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Certkiller 300-101 Casey 82q

Number: 300-101
Passing Score: 800
Time Limit: 120 min
File Version: 20.5

Exam Code: 300-101
Exam Name: Implementing Cisco IP Routing (ROUTE v2.0)

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: (none)
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).
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: (none)
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:
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
A network engineer notices that transmission rates of senders of TCP traffic sharply increase and decrease simultaneously during periods of congestion. Which
condition causes this?
A.
B.
C.
D.

global synchronization
tail drop
random early detection
queue management algorithm

Correct Answer: A
Section: (none)
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.
Routers on the Internet normally have packet queues, to allow them to hold packets when the network is busy, rather than discarding them.
Because routers have limited resources, the size of these queues is also limited. The simplest technique to limit queue size is known as tail drop. The queue is
allowed to fill to its maximum size, and then any new packets are simply discarded, until there is space in the queue again. This causes problems when used on
TCP/IP routers handling multiple TCP streams, especially when bursty traffic is present. While the network is stable, the queue is constantly full, and there are no
problems except that the full queue results in high latency. However, the introduction of a sudden burst of traffic may cause large numbers of established, steady
streams to lose packets simultaneously.
Reference: http://en.wikipedia.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.)
A.
B.
C.
D.
E.

starvation
jitter
latency
windowing
lower throughput

Correct Answer: ACE
Section: (none)
Explanation
Explanation/Reference:
Explanation:
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. Specifically, TCP transmitters will throttle-back flows when drops have been detected. Although some
UDP applications have application-level windowing, flow control, and retransmission capabilities, 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, then TCP flows will continually lower their rates, potentially giving up their
bandwidth to drop-oblivious UDP flows. This effect is called TCP-starvation/UDP-dominance. This can increase latency and lower the overall throughput.
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. Even if WRED is enabled on the service provider class, the same behavior would be observed, as WRED (for the
most part) only affects TCP-based flows. Granted, it is not always possible to separate TCP-based flows from UDP-based flows, but it is beneficial to be aware of
this behavior when making such application-mixing decisions. Reference: http://www.cisco.com/warp/public/cc/so/neso/vpn/vpnsp/spqsd_wp.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.
B.
C.
D.

dual-stack method
6to4 tunneling
GRE tunneling
NAT-PT

Correct Answer: A
Section: (none)
Explanation
Explanation/Reference:
Explanation:
Dual stack means that devices are able to run IPv4 and IPv6 in parallel. It allows hosts to simultaneously reach IPv4 and IPv6 content, so it offers a very flexible
coexistence strategy. For sessions that support IPv6, IPv6 is used on a dual stack endpoint. If both endpoints support IPv4 only, then IPv4 is used.
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, networks, and applications. Reference: http://www.cisco.com/web/strategy/docs/gov/IPV6at_a_glance_c45625859.pdf
QUESTION 6
Which statement about the use of tunneling to migrate to IPv6 is true?
A.
B.
C.
D.

Tunneling is less secure than dual stack or translation.
Tunneling is more difficult to configure than dual stack or translation.
Tunneling does not enable users of the new protocol to communicate with users of the old protocol without dual-stack hosts.
Tunneling destinations are manually determined by the IPv4 address in the low-order 32 bits of IPv4-compatible IPv6 addresses.

Correct Answer: C
Section: (none)
Explanation
Explanation/Reference:
Explanation:
Using the tunneling option, 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. The advantage of this approach is that the new protocol can work without disturbing the old protocol, thus providing connectivity
between users of the new protocol. Tunneling has two disadvantages, 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

B. F. · prefix/length--Any IP prefix.users of the old protocol without dual-stack hosts. D. B. Destination addresses are stored in the high-speed cache to expedite forwarding.cisco. which negates interoperability.html QUESTION 8 Which switching method is used when entries are present in the output of the command show ip cache? A.com/c/en/us/td/docs/ios/12_2/switch/command/reference/fswtch_r/xrfscmd5.) A. D.2.cisco. To display the routing table cache used to fast switch IP traffic.com/c/en/us/products/collateral/ios-nx-os-software/ enterprise-ipv6. The route options are as follows: *--All routes. Fast switching is enabled by default on all interfaces that support fast switching. Which two tables does this command clear and rebuild? (Choose two. Reference: http://www. use the following commands in any mode: Command Purpose clear ip route {* | {route | prefix/length}[next-hop interface]} [vrf vrf-name] Example: switch(config)# clear ip route 10.cisco. · route--An individual IP route. C. E. Routers offer better packet-transfer performance when fast switching is enabled.2 Clears one or more routes from both the unicast RIB and all the module FIBs. Reference: http://www.solution/white_paper_c11-676278. alphanumeric string up to 32 characters. fast switching process switching Cisco Express Forwarding switching cut-through packet switching Correct Answer: A Section: (none) 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.html #wp1038133 . IP routing FIB ARP cache MAC address table Cisco Express Forwarding table topology table Correct Answer: AB Section: (none) Explanation Explanation/Reference: Explanation: To clear one or more entries in the IP routing table. use the "show ip cache" EXEC command. The vrf-name can be any case-sensitive. C.html QUESTION 7 A network administrator executes the command clear ip route. Reference: http://www.2.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/unicast/5_0_3_N1_1/Cis co_n5k_layer3_ucast_cfg_rel_503_N1_1/l3_manage-routes. · next-hop--The next-hop address · interface--The interface to reach the next-hop address.

