers for this question). The encrypted tunnel is built between 12.1.1 and 12.1. #pkts digest 7767918 #pktsdecaps: 7760382. remote crypto endpt. C.cisco. #pktscompr. #pkts encrypt: 7767918.0/0/0) current_peer: 12.com . Which three pieces of information are displayed in the output? (Choose three.2 PERMIT.255. #pkts verify 7760382 #pkts compressed: 0.1.1.: 12.255. D. inbound crypto map remaining key lifetime path MTU tagged packets untagged packets invalid identity packets Correct Answer: ABC Section: VPN Technologies Explanation Explanation/Reference: Explanation: show crypto ipsecsa This command shows IPsec SAs built between peers.255.1. flags={origin_is_acl.1.1.0/0/0) remoteident (addr/mask/prot/port): (10. #pkts decompress failed: 0.1.0 tunnel source Serial0/0 tunnel mode gre multipoint Reference: http://www.1.html QUESTION 42 A network engineer executes the show crypto ipsecsa command.1.com/c/en/us/td/docs/solutions/Enterprise/WAN_and_MAN/DMVPDG/DMVP N_2_Phase2.1.10 255.} #pktsencaps: 7767918. #pkts decrypt: 7760382.) A. . #send errors 1. #pkts decompressed: 0 #pkts not compressed: 0.1. F. You can see the two Encapsulating Security Payload (ESP) SAs built inbound and outbound.1.: 12.1.255.255. failed: 0.The mGRE configuration is as follows: ! interface Tunnel0 bandwidth 1536 ip address 10.1.0 and 10. #recv errors 0 local crypto endpt.1. B.0.vceplus. 12.62. E.1.1.1.255. media mtu 1500 current outbound spi: 3D3 inboundespsas: www.Website designed to help IT pros advance their careers. local addr.

B. It was obtained directly from the next-hop server.1.2. } slot: 0. conn id: 3442.vceplus.spi: 0x136A010F(325714191) transform: esp-3des esp-md5-hmac . NHRP mapping is for networks that are local to this router.2/8 via 10. Correct Answer: A Section: VPN Technologies Explanation Explanation/Reference: Explanation: Show NHRP: Examples The following is sample output from the show ipnhrp command: Router# show ipnhrp www. crypto map: test sa timing: remaining key lifetime (k/sec): (4608000/52) IV size: 8 bytes replay detection support: Y inboundahsas: inboundpcpsas: inboundpcpsas: outboundespsas: spi: 0x3D3(979) transform: esp-3des esp-md5-hmac . expire 01:59:47 TypE. Flags: authoritative unique nat registered used NBMA address: 10. E. } slot: 0.2.2 What does the authoritative flag mean in regards to the NHRP information? A. Tunnel1 created 00:00:12. . The mapping entry was created in response to an NHRP registration request. C. The NHRP mapping entry cannot be overwritten.cisco.com . conn id: 3443.protocols/5409-ipsec-debug-00.html QUESTION 43 Refer to the following output: Router#showipnhrp detail 10.12. in use settings ={Tunnel.1.1.Website designed to help IT pros advance their careers. flow_id: 1444. D. Data packets are process switches for this mapping entry.com/c/en/us/support/docs/security-vpn/ipsec-negotiation-ike. crypto map: test sa timing: remaining key lifetime (k/sec): (4608000/52) IV size: 8 bytes replay detection support: Y outboundahsas: outboundpcpsas: Reference: http://www. flow_id: 1443.dynamic.1. in use settings ={Tunnel.

1111.255 because Cisco does not support aggregation of NBMA information through NHRP. D.1. Solution www. · The interface type and number and how long ago it was created (hours:minutes:seconds).255. Tunnel0 created 0:10:03 expire 1:49:56 Type: static Flags: authoritative NBMA address: 10.10. . This value is based on the ipnhrpholdtime command. Reference: http://www.0.1111. C.255.11 10.1111.0.2 The fields in the sample display are as follows: · The IP address and its network mask in the IP-to-NBMA address cache.255.255. · Type of interface: dynamic--NBMA address was obtained from the NHRP Request packet.1.255.255. static--NBMA address was statically configured.1111. tunnel 100 created 0:00:43 expire 1:59:16 Type: dynamic Flags: authoritative NBMA address: 10. B.1 255.com . · Flags: authoritative--Indicates that the NHRP information was obtained from the Next Hop Server or router that maintains the NBMA-to-IP address mapping for a particular destination.Website designed to help IT pros advance their careers.1111.cisco. The mask is always 255.1111.0.255. · The time in which the positive and negative authoritative NBMA address will expire (hours:minutes:seconds).vceplus.2 255.com/c/en/us/td/docs/ios/12_4/ip_addr/configuration/guide/hadnhrp.html QUESTION 44 Which common issue causes intermittent DMVPN tunnel flaps? A.255.1111.0.1111. a routing neighbor reachability issue a suboptimal routing table interface bandwidth congestion that the GRE tunnel to hub router is not encrypted Correct Answer: A Section: VPN Technologies Explanation Explanation/Reference: Explanation: DMVPN Tunnel Flaps Intermittently Problem DMVPN tunnel flaps intermittently.1111.

D. · OSPFv3 is not supported.pdf QUESTION 46 Which three characteristics are shared by subinterfaces and associated EVNs? (Choose three.com/c/en/us/td/docs/ios-xml/ios/evn/configuration/xe-3s/evn-xe-3s. C. C. Gigabit Ethernet. In order to resolve this problem.cisco. Reference: http://www. OSPFv2 is supported. 802. D.1q encapsulation. B.) A. B.book/evn-overview. you cannot configure VRF-Lite on the same interface.html#Prblm1 QUESTION 45 Which encapsulation supports an interface that is configured for an EVN trunk? A. · If an EVN trunk is configured on an interface. and port channels. such as Fast Ethernet.com/c/en/us/support/docs/securityvpn/ipsec-negotiation-ike.When DMVPN tunnels flap.1Q ISL PPP Frame Relay MPLS HDLC Correct Answer: A Section: VPN Technologies Explanation Explanation/Reference: Explanation: Restrictions for EVN · An EVN trunk is allowed on any interface that supports 802.com .cisco.vceplus. Reference: http://www. . IP address routing table forwarding table access control lists NetFlow configuration Correct Answer: ABC Section: VPN Technologies Explanation www. make sure the neighborship between the routers is always up. E. F.Website designed to help IT pros advance their careers. · A single IP infrastructure can be virtualized to provide up to 32 virtual networks end-to-end.protocols/29240-dcmvpn. E. check the neighborship between the routers as issues with neighborship formation between routers may cause the DMVPN tunnel to flap.

users must enter the URL in the form https://<address>. input a prescribed IP address.cisco. the trunk interface is identified by the same IP address in different EVN contexts. it downloads the client that matches the operating system of the remote computer. If the user satisfies the login and authentication. After doing this.Explanation/Reference: Explanation: A trunk interface can carry traffic for multiple EVNs. In other words. To simplify the configuration process. This is accomplished as a result of each EVN having a unique routing and forwarding table. After downloading. NHRP.vceplus. C.Website designed to help IT pros advance their careers. and Cisco Express Forwarding? A. B. all the subinterfaces and associated EVNs have the same IP address assigned. and follow the instructions. thereby enabling support for overlapping IP addresses across multiple EVNs. . After entering the URL.com/en/US/docs/iosxml/ios/evn/configuration/xe-3sg/evn. C. Unless the security appliance is configured to redirect http:// requests to https://.html QUESTION 48 Which Cisco IOS VPN technology leverages IPsec.overview. establishes a secure SSL connection and either remains or uninstalls itself (depending on the security appliance configuration) when the connection terminates. mGRE.cisco.com/c/en/us/support/docs/security/asa-5500-x-series-next. the browser connects to that interface and displays the login screen. Which type of remote access did the engineer enable? A. dynamic routing protocol. the user is able to access company shares. D. the client installs and configures itself. FlexVPN DMVPN GETVPN Cisco Easy VPN www. and the security appliance identifies the user as requiring the client. The network engineer advises the user to open a web browser.com . Reference: http://www. B. remote users enter the IP address in their browser of an interface configured to accept SSL VPN connections. EZVPN IPsec VPN client access VPDN client access SSL VPN client access Correct Answer: D Section: VPN Technologies Explanation Explanation/Reference: Explanation: The Cisco AnyConnect VPN Client provides secure SSL connections to the security appliance for remote users.generation-firewalls/100936-asa8x-split-tunnel-anyconnect-config.pdf QUESTION 47 A user is having issues accessing file shares on a network. Reference: http://www. Without a previously installed client. D.

IPv6 access list has just one entry. This dynamic-mesh capability alleviates the need for any load on the hub to route data between the spoke networks. including IPsec (Internet Protocol Security) and ISAKMP (Internet Security Association and Key Management Protocol) peers. D.vceplus.org/wiki/Dynamic_Multipoint_Virtual_Private_Network Topic 5. BGP) Dynamic IPsec encryption Cisco Express Forwarding (CEF) Reference: http://en. tunnels between spokes can be dynamically built on demand (dynamic-mesh) without additional configuration on the hubs or spokes. NHRP and IPsec. no change in the configuration on the hub is required to accept new spokes. which allows only www. GRE. DMVPN is initially configured to build out a hub-and-spoke network by statically configuring the hubs (VPN headends) on the spokes. all traffic to vty 0 4 from source 2001:DB8:0:4::32 only ssh traffic to vty 0 4 from source all only ssh traffic to vty 0 4 from source 2001:DB8:0:4::32 all traffic to vty 0 4 from source all Correct Answer: C Section: Infrastructure Security Explanation Explanation/Reference: Explanation: Here we see that the IPv6 access list called cisco is being applied to incoming VTY connections to the router. DMVPN is combination of the following technologies: Multipoint GRE (mGRE) Next-Hop Resolution Protocol (NHRP) Dynamic Routing Protocol (EIGRP. .com . B.Correct Answer: B Section: VPN Technologies Explanation Explanation/Reference: Explanation: Dynamic Multipoint Virtual Private Network (DMVPN) is a dynamic tunneling form of a virtual private network (VPN) supported on Cisco IOS-based routers and Unix-like Operating Systems based on the standard protocols. OSPF. RIP.Website designed to help IT pros advance their careers.wikipedia. Using this initial hub-and-spoke network. This DMVPN provides the capability for creating a dynamic-mesh VPN network without having to pre-configure (static) all possible tunnel end-point peers. C. Infrastructure Security QUESTION 49 Which traffic does the following configuration allow? ipv6 access-list cisco permit ipv6 host 2001:DB8:0:4::32 any eqssh linevty 0 4 ipv6 access-class cisco in A.

You can use the KRON scheduler. QUESTION 50 For troubleshooting purposes. A large amount of IP traffic is being permitted on the router. E. Correct Answer: C Section: Infrastructure Security Explanation Explanation/Reference: Explanation: www. A packet that matches access-list with the "log" keyword is Cisco Express Forwarding switched. Always use with the access-list command to apply an extended ACL to the debug output. Correct Answer: C Section: Infrastructure Security Explanation Explanation/Reference: Explanation: The debug ip packet command generates a substantial amount of output and uses a substantial amount of system resources.cisco. the network engineer notices that the router CPU utilization has risen to 99 percent. You can use the RITE traffic exporter. You can disable the IP route cache globally. C.dmvpn/111976-dmvpn-troubleshoot-00. This command should be used with caution in production networks. B. D. You can use an IOS parser. You can use an extended access list. which method can you use in combination with the debug ip packet command to limit the amount of output data? A.vceplus. Reference: http://www. A packet that matches access-list with the "log" keyword is process switched. D. What is the reason for this? A.com .Website designed to help IT pros advance their careers. C.the single IPv6 IP address of 2001:DB8:0:4::32 to connect using SSH only. A packet that matches access-list with the "log" keyword is fast switched.com/c/en/us/ support/docs/security/dynamic-multipoint-vpn. access-list 100 permit ip any any log After applying the access list on a Cisco router. B. .html QUESTION 51 Refer to the following access list.

C. and broadcast mode strict mode.html QUESTION 53 What are the three modes of Unicast Reverse Path Forwarding? A. and the rest of the Internet. B. Unicast RPF deflects such attacks by forwarding only packets that have source addresses that are valid and consistent with the IP routing table. a number of common types of denial-of-service (DoS) attacks.com/web/about/security/intelligence/acl-logging. B. D. and VRF mode strict mode. This action protects the network of the ISP.vceplus.cisco. . and VRF mode Correct Answer: A Section: Infrastructure Security Explanation Explanation/Reference: Explanation: www.com .cisco. loose mode. ACL logging can be CPU intensive and can negatively affect other functions of the network device. broadcast mode. strict mode. Reference: http://www. For example. can take advantage of forged or rapidly changing source IP addresses to allow attackers to thwart efforts to locate or filter the attacks. its customer. and VRF mode broadcast mode.com/en/US/docs/ios/12_2/security/configuration/guide/scfrpf. loose mode. Reference: http://www.Logging-enabled access control lists (ACLs) provide insight into traffic as it traverses the network or is dropped by network devices. source address destination address router interface default gateway Correct Answer: A Section: Infrastructure Security Explanation Explanation/Reference: Explanation: The Unicast RPF feature helps to mitigate problems that are caused by the introduction of malformed or forged (spoofed) IP source addresses into a network by discarding IP packets that lack a verifiable IP source address. For Internet service providers (ISPs) that provide public access. D. Unfortunately.Website designed to help IT pros advance their careers.html#4 QUESTION 52 Which address is used by the Unicast Reverse Path Forwarding protocol to validate a packet against the routing table? A. including Smurf and Tribal Flood Network (TFN). C. loose mode. There are two primary factors that contribute to the CPU load increase from ACL logging: process switching of packets that match log-enabled access control entries (ACEs) and the generation and transmission of log messages.

com/web/about/security/intelligence/unicast-rpf.255.255.255. Reference: http://www.16. This ACL is used to prevent all packets with a spoofed reserved private source IP address to enter the www.0.168. Additionally. which allows the use of the default route in the source verification process.0-192.255.255.0 .255.0-10.255.0 0.Network administrators can use Unicast Reverse Path Forwarding (Unicast RPF) to help limit the malicious traffic on an enterprise network.255 and logs any intrusion attempts. Correct Answer: C Section: Infrastructure Security Explanation Explanation/Reference: Explanation: The private IP address ranges defined in RFC 1918 are as follows: 10. It filters incoming traffic from private addresses in order to prevent spoofing and logs any intrusion attempts. This security feature works by enabling a router to verify the reachability of the source address in packets being forwarded. Administrators can change this behavior using the allow-default option. When administrators use Unicast RPF in strict mode.cisco. Note that not all network devices support all three modes of operation.16. B. It prevents incoming traffic from IP address ranges 10. This capability can limit the appearance of spoofed addresses on a network.10. 192.16. the packet must be received on the interface that the router would use to forward the return packet.0.168.html QUESTION 54 What does the following access list.0.0.0.0.192. When administrators use Unicast RPF in loose mode. Unicast RPF loose mode is a scalable option for networks that contain asymmetric routing paths.0 0. loose mode. or VRF mode.0.15. Unicast RPF configured in strict mode may drop legitimate traffic that is received on an interface that was not the router's choice for sending return traffic.0.255. C.31.0.255. Although asymmetric traffic flows may be of concern when deploying this feature.255 172.255 192.255 any log router (config)#access-list 101 deny ip 192. D. It prevents private internal addresses to be accessed directly from outside.0.255 any log router (config) #access-list 101 deny ip 172.255 These IP addresses should never be allowed from external networks into a corporate network as they would only be able to reach the network from the outside via routing problems or if the IP addresses were spoofed. accomplish? router(config)#access-list 101 deny ip 10. An access list may also be specified that permits or denies certain source addresses in Unicast RPF loose mode.168. .255 any log router (config)#access-list 101 permit ip any any router (config)#interface fastEthernet 1/0 router (config-if)#ip access-group 101 in A. Dropping this legitimate traffic could occur when asymmetric routing paths are present in the network.0 . a packet that contains a source address for which the return route points to the Null 0 interface will be dropped.31.168. which is applied on the external interface FastEthernet 1/0 of the perimeter router. If the source IP address is not valid. the source address must appear in the routing table.Website designed to help IT pros advance their careers.0. Unicast RPF in VRF mode will not be covered in this document.0 .0.com . It prevents the internal network from being used in spoofed denial of service attacks and logs any exit to the Internet.0.255.168. Unicast RPF works in one of three different modes: strict mode. the packet is discarded.0.0.172.172.255.0.255.vceplus.0 0. 172. Care must be taken to ensure that the appropriate Unicast RPF mode (loose or strict) is configured during the deployment of this feature because it can drop legitimate traffic.