.) A. There is no performance impact when the feature is enabled but not used. Execute the command ip tcp window-size 65536.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. In order for this to work. the TCP time-stamp option is disabled. 2. With selective acknowledgment. Execute the command ip tcp adjust-mss.html#GUID-BD998AC6F128-47DD-B5F7-B226546D4B08 QUESTION 10 Which three TCP enhancements can be used with TCP selective acknowledgments? (Choose three. TCP Explicit Congestion Notification The TCP Explicit Congestion Notification (ECN) feature allows an intermediate router to notify end hosts of impending network congestion. Only packets 4 and 7 must be re-sent. TCP would receive acknowledgment of only packets 1. informing the sender of data that has been received. E. F. Use the ip tcp selective-ack command in global configuration mode to enable TCP selective acknowledgment. a TCP sender could learn about only one lost packet per-round-trip time. 3. the connection is considered dead and the device initiating the probes frees resources used by the TCP connection. C.3s/asr1000/iap-xe-3s-asr1000-book/iap-tcp.com/c/en/us/td/docs/ios-xml/ios/ipapp/configuration/xe. and 8. The TCP Window Scaling enhancement provides that support. If a response packet (a TCP ACK packet) is not received after the device sends a specific number of probes. and transfer of audio and video data that are sensitive to delay or packet loss. Execute the command ip tcp queuemax. It also provides enhanced support for TCP sessions associated with applications.html#GUID-22A82C5F-631F-43909838.) A. Refer to RFC 2018 for more details about TCP selective acknowledgment. B. Several SNMP traps are available: round trip time. Packets 4 through 8 would need to be re-sent. the remote host must also support this feature and its window size must be increased. Set TCP options to "enabled" on the remote host. 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. TCP selective acknowledgment is used only when multiple packets are dropped within one TCP window. TCP receives acknowledgment of packets 1. 5. The receiving TCP host returns selective acknowledgment packets to the sender. 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). The window size can increase to a scale factor of 14.QUESTION 9 Which two actions must you perform to enable and use window scaling on a router? (Choose two. Prior to selective acknowledgment. Reference: http://www. Use the ip tcp timestamp command to enable the TCP time-stamp option. The sender can then resend only missing data segments (instead of everything since the first missing packet). Typical applications use a scale factor of 3 when deployed in LFNs. The TCP Window Scaling feature complies with RFC 1323. such as Telnet. Correct Answer: AB Section: (none) Explanation Explanation/Reference: Explanation: The TCP Window Scaling feature adds support for the Window Scaling option in RFC 1323. Use the ip tcp ecn command in global configuration mode to enable TCP ECN. E. and 3. Reference: http://www. 6. Set window scaling to be used on the remote host. web browsing. TCP header compression will not compress the outgoing packet. TCP Time Stamp The TCP time-stamp option provides improved TCP round-trip time measurements. Use the ip tcp window-size command in global configuration mode to configure the TCP window size.com/c/en/us/td/docs/ios-xml/ios/ipapp/configuration/12-4t/iap-12-4t. The TCP selective acknowledgment mechanism helps improve performance. Each measurement operation can monitor against a pre-set performance threshold. the device sends a TCP keepalive packet to the peer with only the Acknowledgment (ACK) flag turned on. C. D. B. E. C. because of limited information available from cumulative acknowledgments. D. Prior to this feature. In other words. if TCP lost packets 4 and 7 out of an 8-packet window. Cisco IOS IP SLAs generates an SNMP trap to alert management applications if this threshold is crossed. Because the time stamps are always sent and echoed in both directions and the time-stamp value in the header is always changing. TCP Keepalive Timer The TCP Keepalive Timer feature provides a mechanism to identify dead connections. the receiver can acknowledge packets received out of order. B. D. Which UDP characteristic does this scenario describe? A.cisco.book/iap-tcp. An aggressive sender could choose to resend packets early. 2. latency starvation connectionless communication nonsequencing unordered packets jitter Correct Answer: A Section: (none) Explanation Explanation/Reference: Explanation: Cisco IOS IP SLAs provides a proactive notification feature with an SNMP trap. The larger scalable window size will allow TCP to perform better over LFNs. TCP Extensions for High Performance . To allow TCP header compression over a serial link. header compression explicit congestion notification keepalive time stamps TCP path discovery MTU window Correct Answer: BCD Section: (none) Explanation Explanation/Reference: Explanation: TCP Selective Acknowledgment The TCP Selective Acknowledgment feature improves performance if multiple packets are lost from one TCP window of data. but such re-sent segments might have already been successfully received. The benefit of this feature is the reduction of delay and packet loss in data transmissions.cisco. When a TCP connection on a routing device is idle for too long.