B. C.html#wp3612805529 QUESTION 56 A network engineer is configuring a routed interface to forward broadcasts of UDP 69.14. 53. use the no form of this command. .20.225. The default is 443.network.20. router(config-if)#ip helper-address 172.14.sh. D. To return the HTTPS server port number to the default. and 49 to 172. B.Website designed to help IT pros advance their careers.225 69 53 49 Correct Answer: A Section: Infrastructure Security www. Which command should be applied to the configuration to allow this? A.14. The router will listen to HTTP and HTTP traffic on port 4433.225 router(config-if)#ip helper-address 172.vceplus.14.20.20.cisco.20. D.com/en/US/docs/ios-xml/ios/https/command/nm-https-cr-cl. QUESTION 55 Refer to the following command: router(config)# ip http secure-port 4433 Which statement is true? A. but the port number must be number higher than 1024 unless the default is used.225 router(config-if)#ipudp helper-address 172. C. iphttpsecure-portport-number noiphttpsecure-port Syntax Description port.225 router(config-if)#udp helper-address 172. The router will listen on port 4433 for HTTP traffic.14. Reference: http://www. Correct Answer: A Section: Infrastructure Security Explanation Explanation/Reference: Explanation: To set the secure HTTP (HTTPS) server port number for listening. The router will listen on port 4433 for HTTPS traffic.com . The log keyword also enables logging of this intrusion attempt. use the ip http secure-port command in global configuration mode.Integer in the range of 0 to 65535 is accepted. The router will never accept any HTTP and HTTPS traffic.

the engineer is not concerned with authentication or encryption.16.vceplus. Infrastructure Services QUESTION 57 A network engineer is configuring SNMP on network devices to utilize one-way SNMP notifications. ip helper-address {ip address} When configuring the ip helper-address command.16. which determines the access policy for its users. but I would suggest otherwise. each user is added to a group. there are some major changes under the hood.Explanation Explanation/Reference: Explanation: To let a router forward broadcast packet the command ip helper-address can be used. no encryption) to authenticate polling and trap delivery. SNMP version 3 moves away from the community string approach in favor of user.201.port 37 · NetBIOS Name Server .UDP port 69 · Domain Name System (DNS) UDP port 53 · Time service .16. The users are not actual local user accounts. D.port 138 · Bootstrap Protocol (BOOTP) . Reference: http://www.Website designed to help IT pros advance their careers.com/snmp-version-3/ www. Like IPv4 to IPv6.port 67 · TACACS UDP port 49 Reference: http://www.28 informs version 3 auth CISCORO Correct Answer: A Section: Infrastructure Services Explanation Explanation/Reference: Explanation: Most network admins and engineers are familiar with SNMPv2c which has become the dominant SNMP version of the past decade. The problem of course is that the SNMP statistical payload is not encrypted and authentication is passed in cleartext. groups. However. C.28 traps version 2c CISCORO router(config)#snmp-server host 172.201. rather they are simply a means to determine who can authenticate to the device. Most companies have decided that the information being transmitted isn`t valuable enough to be worth the extra effort in upgrading to SNMPv3. router(config)#snmp-server host 172.com . The view is used to define what the user account may access on the IOS device. It`s simple to configure on both the router/switch-side and just as easy on the network monitoring server.28 informs version 2c CISCORO router(config)#snmp-server host 172.port 137 · NetBIOS Datagram Server .cisco-faq. the following broadcast packets will be forwarded by the router by default: · TFTP . views.201. SNMP version 2 uses community strings (think cleartext passwords.html Topic 6.com/163/forward_udp_broadcas. Which command satisfies the requirements of this scenario? A.16. The broadcasts will be forwarded to the unicast address which is specified with the ip helper command.ccnpguide.201.based authentication and view-based access control. Users. Finally. .28 traps version 3 auth CISCORO router(config)#snmp-server host 172. B.

The following security levels exits: noAuthNoPriv (no authentiation and no encryption noauth keyword in CLI).com/2008/07/19/snmpv3-tutorial/ QUESTION 59 After a recent DoS attack on a network. senior management asks you to implement better logging functionality on all IOS-based devices.ine. C. Increase the logging history . SNMPv3. B. C. Reference: http://blog. E. AuthNoPriv (messages are authenticated but not encrypted auth keyword in CLI).vceplus. Disable event logging on all noncritical items. B. Correct Answer: AB Section: Infrastructure Services Explanation Explanation/Reference: Explanation: www.QUESTION 58 When using SNMPv3 with NoAuthNoPriv. AuthPriv (messages are authenticated and encrypted priv keyword in CLI). Which two actions can you take to provide enhanced logging results? (Choose two. The SNMPv3 implementations could be configured to use either of the models on per-group basis (in case if noAuthNoPriv is configured. SNMPv1 and SNMPv2 models only support the noAuthNoPriv model since they use plain community string to match the incoming packets.Website designed to help IT pros advance their careers. Use the msec option to enable service time stamps.) A. Specify a logging rate limit. username serves as a replacement for community string). username password community-string encryption-key Correct Answer: A Section: Infrastructure Services Explanation Explanation/Reference: Explanation: The following security models exist: SNMPv1. which string is matched for authentication? A. D. D. . Set the logging severity level to 1. SNMPv2.com .

Core dumps are generally very useful to your technical support representative. B. use the logging history command in global configuration mode. or to correlate the order that the events happened. In this situation. in other words. what is the result of the command? A. Assuming that an NTP server is already set up. www. . and SNMP messages will be sent by the less sever (5-7) messages. It enables receiving NTP broadcasts on all interfaces globally. E. it is sometimes useful to obtain a full copy of the memory image (called a core dump) to identify the cause of the crash.Website designed to help IT pros advance their careers. more granular monitoring can occur. which feature can the engineer use to create a crash collection? A. alert.com/en/US/docs/internetworking/troubleshooting/guide/tr19aa." By increasing the severity level.com . "saving level warnings or higher.vceplus.cisco. QUESTION 60 A network engineer finds that a core router has crashed without warning. By default. C. B. Cisco devices Log error messages of severity levels 0 through 4 (emergency.The optional msec keyword specifies the date/time format should include milliseconds. It enables receiving NTP broadcasts on the interface where the command was executed. To limit syslog messages sent to the router's history table and to an SNMP network management station based on severity. secure copy protocol core dumps warm reloads SNMP NetFlow Correct Answer: B Section: Infrastructure Services Explanation Explanation/Reference: Explanation: When a router crashes. D. Four basic ways exist for setting up the router to generate a core dump: · Using Trivial File Transfer Protocol (TFTP) · Using File Transfer Protocol (FTP) · Using remote copy protocol (rcp) · Using a Flash disk Reference: http://www. critical. error.html QUESTION 61 A network engineer is trying to implement broadcast-based NTP in a network and executes the ntp broadcast client command. This can aid in pinpointing the exact time of events. and warning levels).