C. D. Correct Answer: B Section: (none) 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. Layer 2 Technologies QUESTION 13 Prior to enabling PPPoE in a virtual private dialup network group. Disable CDP on the interface. Execute the no switchport command. When TCP flows are combined with UDP flows within a single service-provider class and the class experiences congestion.cisco. never lower transmission rates because of dropping. 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: (none) 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. Execute the vpdn enable command. Enable QoS FIFO for PPPoE support. configure terminal 3.2(13)T. MOS.com/en/US/technologies/tk648/tk362/tk920/technologies_white_paper09186a008 02d5efe. Although some UDP applications have application-level windowing. D. Reference: http://www. B.com/c/en/us/td/docs/solutions/Enterprise/WAN_and_MAN/QoS_SRND/QoS. and retransmission capabilities. TCP transmitters throttle back flows when drops are detected. most UDP transmitters are completely oblivious to drops and. TCP flows continually lower their transmission rates. jitter. and connectivity tests. flow control. C. Even if WRED is enabled on the service-provider class.average jitter. 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.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 Topic 2. the same behavior would be observed because WRED (for the most part) manages congestion only on TCP-based flows. which task must be completed? A.html QUESTION 12 Under which condition does UDP dominance occur? A. Here is a partial sample output from the IP SLA statistics that can be seen: router#show ip sla statistics 1 Round Trip Time (RTT) for Index 55 Latest RTT: 1 ms Latest operation start time: *23:43:31. packet loss. one-way latency. SUMMARY STEPS enable 2. Restrictions This task applies only to releases prior to Cisco IOS Release 12.cisco. potentially giving up their bandwidth to UDP flows that are oblivious to drops. This effect is called TCP starvation/UDP dominance.SRND-Book/VPNQoS. Specifically. B. vpdn enable 4. thus.

E. The benefit of using CHAP authentication is that the remote device's password is never transmitted in clear text (encrypted). protocol pppoe DETAILED STEPS Command or Action Step 1 enable Example: Router> enable Enables privileged EXEC mode. The retrieved password should be the same password the remote device used in its encryption process. TCP Adjust B. and the random number. Step 6 protocol pppoe Example: Router(config-vpdn-req-in)# protocol pppoe Enables the VPDN subgroup to establish PPPoE Reference: http://www. authentication succeeds. it concatenates the ID. Dialer Persistent . The remote device sends the results back to the access server.html QUESTION 14 A network engineer has been asked to ensure that the PPPoE connection is established and authenticated using an encrypted password. Which feature can be used to accomplish this task? A. C. and then encrypts all of it using the remote device's password. the remote device's password. the two authentication options are PAP and CHAP. · Enter your password if prompted.com/c/en/us/td/docs/ios/12_2/security/configuration/guide/fsecur_c/scfathen. Reference: http://www.html QUESTION 15 A corporate policy requires PPPoE to be enabled and to maintain a connection with the ISP. the access server sends a CHAP packet to the remote device. This prevents other devices from stealing it and gaining illegal access to the ISP's network. Step 3 vpdn enable Example: Router(config)# vpdn enable Enables virtual private dialup networking. B. The access server then encrypts the concatenated information with the newly retrieved password--if the result matches the result sent in the response packet. When CHAP is enabled on an interface and a remote device attempts to connect to it.vpdn-group name 5. a random number.com/en/US/docs/ios/12_2t/12_2t2/feature/guide/ftpppoec_support_TSD_Island_o f_Content_Chapter. request-dialin 6. When the access server receives the response. Step 5 request-dialin Example: Router(config-vpdn)# request-dialin Creates a request-dialin VPDN subgroup. Step 2 configure terminal Example: Router# configure terminal Enters global configuration mode. in combination with PPPoE. Step 4 vpdn-group name Example: Router(config)# vpdn-group group1 Associates a VPDN group with a customer or VPDN profile. it uses the name it received to retrieve a password stored in its user database. The challenge packet consists of an ID. When the remote device receives the challenge packet. PAP dot1x IPsec CHAP ESP Correct Answer: D Section: (none) Explanation Explanation/Reference: Explanation: With PPPoE. Which technology. can be used for authentication in this manner? A. and the host name of the local router. along with the name associated with the password used in the encryption process.cisco. D. even if no interesting traffic exists.cisco. The CHAP packet requests or "challenges" the remote device to respond.

Step 2 Router(config-if)# ip address address mask Specifies the IP address and mask of the dialer interface as a node in the destination network to be called.com/c/en/us/support/docs/wan/point-to-point-protocol-ppp/10241-ppp. otherwise. Step 4 Router(config-if)# dialer string dial-string class class-name Specifies the remote destination to call and the map class that defines characteristics for calls to this destination. Step 9 Router(config-if)# dialer persistent [delay [initial] seconds | max-attempts number] Forces a dialer interface to be connected at all times. half-bridging E. MS CHAP CDPCP CHAP PAP Correct Answer: D Section: (none) Explanation Explanation/Reference: Explanation: PAP authentication involves a two-way handshake where the username and password are sent across the link in clear text. CHAP authentication.cisco. To configure a dialer interface as persistent. Step 7 Router(config-if)# dialer-list dialer-group protocol protocol-name {permit | deny | list access-list. Step 3 Router(config-if)# encapsulation type Specifies the encapsulation type. The host checks the response against its own calculation of the expected hash value. periodically verifies the identity of the remote node using a three-way handshake. The remote node responds with a value calculated using a one-way hash function. D.html QUESTION 16 Which PPP authentication method sends authentication information in cleartext? A.html QUESTION 18 What is the default OSPF hello interval on a Frame Relay point-to-point network? . or you can set a custom timer interval.C.number} Specifies an access list by list number or by protocol and list number to define the interesting packets that can trigger a call.com/c/en/us/td/docs/ios/dial/configuration/guide/12_4t/dia_12_4t_book/dia_dialer _persist. dialer persistent. Peer Neighbor Route Correct Answer: B Section: (none) Explanation Explanation/Reference: Explanation: A new interface configuration command. even in the absence of interesting traffic. C. Step 8 Router(config-if)# dialer remote-name user-name (Optional) Specifies the authentication name of the remote router on the destination subnetwork for a dialer interface. the connection is terminated. the authentication is acknowledged. If the values match. If interesting traffic arrives before the timer expires. Step 5 Router(config-if)# dialer pool number Specifies the dialing pool to use for calls to this destination. use the following commands beginning in global configuration mode: Command Purpose Step 1 Router(config)# interface dialer number Creates a dialer interface and enters interface configuration mode. allows a dial-on-demand routing (DDR) dialer profile connection to be brought up without being triggered by interesting traffic. After the PPP link is established. given its known DLCI. B. When configured. the dialer persistent command starts a timer when the dialer interface starts up and starts the connection when the timer expires. the connection is still brought up and set as persistent. Responses to Inverse ARP requests are entered in an address-to-DLCI mapping table on the router or access server.com/c/en/us/td/docs/ios/12_2/wan/configuration/guide/fwan_c/wcffrely.cisco. hence. D. PAP authentication does not provide any protection against playback and line sniffing. Frame Relay inverse ARP static DLCI mapping Frame Relay broadcast queue dynamic DLCI mapping Correct Answer: A Section: (none) Explanation Explanation/Reference: Explanation: Dynamic address mapping uses Frame Relay Inverse ARP to request the next-hop protocol address for a specific connection. Reference: http://www.html QUESTION 17 Which protocol uses dynamic address mapping to request the next-hop protocol address for a specific connection? A. Reference: http://www. PPPoE Groups D. Step 6 Router(config-if)# dialer-group group-number Assigns the dialer interface to a dialer group. B. on the other hand.cisco. Reference: http://www. The command provides a default timer interval. C.callin-hostname. the host sends a "challenge" message to the remote node. the table is then used to supply the next-hop protocol address or the DLCI for outgoing traffic.

com/c/en/us/td/docs/security/asa/asa92/configuration/vpn/asa-vpn. D. 10 20 30 40 Correct Answer: A Section: (none) Explanation Explanation/Reference: Explanation: Before you troubleshoot any OSPF neighbor-related issues on an NBMA network. Once the link setup is completed.cisco.html QUESTION 19 PPPoE is composed of which two phases? A.22. 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. it is important to remember that an NBMA network can be configured in these modes of operation with the ip ospf network command: The Hello and Dead Intervals of each mode are described in this table: Network Type Hello Interval (secs) Dead Interval (secs) Point-to-Point Point-to-Multipoint Broadcast Non-Broadcast Reference: http://www. 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. B. D. PPP options are negotiated and authentication is performed.com/c/en/us/td/docs/security/asa/asa92/configuration/vpn/asa-vpn. C.cli/vpn-pppoe. B. B. D. Layer 3 Technologies QUESTION 21 Refer to the exhibit.cisco. C.cisco. PPPoE functions as a Layer 2 encapsulation method that allows data to be encrypted over the PPP link within PPPoE headers.cli/vpn-pppoe.A. PPPoE functions as a Layer 4 encapsulation method that allows data to be transferred over the PPP link within PPPoE headers. PPP options are not negotiated and authentication is performed. PPP options are negotiated and authentication is not performed. PPPoE functions as a Layer 2 encapsulation method that allows data to be transferred over the PPP link within PPPoE headers. Correct Answer: D Section: (none) Explanation Explanation/Reference: Explanation: PPPoE is composed of two main phases: Reference: http://www. Once the link setup is completed. C.html Topic 3. 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: (none) Explanation Explanation/Reference: Explanation: PPPoE is composed of two main phases: Reference: http://www. .com/c/en/us/support/docs/ip/open-shortest-path-first-ospf/13693.