C. and to transports that use the TCP/UDP/DCCP (Datagram Congestion Control Protocol) pseudo-header and checksum NPTv6 provides a simple and compelling solution to meet the address-independence requirement in IPv6.ietf.cisco. checksum-neutral. B. the NTP service is activated (if it has not already been activated) and the device is configured to receive NTP broadcast packets on a specified interface simultaneously. NPTv6 is defined to include a two-way. Reference: http://tools. algorithmic translation function. It enables a device to be an NTP peer to another device. and nothing else. It interferes with encryption of the full IP payload. It is transport-agnostic with respect to transports that do not checksum the IP header. Correct Answer: A Section: Infrastructure Services Explanation Explanation/Reference: Explanation: The NTP service can be activated by entering any ntp command. Reference: http://www. It enables a device to receive NTP broadcast and unicast packets. Correct Answer: C Section: Infrastructure Services Explanation Explanation/Reference: Explanation: RFC 6296 describes a stateless IPv6-to-IPv6 Network Prefix Translation (NPTv6) function. It is checksum-neutral. D.com/c/en/us/td/docs/ios-xml/ios/bsm/command/bsm-xe-3se-3850. When you use the ntp broadcast client command. The address-independence benefit stems directly from the translation function of the network prefix translator. such as SCTP.org/html/rfc6296 QUESTION 63 www. It rewrites transport layer headers. It maintains a per-node state.vceplus.Website designed to help IT pros advance their careers.html QUESTION 62 What is a function of NPTv6? A. designed to provide address independence to the edge network.com . C. To avoid as many of the issues associated with NAPT44 as possible. .cr-book/bsm-xe-3se-3850-cr-book_chapter_00. D. Command Description ntp broadcast Allows the system to receive NTP broadcast packets on an client interface.

B. The IPv6 client embeds the IPv4 address it wishes to communicate with using these bits. but not to the servers.Website designed to help IT pros advance their careers. D. as shown in the "TCP Connect Operation" figure in the "Information About the IP SLAs TCP Connect Operation" section. B.1). RFC 6146).IPv6 has just been deployed to all of the hosts within a network. C.com .0. D. The NAT64 server then creates a NAT-mapping between the IPv6 and the IPv4 address. C. the control protocol is disabled on the source (Device B). The NAT64 server is the endpoint for at least one IPv4 address and an IPv6 network segment of 32-bits (for instance 64:ff9b::/96.wikipedia. connectionless-oriented service-oriented connection-oriented application-oriented Correct Answer: C Section: Infrastructure Services Explanation Explanation/Reference: Explanation: Configuration Examples for IP SLAs TCP Connect Operations The following example shows how to configure a TCP Connection-oriented operation from Device B to the Telnet port (TCP port 23) of IP Host 1 (IP address 10. NAT NATng NAT64 dual-stack NAT DNS64 Correct Answer: C Section: Infrastructure Services Explanation Explanation/Reference: Explanation: NAT64 is a mechanism to allow IPv6 hosts to communicate with IPv4 servers. Reference: http://en. . In this example. Which type of statistics does the engineer see? A.0. and sends its packets to the resulting address. allowing them to communicate. Which feature allows IPv6 devices to communicate with IPv4 servers? A.org/wiki/NAT64 QUESTION 64 A network engineer initiates the ipsla responder tcp-connect command in order to gather statistics for performance gauging. IP SLAs uses the control protocol to notify the IP SLAs responder to enable the target port temporarily.vceplus. see RFC 6052. E. This action allows the responder to reply to the TCP Connect www. The operation is scheduled to start immediately.

vceplus. configure terminal 3.Website designed to help IT pros advance their careers. www. there is no need to send the control message. Flow-set marking in 1280-byte or larger packets is enabled. B. Device A (target device) Configuration configure terminal ipsla responder tcp-connect ipaddress 10. because the target is not a Cisco device and a well. Example: Device> enable Step 2 configure terminal Enters global configuration mode.mt-book/ sla_tcp_conn. exit 5. enable 2. C. .0.known TCP port is used. IPv6 flow control is enabled on the router. In this example.cisco. SUMMARY STEPS 1.0. D.1 port 23 Reference: http://www. Enter your password if prompted.html QUESTION 65 A network engineer executes the ipv6 flowset command. ipv6flowset 4. clear ipv6 mtu DETAILED STEPS Command or Action Purpose Step 1 enable Enables privileged EXEC mode.operation. Correct Answer: A Section: Infrastructure Services Explanation Explanation/Reference: Explanation: Enabling Flow-Label Marking in Packets that Originate from the Device This feature allows the device to track destinations to which the device has sent packets that are 1280 bytes or larger.com . IPv6 PMTU is enabled on the router.com/c/en/us/td/docs/ios-xml/ios/ipsla/configuration/15-mt/sla-15. Flow-label marking in 1280-byte or larger packets is enabled. What is the result? A.

B. Example: Device(config)# ipv6 flowset Reference: http://www.Example: Device# configure terminal Step 3 ipv6 flowset Configures flow-label marking in 1280-byte or larger packets sent by the device.1 Specifies the export destinations and ports.1. IP address 10.html QUESTION 66 A network engineer executes the show ip flow export command.cisco.1 The ports are in parentheses.com .vceplus. www. (1000) and 10. .1 Version 5 flow records Specifies the version of the flow. output drops enqueuing for the RP fragmentation failures adjacency issues Correct Answer: A Section: Infrastructure Services Explanation Explanation/Reference: Explanation: Table 5 show ip flow export Field Descriptions Field Description Exporting flows to 10.Website designed to help IT pros advance their careers.2. and datagrams the total number of flows contained within them.com/c/en/us/td/docs/ios-xml/ios/ipv6_basic/configuration/15.mt/ip6b-15-mt-book/ip6-mtu-path-disc.3.1. Which line in the output indicates that the send queue is full and export packets are not being sent? A. C. 11 flows exported in 8 udp The total number of export packets sent.1. Exporting using source Specifies the source address or interface.1. D.

The command access-list 1 permit any defines only one machine that is allowed through the tunnel. Correct Answer: D Section: Infrastructure Services Explanation Explanation/Reference: www. 0 export packets were dropped due to IPC rate limiting 0 export packets were Indicates that the send queue was full while dropped due to output the packet was being transmitted. . fragmentation failures 0 export packets were dropped due to encapsulation fixup failures 0 export packets were Indicates that there was a problem transferring dropped enqueuing for the the export packet between the RP and the line RP card.vceplus. C. drops Reference: http://www. B.html QUESTION 67 A network engineer is asked to configure a "site-to-site" IPsec VPN tunnel. 0 export packets were sent The packet could not be processed by CEF or up to process level by fast switching. The command ipnat inside source list 1 int s0/0 overload provides "many-to-one" access for all devices on a defined segment to share a single IP address upon exiting the external interface.com/c/en/us/td/docs/ios/12_0s/feature/guide/oaggnf. D.cisco. 0 export packets were dropped due to adjacency issues 0 export packets were Indicates that the packet was dropped because dropped due to of problems constructing the IP packet.0 flows failed due to lack of No memory was available to create an export export packet packet.com . 0 export packets were Indicates that CEF was unable to switch the dropped due to no fib packet or forward it up to the process level. possibly because another feature requires running on the packet.Website designed to help IT pros advance their careers. The command ipnat inside source list 1 int s0/0 overload disables "many-to-one" access for all devices on a defined segment to share a single IP address upon exiting the external interface. One of the last things that the engineer does is to configure an access list (access-list 1 permit any) along with the command ipnat inside source list 1 int s0/0 overload. The command access-list 1 defines interesting traffic that is allowed through the tunnel. Which functions do the two commands serve in this scenario? A.