One example is noted above.0/24 cannot successfully ping users on the 10. C.Before the link-local address can be assigned to the interface. the address is a duplicate address and must not be used.autoconfiguration QUESTION 23 An engineer has configured a router to use EUI-64.0. it has IP-connectivity to other neighbors on this link. DHCPv6 request router-advertisement neighbor-solicitation redirect Correct Answer: B Section: (none) Explanation Explanation/Reference: Explanation: Autoconfiguration is performed on multicast-enabled links only and begins when a multicast. Nodes (both.0. hosts and routers) begin the process by generating a link-local address for the interface.0/8 network.0/8 network can successfully ping users on the 192.168. YOU won't know about the route and therefore won't send it to anyone else downstream.0. If routers are present. Traffic from the 172. The 10. a stateful configuration is required. If no routers are present. Hence.Once the node verifies that its tentative address is unique on the link.0/24 network.com/site/amitsciscozone/home/important-tips/ipv6/ipv6-stateless.google. Users on the 10. further tasks are performed only by the hosts. E.0.0/8 network will not be advertised by Router B because the network statement for the 10. The router has the following interface parameters: mac address C601.168.node multicast address corresponding to this tentative address.0.The next phase involves obtaining Router Advertisements from routers if any routers are present on the link.0. Correct Answer: E Section: (none) Explanation Explanation/Reference: Explanation: You can filter what individual routes are sent (out) or received (in) to any interface within your EIGRP configuration. The interface identifier replaces the right-most zeroes of the link-local prefix.0/8 network will not be in the routing table on Router B.0.16.0/16 network will be blocked by the ACL. The routers will need manual configuration (or stateful configuration) to receive site-local or global addresses. and was asked to document the IPv6 address of the router.420F. If you filter outbound.enabled interface is enabled (during system startup or manually). but users on the 192. The 10.Which one statement is true? A. it assigns that link-local address to the interface. Router B will not advertise the 10.0/16 route and therefore won't send it to anyone else downstream. manual configuration is required.5.16. Which message is required to obtain a global unicast address when a router is present? A. B. C.0. D. the next neighbor(s) will not know about anything except the 172. the node performs the Duplicate Address Detection mechanism to see if any other node is using the same link-local address on the link. It is formed by appending the interface identifier to wellknown link-local prefix FE80 :: 0.0/8 network is missing from Router B.5.The autoconfiguration on the routers stop at this stage. It does this by sending a Neighbor Solicitation message with target address as the "tentative" address and destination address as the solicited. D.0. If a node responds with a Neighbor Advertisement message with tentative address as the target address. At this stage. If you filter inbound.0007 subnet 2001:DB8:0:1::/64 Which IPv6 addresses should the engineer add to the documentation? . B.0. QUESTION 22 A router with an interface that is configured with ipv6 address autoconfig also has a link-local address assigned.0. Reference: https://sites.0/8 network because it is blocked by the ACL.0. the Router Advertisements notify what sort of configurations the hosts need to do and the hosts receive a global unicast IPv6 address.0.0.

The 16bit 0xFFFE is then inserted between these two 24-bits to for the 64-bit EUI address. with one being OUI (Organizationally Unique Identifier) and the other being NIC specific. allows a host to assign iteslf a unique 64-Bit IP Version 6 interface identifier (EUI-64).cisco. D. Correct Answer: C Section: (none) Explanation Explanation/Reference: Explanation: OSPFv3 uses link-local IPv6 addresses for neighbor discovery and other features. the globally unique addresses assigned by the IEEE has always been set to 0 whereas the locally created addresses has 1 configured. an IPv6 traffic filter was configured under various interfaces on the local router. B. The global anycast address must be added to the traffic filter to allow OSPFv3 to work properly. D. Here is an example showing how the Mac Address is used to generate EUI. the seventh bit from the left. The link-local addresses that were used by OSPFv3 were explicitly denied. the address is locally administered and if 1. as per RFC2373. 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. B. B. 2001:DB8:0:1:C601:42FF:FE0F:7 2001:DB8:0:1:FFFF:C601:420F:7 2001:DB8:0:1:FE80:C601:420F:7 2001:DB8:0:1:C601:42FE:800F:7 Correct Answer: A Section: (none) Explanation Explanation/Reference: Explanation: Extended Unique Identifier (EUI). This bit identifies whether this interface identifier is universally or locally administered. C. It sets the global BGP autonomous system number.com/document/100566/understanding-ipv6-eui-64-bit. What caused this issue? A. The reason for inverting can be found in RFC4291 section 2.1. It sets the global EIGRP autonomous system number. Reference: http://www. C. Reference: https://supportforums.0 A. shortly after implementing the traffic filter. or the universal/local (U/L) bit. which caused the neighbor relationships to fail. The traffic filter is blocking all ICMPv6 traffic. IEEE has chosen FFFE as a reserved value which can only appear in EUI-64 generated from the EUI-48 MAC address. Next.os/unicast/configuration/guide/l3_cli_nxos/l3_ospfv3.address QUESTION 24 1 For security purposes. Correct Answer: A Section: (none) Explanation . IPv6 traffic filtering can be implemented only on SVIs. However. It sets the BGP autonomous system number in a VRF.html QUESTION 25 What is the purpose of the autonomous-system {autonomous-system-number} command? A. The IPv6 EUI-64 format address is obtained through the 48-bit MAC address. C. the address is globally unique. It sets the EIGRP autonomous system number in a VRF. If 0. when the bit is inverted. 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. needs to be inverted.cisco. it maintains its original scope (global unique address is still global unique and vice versa).com/c/en/us/td/docs/switches/datacenter/sw/5_x/nx. The Mac address is first separated into two 24-bits. Therefore.5. OSPFv3 neighbor adjacencies were lost. D.