64 255.vceplus.255.31 access-list 7 permit 10.Defines a NAT pool named ovrld with a range of a single IP !--.10.0 0.16.255. !--.31 www.com .Defines serial 0 with an IP address and as a NAT outside interface.10.10. interface serial 0 ip address 172.10.Defines Ethernet 1 with an IP address and as a NAT inside interface.20.Translations are overloaded.0.255.0.16.16.Website designed to help IT pros advance their careers.10.10.translated to an address out of the NAT pool named ovrld.0.16. which allows multiple inside !--.0 ipnat inside !--.devices to be translated to the same valid IP address. ipnat inside source list 7 pool ovrld overload ! ! ! ! !--.are permitted by access-list 7 has the source address !--.Explanation: Configuring NAT to Allow Internal Users to Access the Internet Using Overloading NAT Router interface ethernet 0 ip address 10.1 255.10.255.Indicates that any packets received on the inside interface that !--.0 ipnat inside !--. ipnat pool ovrld 172.1 172.10. .255.1 prefix 24 ! !--.1.0 0.0. access-list 7 permit 10.1 255.address.0 ipnat outside !--. 172.Defines Ethernet 0 with an IP address and as a NAT inside interface. interface ethernet 1 ip address 10.10.20.255.10.

E.10.Access-list 7 permits packets with source addresses ranging from !--. as an alternative to powering down the active router and letting the network respond accordingly. Track the up/down state of a loopback interface and shut down this interface during maintenance.0 through 10.shtml QUESTION 68 A network engineer is configuring a solution to allow failover of HSRP nodes during maintenance windows. This means that another HSRP router with higher priority can become the active router if that router has standby preempt enabled. Reference: http://www.0 through 10.10. which allows for maintenance mode.html QUESTION 69 A network engineer is notified that several employees are experiencing network performance related issues. Adjust the HSRP priority without the use of preemption. information such as the source/destination IP and Layer 4 port numbers is required. Which feature should the engineer use to gather the required information? A.cisco. If the line protocol of the specified interface goes down.hsrp/13780-6. the NAT pool "ovrld"only has a range of one address. SNMP Cisco IOS EEM NetFlow Syslog WCCP www. D.com/en/US/tech/tk648/tk361/technologies_tech_note09186a0080094e77.10.vceplus. The keyword overload used in the ipnat inside source list 7 pool ovrld overload command allows NAT to translate multiple inside devices to the single address in the pool. C. B.cisco. .10. Correct Answer: A Section: Infrastructure Services Explanation Explanation/Reference: Explanation: The standby track command allows you to specify another interface on the router for the HSRP process to monitor in order to alter the HSRP priority for a given group.Website designed to help IT pros advance their careers. Note in the previous second configuration.10. Enable HSRPv2 under global configuration. the HSRP priority is reduced. Disable and enable all active interfaces on the active HSRP node.10.31.20. so when this interface is shut down the HSRP priority for that router will be lowered and the other HSRP router will then become the active one. and bandwidth-intensive applications are identified as the root cause. Loopback interfaces can be tracked. C.com . Which action will allow for manual switching of HSRP nodes? A.20. B. In order to identify which specific type of traffic is causing this slowness.com/c/en/us/support/docs/ip/hot-standby-router-protocol.31 and 10.10. D. Reference: http://www.!--.

D.html QUESTION 70 An organization decides to implement NetFlow on its network to monitor the fluctuation of traffic that is disrupting core services. Cisco Express Forwarding has not been configured globally.cisco. the network engineer is unable to see OUT traffic on the interfaces.Correct Answer: C Section: Infrastructure Services Explanation Explanation/Reference: Explanation: NetFlow Flows Key Fields A network flow is identified as a unidirectional stream of packets between a given source and destination--both are defined by a network-layer IP address and transport-layer source and destination port numbers. What is switching? A Router must make decisions about where to forward the packets passing through. What can you determine based on this information? A. NetFlow Analyzer started showing OUT traffic for the interfaces. Specifically. This is why this topic is about Cisco Express Forwarding.com .Website designed to help IT pros advance their careers. Flow Export version 9 is in use.vceplus. NetFlow output has been filtered by default. Switching is what a router does when it makes the following decisions: www. . The command ip flow-capture fragment-offset has been enabled. Every NetFlow configuration aspect was checked and nothing incorrect was found. B. After reviewing the output of NetFlow. This decision-making process is called switching. a flow is identified as the combination of the following key fields: Source IP address Destination IP address Source Layer 4 port number Destination Layer 4 port number Layer 3 protocol type Type of service (ToS) Input logical interface Reference: http://www. CEF was enabled at the global level and within seconds. Correct Answer: A Section: Infrastructure Services Explanation Explanation/Reference: Explanation: We came across a recent issue where a user setup a router for NetFlow export but was unable to see the OUT traffic for the interfaces in NetFlow Analyzer.com/en/US/docs/ios-xml/ios/netflow/configuration/12-4t/cfg-nflow.data-expt. C. That is when we noticed the no ipcef` command on the router.

CEF offers the following benefits: 1. ie. The FIB is organized differently than the routing table and CEF uses the FIB to decide which interface to send traffic from. What is CEF? CEF is one of the available switching options for Cisco routers. what is the next hop of the router and which interface will the router use to get to that destination. Any NetFlow analyzer product will calculate the OUT traffic for an interface based on the Destination Interface value present in the NetFlow packets exported from the router. B. Overall. Without enabling the CEF on the router.vceplus. the NetFlow packets did not mark the destination interfaces and so NetFlow Analyzer was not able to show the OUT traffic for the interfaces. When enabled. simply use the no` form of the command. Why CEF Needed when enabling NetFlow ? CEF is a prerequisite to enable NetFlow on the router interfaces.com/network-2/netflowanalyzer/2010/05/19/need-for-cef. If the CEF is disabled on the router. CEF decides through which interface traffic is exiting the router. 2. CEF can switch traffic faster than route-caching using fast-switching How to enable CEF? CEF is disabled by default on all routers except the 7xxx series routers. Router#config t Router(config)#ipcef Router(config)# To disable CEF. noipcef. the NetFlow packets exported from the router will have Destination interface as null and this leads NetFlow Analyzer to show no OUT traffic for the interfaces. Enabling and Disabling CEF is easy. The following command is entered: switch#show flow exporter Flow_Exporter-1 What is the expected output? A. 2. To enable CEF. If the destination is reachable.com .1. CEF creates its own table. configuration of the specified flow exporter current status of the specified flow exporter status and statistics of the specified flow monitor configuration of the specified flow monitor Correct Answer: B Section: Infrastructure Services Explanation Explanation/Reference: Explanation: www.Website designed to help IT pros advance their careers. Whether to forward or not forward the packets after checking that the destination for the packet is reachable. allows for advanced features like NBAR 3. Reference: https://blogs. Better performance than fast-switching (the default) and takes less CPU to perform the same task. C. called the Forwarding Information Base (FIB).in-netflow-data-export. . D.html QUESTION 71 A network engineer has left a NetFlow capture enabled over the weekend to gather information regarding excessive bandwidth utilization.manageengine. go into global configuration mode and enter the CEF command. Based on the routing table.

com . DNS NAT port redirection stateless translation session handling www.cisco.com/en/US/docs/ios-xml/ios/fnetflow/configuration/15-mt/cfg-de. and redundancy and load sharing.pdf QUESTION 73 Which two functions are completely independent when implementing NAT64 over NAT-PT? (Choose two. What is the best solution to ensure compliance with this new policy? A. 1-to-1. Reference: http://www.vceplus. and IPv6 to IPv6 translations at the Internet edge are performed. B. NAT64 NAT44 NATv6 NPTv4 NPTv6 Correct Answer: E Section: Infrastructure Services Explanation Explanation/Reference: Explanation: NPTv6 provides a mechanism to translate the private internal organization prefixes to public globally reachable addresses. B.show flow exporter exporter-name (Optional) Displays the current status of the specified flow exporter. The use cases for NPTv6 outlined in the RFC include peering with partner networks. Example: Device# show flow exporter FLOW_EXPORTER-1 Reference: http://www. C. D.) A. The translation mechanism is stateless and provides a 1:1 relationship between the internal addresses and external addresses. E. . E. C.com/c/dam/en/us/td/docs/solutions/SBA/August2012/Cisco_SBA_BN_IPv6Ad dressingGuide-Aug2012.cisco.fnflow-exprts. D.Website designed to help IT pros advance their careers.html QUESTION 72 A company's corporate policy has been updated to require that stateless. multi homing.

or an edge network). Table 2. F. C.) A. The DNS64 and NAT64 functions are completely separated. E. or NAT64. an access. G.html QUESTION 74 Which two methods of deployment can you use when implementing NAT64? (Choose two. The following table provides a high-level overview of the most relevant differences.Website designed to help IT pros advance their careers. Differences Between Stateless NAT64 and Stateful NAT64 Stateless NAT64 Stateful NAT64 1:1 translation 1:N translation No conservation of IPv4 address Conserves IPv4 address Assures end-to-end address Uses address overloading. there are important differences.com . hence lacks transparency and scalability in end-to-end address transparency www.solution/white_paper_c11-676278.com/c/en/us/products/collateral/ios-nx-os-software/enterprise-ipv6. This solution allows both enterprises and ISPs to accelerate IPv6 adoption while simultaneously handling IPv4 address depletion. stateless stateful manual automatic static functional dynamic Correct Answer: AB Section: Infrastructure Services Explanation Explanation/Reference: Explanation: While stateful and stateless NAT64 perform the task of translating IPv4 packets into IPv6 packets and vice versa. D. technology facilitates communication between IPv6-only and IPv4-only hosts and networks (whether in a transit. which is essential to the superiority of NAT64 over NAT-PT.cisco. . Reference: http:// www. B.vceplus.Correct Answer: AB Section: Infrastructure Services Explanation Explanation/Reference: Explanation: Network Address Translation IPv6 to IPv4.

Manual. You add the record to the flow monitor after you create the flow monitor. B. Flow monitors consist of a record and a cache.No state or bindings created on the State or bindings are created on every translation unique translation Requires IPv4-translatable IPv6 No requirement on the nature of IPv6 addresses assignment (mandatory address assignment requirement) Requires either manual or DHCPv6 Free to choose any mode of IPv6 based address assignment for IPv6 address assignment viz.html#w p1314030 QUESTION 76 Refer to the exhibit. Which statement about the output of the show flow-sampler command is true? www. D. .com/c/en/us/products/collateral/ios-nx-os-software/enterprise-ipv6. C. The flow monitor cache is automatically created at the time the flow monitor is applied to the first interface.com/c/en/us/td/docs/ios/fnetflow/command/reference/fnf_book/fnf_01. hosts DHCPv6.cisco. SLAAC Reference: http://www.html QUESTION 75 Which NetFlow component is applied to an interface and collects information about flows? A.cisco. flow monitor flow exporter flow sampler flow collector Correct Answer: A Section: Infrastructure Services Explanation Explanation/Reference: Explanation: Flow monitors are the NetFlow component that is applied to interfaces to perform network traffic monitoring.solution/white_paper_c11-676277. Flow data is collected from the network traffic during the monitoring process based on the key and nonkey fields in the record.vceplus.Website designed to help IT pros advance their careers. Reference: http://www.com . which is configured for the flow monitor and stored in the flow monitor cache.

10. www.A.10. Correct Answer: A Section: Infrastructure Services Explanation Explanation/Reference: Explanation: The sampling mode determines the algorithm that selects a subset of traffic for NetFlow processing. The sampler matched 10 packets. incoming packets are randomly selected so that one out of each n sequential packets is selected on average for NetFlow processing. C. It configures the router to export cache flow information to IP 10.10.Website designed to help IT pros advance their careers.1 and port UDP/5858. For example. It configures the router to receive cache flow information from IP 10. The sampler matched 10 packets. Table 2 show flow-sampler Field Descriptions Field Description Sampler Name of the flow sampler id Unique ID of the flow sampler packets matched Number of packets matched for the flow sampler mode Flow sampling mode sampling interval is Flow sampling interval (in packets) Reference: http://www. The sampler matched 10 packets.10. B.1 on port UDP/5858. 120th.10. one packet every 100 seconds. D.10. if you set the sampling rate to 1 out of 100 packets. It configures the router to export cache flow information about flows with destination IP 10.com . and so on packets.html#wp1084291 QUESTION 77 What is the result of the command ip flow-export destination 10. The sampler matched 10 packets. each packet randomly chosen from every group of 100 packets. C.10.1 5858? A. D. In the random sampling mode that Random Sampled NetFlow uses.vceplus. then NetFlow might sample the 5th. The n value is a parameter from 1 to 65535 packets that you can configure. It configures the router to receive cache flow information about flows with destination IP 10. B.10. . each one randomly chosen from every 100-second interval.cisco. 302nd.10.1 on port UDP/5858. 199th.com/c/en/us/td/docs/ios/12_0s/feature/guide/nfstatsa.10. one packet every 100 packets.1 and port UDP/5858. This sample configuration provides NetFlow data on 1 percent of total traffic.

However.com's corporate implementation guidelines require: • The OSPF process ID for all routers must be 10.54. Syntax Description ip.16.Link between Chicago and NewYork Loopback0 172.cisco.168.16.5/30 .Website designed to help IT pros advance their careers. udp-port UDP protocol-specific port number. • OSPF area 21 must not receive any inter-area or external routes.html#wp1023091 QUESTION 78 Route. Reference: http://www. use theip flow-export destination command in global configuration mode.com is a small IT corporation that is attempting to implement the network shown in the exhibit. they cannot ping from the serial interface of the Seattle router to the loopback interface of the NewYork router. • The serial link between Seattle and Chicago must be in OSPF area 21. Currently the implementation is partially completed.vceplus.com . • The routing protocol must be enabled for each interface using the most specific wildcard mask possible.168.16.54. The loopbackO interface on NewYork is in Area 1. You have been asked to complete the implementation to allow this ping.Link between Seattle and Chicago Secret Password: cisco Chicago S0/0 192.168.com/c/en/us/td/docs/ios/12_0s/feature/guide/12s_mdnf. ROUTE.6/30 .189 www.Link between Chicago and NewYork S0/1 192. The SO/O interface on Chicago and the SO/1 interface on NewYork are in Area 0. • The routing protocol for each interface must be enabled under the routing process.Link between Seattle and Chicago Secre Password: cisco NewYork S0/1 192.10/30 .IP address of the workstation to which you want to send the address NetFlow information.9/30 .Correct Answer: A Section: Infrastructure Services Explanation Explanation/Reference: Explanation: To enable the exporting of information in NetFlow cache entries. .189. OSPF has been configured on routers Chicago and NewYork. Network Information Seattle S0/0 192.168.

vceplus.com .Website designed to help IT pros advance their careers. .Secret Password: cisco www.

vceplus.www.com .Website designed to help IT pros advance their careers. .