switch ports to accept DHCP packets that include option-82 information. autonomous-system autonomous-system-number no autonomous-system autonomous-system-number Reference: http://www. use the no form of this command. · The switch receives a packet on an untrusted interface.com/c/en/us/td/docs/ios/iproute_eigrp/command/reference/ire_book/ire_a1.html QUESTION 27 Refer to the exhibit. and the interface information in the binding table does not match the interface on which the message was received.cisco. use the autonomous-system command in address-family configuration mode. you can enable the DHCP option-82 on untrusted port feature.cisco. Configure the port on the edge switch that connects to the aggregation switch as a trusted port.html# wp1062796 2 QUESTION 26 Which type of traffic does DHCP snooping drop? A. 3 . DHCPNAK.0. C. or DHCPLEASEQUERY packet) from a DHCP server outside the network or firewall. · The switch receives a DHCP packet that includes a relay agent IP address that is not 0. To remove the autonomous-system for an EIGRP routing process from within a VPN VRF instance. 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. which enables untrusted aggregation. D. Reference: http:// www.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12. · The switch receives a DHCPRELEASE or DHCPDECLINE message from an untrusted host with an entry in the DHCP snooping binding table.0.0. discover messages DHCP messages where the source MAC and client MAC do not match traffic from a trusted DHCP server to client DHCP messages where the destination MAC and client MAC do not match Correct Answer: B Section: (none) Explanation Explanation/Reference: Explanation: The switch validates DHCP packets received on the untrusted interfaces of VLANs with DHCP snooping enabled.2SX/configuration/guide/book/snoodhcp. To support trusted edge switches that are connected to untrusted aggregation-switch ports.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. B. and the source MAC address and snooping MAC address verification option is turned on. DHCPACK.

C. D.1. Only the choice of 10.0.0/16 10.0.0.Which command only announces the 1.8. The networks were not advertised properly under the OSPFv3 process.8.2. D.8.x. Why is the routing information not being learned by Router B? A. distribute list 1 out distribute list 1 out FastEthernet0/0 distribute list 2 out distribute list 2 out FastEthernet0/0 Correct Answer: D Section: (none) Explanation Explanation/Reference: Explanation: Access list 2 is more specific.9.0. B. B. This question also asks us to apply this distribute list only to the outbound direction of the fast Ethernet 0/0 interface. allowing only 1. The networks that are advertised from Router A do not show up in Router B's routing table. the message "not a router" is found in the output. where X is any value in the 0-255 range. An IPv6 traffic filter is blocking the networks from being learned via the Router B interface that is connected to Router A.24 matches this.0/24 network out of FastEthernet 0/0? A. After debugging IPv6 packets. so only a /24 is both greater than or equal to 24 and less than or equal to 24.0. whereas access list 1 permits all 1.0.8. D. C. .0. the ge 24 term means greater than or equal to a /24 and the le 24 means less than or equal to /24. IPv6 unicast routing is not enabled on Router A or Router B.0/24. 4 QUESTION 29 Router A and Router B are configured with IPv6 addressing and basic routing capabilities using OSPFv3.0. so the correct command is "distribute list 2 out FastEthernet0/0.3.0/8 networks.0/16 ge 24 le 24? A. C.0/24 10.0/23 Correct Answer: B Section: (none) Explanation Explanation/Reference: Explanation: With prefix lists. This translate to any prefix in the 10.0/24 network.8.0/24 10." QUESTION 28 Which prefix is matched by the command ip prefix-list name permit 10. B.8.3.2. OSPFv3 timers were adjusted for fast convergence. 10.