Website designed to help IT pros advance their careers. .vceplus.com .www.

com . .Correct Answer: Answer: Here is the solution below: Section: Layer 3 Technologies Explanation Explanation/Reference: Explanation: www.vceplus.Website designed to help IT pros advance their careers.

vceplus.16.com . hence the subnets will increment by 4.5/30 in order to configure the OSPF. 256-252 = 4. we need to find the network address and wildcard mask of 192. but the overall solution is the same.4 Broadcast Address: 192. find the 4th octet of the Network Address: The 4th octet of IP address (192. . Subnet Mask: (Network Bits – 1’s.16.16.255.Note: In actual exam.Website designed to help IT pros advance their careers.5/30.5) belongs to subnet 1 (4 to 7).255. IP Address: 192.168. Network Address: 192.16. www.168. So. First. Seattle’s S0/0 IP Address is 192. the IP addressing.168.16.16.168.7 Lets find the wildcard mask of /30.5 /30 Subnet Mask: 255. Host Bits – 0’s) Lets find the wildcard mask of /30.168. and router hostnames may change.252 Here subtract 252 from 2565.168. OSPF areas and process ID.

Seattle>enable Password: Seattle#conf t Seattle(config)#router ospf 10 Seattle(config-router)#network 192. .16.168.0.Now we configure OSPF using process ID 10 (note the process ID may change to something else in real exam).0.Website designed to help IT pros advance their careers.3 area 21 One of the tasks states that area 21 should not receive any external or inter-area routes (except the default route). Seattle(config-router)#area 21 stub Seattle(config-router)#end Seattle#copy run start Chicago Configuration: Chicago>enable Password: cisco Chicago#conf t Chicago(config)#router ospf 10 We need to add Chicago’s S0/1 interface to Area 21 www.vceplus.com .4 0.

as well as the New York router so there is nothing that needs to be done on that router. In order to accomplish this. Currently EIGRP is configured on all routers R2.0. we must stop LSA Type 5 if we don’t want to send external routes. Your task is to identify and resolve the cause of connectivity failure with the remote office router R3. The remote office router (R3) was previously configured and all corporate subnets were reachable from R3. we have to stop LSA Type 3 and Type 4. in the process of configuring EIGRP stub routing connectivity with the remote network devices off of R3 has been lost. You have corrected the fault when pings from R2 to the R3 LAN interface are successful. R3.vceplus. www. area 21 should not receive any external or inter-area routes (except the default route).4 0.0 subnets. However. .0. and the R3 IP routing table only contains 2 10.16. Once the issue has been resolved you should complete the task by configuring route summarization only to the remote office router R3.168.0. Chicago(config-router)#area 21 stub no-summary Chicago(config-router)#end Chicago#copy run start The other interface on the Chicago router is already configured correctly in this scenario. Therefore we want to configure area 21 as a totally stubby area. JS Industries is interested in using route summarization along with the EIGRP Stub Routing feature to increase network stability while reducing the memory usage and bandwidth utilization to R3. And if we don’t want to send inter-area routes.Chicago(config-router)#network 192.3 area 21 Again.0.com . and R4 in the network. Another network professional was tasked with implementing this solution. QUESTION 79 S Industries has expanded their business with the addition of their first remote office.Website designed to help IT pros advance their careers.

www. .Website designed to help IT pros advance their careers.vceplus.com .

com .vceplus.Website designed to help IT pros advance their careers. .www.

com .www.Website designed to help IT pros advance their careers.vceplus. .

Website designed to help IT pros advance their careers.Correct Answer: Answer: Here are the solution as below: Section: Layer 3 Technologies Explanation Explanation/Reference: Explanation: First we have to figure out why R3 and R4 can not communicate with each other. Use the show running-config command on router R3. www.com . .vceplus.

Therefore we will remove this command and replace it with the eigrp stub command: R3# configure terminal R3(config)# router eigrp 123 R3(config-router)# no eigrp stub receive-only R3(config-router)# eigrp stub R3(config-router)# end Now R3 will send updates containing its connected and summary routes to other routers. Next we will configure router R3 so that it has only 2 subnets of 10.0. This keyword will also prevent any type of route from being sent. Notice that the eigrp stub command equals to the eigrp stub connected summary because the connected and summary options are enabled by default. .Website designed to help IT pros advance their careers.0 network. Use the show ip route command on R3 to view its routing table: www.com .0.vceplus. The receive-only keyword will restrict the router from sharing any of its routes with any other router in that EIGRP autonomous system.Notice that R3 is configured as a stub receive-only router.

0.vceplus.3.2.255. R4> enable R4# conf t R4(config)# interface s0/0 R4(config-if)# ip summary-address eigrp 123 10. to make the routing table of R3 has only 2 subnets we have to summary other subnets into one subnet.255.0 at the interface s0/0 of R4 to summary. the s0/0 interface of R4.0. There is one interesting thing about the output of the show ip route shown above: the 10.0.0/8 is a summary…) then we should use the command ip summary-address eigrp 123 10.0 so that all the ping can work well.2.Because we want the routing table of R3 only have 2 subnets so we have to summary sub-networks at the interface which is connected with R3.0.255. . In conclusion. which is a directly connected network of R3.0/24. We can’t get rid of it in the routing table no matter what technique we use to summary the networks.0 255. we will use the ip summary-address eigrp 123 10.2.Website designed to help IT pros advance their careers. the output is shown below: www.0 255.2.0.0 Now we jump back to R3 and use the show ip route command to verify the effect.0.0. Therefore.0 255. In the output if we don’t see the summary line (like 10.0.com .

Website designed to help IT pros advance their careers. But in your real exam.0/16. for example.0.0.0 255.0 you will leave a /16 network in the output of the show ip route command. Just for your information. if you don’t see the line "10.Note: Please notice that the IP addresses and the subnet masks in your real exam might be different so you might use different ones to solve this question.0. This summarization is better because all the pings can work well.0/8 to summary.0.2.2. R3(config-if)# end www.0. . notice that if you use another network than 10.0.0/8 is a summary. Null0" then you can summarize using the network 10. if you use the command ip summary-address eigrp 123 10.255.com .vceplus.0. Finally don’t forget to use the copy run start command on routers R3 and R4 to save the configurations.

www. . However. You will know that you have corrected the fault when R4's loopback address (FEC0:4:4) can be seen in RTs IPv6 routing table.” QUESTION 80 ROUTE.com is a small IT corporation that has an existing enterprise network that is running IPv6 0SPFv3.R3# copy run start R4(config-if)# end R4# copy run start If the “copy run start” command doesn’t work then use “write memory.com . Special Note: To gain the maximum number of points you must remove all incorrect or unneeded configuration statements related to this issue. R4's loopback address (FEC0:4:4) cannot be seen in R1's IPv6 routing table. You are tasked with identifying the cause of this fault and implementing the needed corrective actions that uses OPSF features and does not change the current area assignments.Website designed to help IT pros advance their careers.vceplus. Currently OSPF is configured on all routers.

vceplus.www.com .Website designed to help IT pros advance their careers. .

www.vceplus.com - Website designed to help IT pros advance their careers.