E. the globally unique addresses assigned by the IEEE has always been set to 0 whereas the locally created addresses has 1 configured. C. Here is an example showing how a the Mac Address is used to generate EUI.cisco. Based on this information. The IPv6 universal/local flag (bit 7) was flipped. Next. needs to be inverted. The IPv6 EUI-64 format address is obtained through the 48-bit MAC address. format errors Errors that can result from checks performed on header fields. when the bit is inverted. IEEE EUI-64 was implemented when assigning IPv6 addresses on the device. Reference: http://www. The 16bit 0xFFFE is then inserted between these two 24-bits to for the 64-bit EUI address. with one being OUI (Organizationally Unique Identifier) and the other being NIC specific. IEEE has chosen FFFE as a reserved value which can only appear in EUI-64 generated from the an EUI-48 MAC address.5. it maintains its original scope (global unique address is still global unique and vice versa). as per RFC2373.Correct Answer: D Section: (none) Explanation Explanation/Reference: Explanation: show ipv6 traffic Field Descriptions Field Description source-routed Number of source-routed packets. The Mac address is first separated into two 24-bits.1. the address is globally unique. truncated Number of truncated packets. The reason for inverting can be found in RFC4291 section 2. and packet length.html QUESTION 30 After you review the output of the command show ipv6 interface brief. not a router Message sent when IPv6 unicast routing is not enabled. you see that several IPv6 addresses have the 16-bit hexadecimal value of "FFFE" inserted into the address. 5 B. D. Correct Answer: A Section: (none) Explanation Explanation/Reference: Explanation: Extended Unique Identifier (EUI). or the universal/local (U/L) bit. the address is locally administered and if 1. It is worth noticing that in the OUI portion. Therefore. If 0. This feature is a key benefit over IPv4 as it eliminates the need of manual configuration or DHCP as in the world of IPv4. the seventh bit from the left. 6 . This bit identifies whether this interface identifier is universally or locally administered. what do you conclude about these IPv6 addresses? A. but IPv6 Cisco Express Forwarding was disabled. allows a host to assign iteslf a unique 64-Bit IP Version 6 interface identifier (EUI-64).com/c/en/us/td/docs/ios/ipv6/command/reference/ipv6_book/ipv6_16. IPv6 addresses containing "FFFE" indicate that the address is reserved for multicast. The addresses were misconfigured and will not function as intended. the version number. IPv6 unicast forwarding was enabled.

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: (none)
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
7
router solicitation messages is the 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
CORRECT TEXT
Route.com is a small IT corporation that is attempting to implement the network shown in the exhibit. Currently the implementation is partially completed. OSPF has
been configured on routers Chicago and NewYork. The SO/O interface on Chicago and the SO/1 interface on NewYork are in Area 0. The loopbackO interface on
NewYork is in Area 1. However, they cannot ping from the serial interface of the Seattle router to the loopback interface of the NewYork router. You have been
asked to complete the implementation to allow this ping.
ROUTE.com's corporate implementation guidelines require:
· The OSPF process ID for all routers must be 10.
· The routing protocol for each interface must be enabled under the routing process.
· The routing protocol must be enabled for each interface using the most specific wildcard mask 8
possible.
·The serial link between Seattle and Chicago must be in OSPF area 21.
·OSPF area 21 must not receive any inter-area or external routes.
Network Information
Seattle
S0/0 192.168.16.5/30 - Link between Seattle and Chicago
Secret Password: cisco
Chicago
S0/0 192.168.54.9/30 - Link between Chicago and NewYork
S0/1 192.168.16.6/30 - Link between Seattle and Chicago Secre
Password: cisco
NewYork
S0/1 192.168.54.10/30 - Link between Chicago and NewYork
Loopback0 172.16.189.189
Secret Password: cisco

9

255. First. D.252 Here subtract 252 from 2565. hence the subnets will increment by 4.255. IP Address: 192. C. OSPF areas and process ID. we need to find the network address and wildcard mask of 192. but the overall solution is the same. So.168.16.16.5 /30 Subnet Mask: 255.5/30 in order to configure the OSPF.168. 256-252 = 4. Seattle's S0/0 IP Address is 192.16.A. Correct Answer: Section: (none) Explanation Explanation/Reference: Answer: Here is the solution below: Explanation: Note: In actual exam.168. and router hostnames may change.5/30. find the 4th octet of the Network Address: . the IP addressing. B.

16.16.The 4th octet of IP address (192. Host Bits 0's) Lets find the wildcard mask of /30.7 Lets find the wildcard mask of /30.168. Subnet Mask: (Network Bits 1's.5) belongs to subnet 1 (4 to 7).16.168. Network Address: 192.4 Broadcast Address: 192. .168.