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The output of the "show running-config" command of R3:

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where this is not possible.2) + Configure virtual link on R3 (from the second output above.4. not "show ip route".2.3 R4(config-router)#end After finishing the configuration doesn’t forget to ping between R1 and R4 to make sure they work. too. In some cases. Note.4.2. Therefore. If you want to check the routing information.2 Save the configuration: R3(config-rtr)#end R3#copy running-config startup-config You should check the configuration of R4.3. not R2's router-id 2. the area 11 will become the transit area. Make sure to remove the incorrect configuration statements to get the full points.3.3.We knew that all areas in an Open Shortest Path First (OSPF) autonomous system must be physically connected to the backbone area (Area 0).vceplus.4"): R3>enable R3#configure terminal R3(config)#ipv6 router ospf 1 R3(config-rtr)#no area 54 virtual-link 4.3.com .4 R3(config-rtr)#area 11 virtual-link 2.4. + Configure virtual link on R2 (from the first output above. Correct Answer: Answer: Here is the solution below: Section: Layer 3 Technologies Explanation Explanation/Reference: Explanation: To troubleshoot the problem.3.2. In this case.Website designed to help IT pros advance their careers. first issue the show running-config on all of 4 routers. Pay more attention to the outputs of routers R2 and R3 The output of the "show running-config" command of R2: www. we learned that the OSPF process ID of R3 is 1 and we have to disable the wrong configuration of "area 54 virtual-link 4.2. we learned that the OSPF process ID of R2 is 1): R2>enable R2#configure terminal R2(config)#ipv6 router ospf 1 R2(config-rtr)#area 11 virtual-link 3. R4(config)#ipv6 router ospf 1 R4(config-router)#no area 54 virtual-link 3.4.3 Save the configuration: R2(config-rtr)#end R2#copy running-config startup-config (Notice that we have to use neighbor router-id 3. use the show ipv6 route command. we can use a virtual link to connect to the backbone through a non-backbone area. The area through which you configure the virtual link is known as a transit area.3. . routers R2 and R3 must be configured with the area <area id> virtuallink <neighbor router-id>command.3.

.4 R3(config-rtr)#area 11 virtual-link 2. routers R2 and R3 must be configured with the area <area id> virtuallink <neighbor router-id>command. we learned that the OSPF process ID of R2 is 1): R2>enable R2#configure terminal R2(config)#ipv6 router ospf 1 R2(config-rtr)#area 11 virtual-link 3. In this case. the area 11 will become the transit area.3.com .vceplus.3. In some cases. The area through which you configure the virtual link is known as a transit area.4"): R3>enable R3#configure terminal R3(config)#ipv6 router ospf 1 R3(config-rtr)#no area 54 virtual-link 4.2) + Configure virtual link on R3 (from the second output above. we learned that the OSPF process ID of R3 is 1 and we have to disable the wrong configuration of "area 54 virtual-link 4.2.Website designed to help IT pros advance their careers.4. not R2's router-id 2.2.4. Therefore.2 Save the configuration: R3(config-rtr)#end R3#copy running-config startup-config www.2.2. we can use a virtual link to connect to the backbone through a non-backbone area.3 Save the configuration: R2(config-rtr)#end R2#copy running-config startup-config (Notice that we have to use neighbor router-id 3.4. where this is not possible.3.3. + Configure virtual link on R2 (from the first output above.The output of the "show running-config" command of R3: We knew that all areas in an Open Shortest Path First (OSPF) autonomous system must be physically connected to the backbone area (Area 0).4.3.

R4(config)#ipv6 router ospf 1 R4(config-router)#no area 54 virtual-link 3. IT policy requires that all outbound HTTP traffic use the frame relay link when it is available.com. ROUTE.3.com .com has two connections to the Internet. . not "show ip route". too. www.You should check the configuration of R4. Make sure to remove the incorrect configuration statements to get the full points. a small IT company.3. use the show ipv6 route command. No static or default routing is allowed. You may use the Test Workstation to generate HTTP traffic to validate your solution.Website designed to help IT pros advance their careers.vceplus. Note. All other traffic may use either link. If you want to check the routing information. one via a frame relay link and one via an EoMPLS link. Choose and configure the appropriate path selection feature to accomplish this task.3 R4(config-router)#end After finishing the configuration doesn’t forget to ping between R1 and R4 to make sure they work. QUESTION 81 You are a network engineer with ROUTE.

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Section: Layer 3 Technologies Explanation Explanation/Reference: Here are the step by Step Solution for this: 1) First create the access list that catches the HTTP traffic: R1(config)#access-list 101 permit tcp any any eq www 2) Configure the route map that sets the next hop address to be ISP1 and permits the rest of the traffic: R1(config)#route-map pbr permit 10 R1(config-route-map)#match ip address 101 R1(config-route-map)#set ip next-hop 10.Website designed to help IT pros advance their careers.1.100. .2 www.com .Correct Answer: Answer: We need to configure policy based routing to send specific traffic along a path that is different from the best path in the routing table.vceplus.

QUESTION 82 You are a network engineer with ROUTE.com . Two links have been added that will provide redundancy.Website designed to help IT pros advance their careers. You may not remove or change any of the configuration commands currently on any of the routers. The network requirements state that you must be able to ping and telnet from loopback 101 on R1 to the OPSF domain test address of 172. . The redundant paths from the OSPF network to the EIGRP network must be available in case of a link failure. A previous network engineer has started the merger implementation and has successfully assigned and verified all IP addressing and basic IGP routing. a small IT company. R4 has been added to the existing OSPF network to provide the interconnect between the OSPF and EIGRP networks. No static or default routing is allowed in either network. You have been tasked with completing the implementation and ensuring that the network requirements are met. They have recently merged two organizations and now need to merge their networks as shown in the topology exhibit.R1(config-route-map)#exit R1(config)#route-map pbr permit 20 3) Apply the route-map on the interface to the server in the EIGRP Network: R1(config-route-map)#exit R1(config)#int fa0/1 R1(config-if)#ip policy route-map pbr R1(config-if)#exit R1(config)#exit Explanation: First you need to configure access list to HTTP traffic and then configure that access list.1. You may add new commands or change default values. After that configure the route map and then apply it on the interface to the server in EIGRP network.100. One network is using OSPF as its IGP and the other is using EIGRP as its IGP.vceplus. All traffic must use the shortest path that provides the greatest bandwidth.com. www.16.

Correct Answer: Answer: First we need to find out 5 parameters (Bandwidth. Delay. Load.com . notice that we have to divide the Delay by 10 because the metric www. .Website designed to help IT pros advance their careers. Reliability.vceplus. MTU) of the s0/0/0 interface (the interface of R2 connected to R4) for redistribution: Section: Layer 3 Technologies Explanation Explanation/Reference: R2#show interface s0/0/0 Write down these 5 parameters.

we get Bandwidth=1544 Kbit. If the delay is 20000us then we need to divide it by 10. Reliability=255. Reliability=255. Note: The actual OPSF and EIGRP process numbers may change in the actual exam so be sure to use the actual correct values.16.1 network (the network behind R4) in the routing table of R1 and make a ping from R1 to this network. www. but the overall solution is the same.com . MTU=1500 bytes R3#config terminal R3(config)#router ospf 1 R3(config-router)#redistribute eigrp 100 metric-type 1 subnets R3(config)#exit R3(config-router)#router eigrp 100 R3(config-router)#redistribute ospf 1 metric 10000 100 255 1 1500 Finally you should try to “show ip route” to see the 172. MTU=1500 bytes then we would redistribute as follows: R2#config terminal R2(config)# router ospf 1 R2(config-router)# redistribute eigrp 100 metric-type 1 subnets R2(config-router)#exit R2(config-router)#router eigrp 100 R2(config-router)#redistribute ospf 1 metric 1544 2000 255 1 1500 Note: In fact.vceplus. that is 20000 / 10 = 2000) For R3 we use the show interface fa0/0 to get 5 parameters too R3#show interface fa0/0 For example we get Bandwidth=10000 Kbit. Load=1.unit is in tens of microsecond. these parameters are just used for reference and we can use other parameters with no problem. Load=1.Website designed to help IT pros advance their careers. Delay=20000 us. which is smaller than the Administrative Distance of OSPF (110) -> the link between R2 & R3 will be preferred to the serial link between R2 & R4. R2(config-router)# distance eigrp 90 105 This command sets the Administrative Distance of all EIGRP internal routes to 90 and all EIGRP external routes to 105. Note: If the link between R2 and R3 is FastEthernet link. For example.100. we must put the command below under EIGRP process to make traffic from R1 to go through R3 (R1 -> R2 -> R3 -> R4). Delay=1000 us. which is better than R1 -> R2 -> R4. .