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. we must stop LSA Type 5 if we don't want to send external routes. area 21 should not receive any external or inter-area routes (except the default route). 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. You have corrected the fault when pings from R2 to the R3 LAN interface are successful. as well as the New York router so there is nothing that needs to be done on that router. and the R3 IP routing table only contains 2 10.0.0. And if we don't want to send inter-area routes. Therefore we want to configure area 21 as a totally stubby area.0.168. and R4 in the network. . Your task is to identify and resolve the cause of connectivity failure with the remote office router R3.3 area 21 Again. Once the issue has been resolved you should complete the task by configuring route summarization only to the remote office router R3. Another network professional was tasked with implementing this solution.16.0. QUESTION 33 CORRECT TEXT JS Industries has expanded their business with the addition of their first remote office.0.0 subnets.4 0. The remote office router (R3) was previously configured and all corporate subnets were reachable from R3.4 0. However. R3. Currently EIGRP is configured on all routers R2.168. we have to stop LSA Type 3 and Type 4.3 area 21 One of the tasks states that area 21 should not receive any external or inter-area routes (except the default route).0.Now we configure OSPF using process ID 10 (note the process ID may change to something else in real exam). Seattle>enable Password: Seattle#conf t Seattle(config)#router ospf 10 Seattle(config-router)#network 192. 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 Chicago(config-router)#network 192. in the process of configuring EIGRP stub routing connectivity with the remote network devices off of R3 has been lost.16. In order to accomplish this.

.

A. .

0 network. Notice that R3 is configured as a stub receive-only router.0. Correct Answer: Section: (none) Explanation Explanation/Reference: Answer: Here are the solution as below: Explanation: First we have to figure out why R3 and R4 can not communicate with each other. Use the show ip route command on R3 to view its routing table: . Next we will configure router R3 so that it has only 2 subnets of 10. 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.B. Use the show running-config command on router R3. The receive-only keyword will restrict the router from sharing any of its routes with any other router in that EIGRP autonomous system. C. D. This keyword will also prevent any type of route from being sent.0. Notice that the eigrp stub command equals to the eigrp stub connected summary because the connected and summary options are enabled by default.

0.255.0.0.0 255.0. to make the routing table of R3 has only 2 subnets we have to summary other subnets into one subnet.2.0. Just for your information. we will use the ip summary-address eigrp 123 10. In conclusion. which is a directly connected network of R3.0 255. notice that if you use another network than 10.255. the s0/0 interface of R4. the output is shown below: 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.0.0/24..networks at the interface which is connected with R3.0.2.3.2. There is one interesting thing about the output of the show ip route shown above: the 10.0/8 is a summary.255. if you use the command ip summary-address eigrp 123 10.0..0.0 so that all the ping can work well. Therefore.0 you will leave a /16 network in the output of the show ip route command.0/8 to summary.0 Now we jump back to R3 and use the show ip route command to verify the effect. R4> enable R4# conf t R4(config)# interface s0/0 R4(config-if)# ip summary-address eigrp 123 10.0 at the interface s0/0 of R4 to summary.0.0. .2.0. for example.) then we should use the command ip summary-address eigrp 123 10.255. We can't get rid of it in the routing table no matter what technique we use to summary the networks.0 255.Because we want the routing table of R3 only have 2 subnets so we have to summary sub. In the output if we don't see the summary line (like 10.2.0 255.

Null0" then you can summarize using the network 10.0/16." QUESTION 34 CORRECT TEXT ROUTE. This summarization is better because all the pings can work well. if you don't see the line "10. Special Note: To gain the maximum number of points you must remove all incorrect or unneeded configuration statements related to this issue. However. R3(config-if)# end 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. .0/8 is a summary. 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.But in your real exam. 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.com is a small IT corporation that has an existing enterprise network that is running IPv6 0SPFv3.2.0.0. Finally don't forget to use the copy run start command on routers R3 and R4 to save the configurations. R4's loopback address (FEC0:4:4) cannot be seen in R1's IPv6 routing table. Currently OSPF is configured on all routers.0.

.

.

A. D. C. first issue the show running-config on all of 4 routers. Correct Answer: Section: (none) Explanation Explanation/Reference: Answer: Here is the solution below: Explanation: To troubleshoot the problem. B. Pay more attention to the outputs of routers R2 and R3 The output of the "show running-config" command of R2: The output of the "show running-config" command of R3: .

4"): R3>enable R3#configure terminal R3(config)#ipv6 router ospf 1 R3(config-rtr)#no area 54 virtual-link 4. IT policy requires that all outbound HTTP traffic use the frame relay link when it is available.com.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. The area through which you configure the virtual link is known as a transit area. Note. a small IT company.3.3. 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 some cases.2. we can use a virtual link to connect to the backbone through a non-backbone area.3. No static or default routing is allowed. use the show ipv6 route command.4 R3(config-rtr)#area 11 virtual-link 2. R4(config)#ipv6 router ospf 1 R4(config-router)#no area 54 virtual-link 3. If you want to check the routing information.3.3.3.3. one via a frame relay link and one via an EoMPLS link. + Configure virtual link on R2 (from the first output above.2.2 Save the configuration: R3(config-rtr)#end R3#copy running-config startup-config You should check the configuration of R4. too. Make sure to remove the incorrect configuration statements to get the full points.4.We knew that all areas in an Open Shortest Path First (OSPF) autonomous system must be physically connected to the backbone area (Area 0). 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. ROUTE.4.4. routers R2 and R3 must be configured with the area <area id> virtuallink <neighbor router-id>command. not "show ip route". In this case.2) + Configure virtual link on R3 (from the second output above.2. All other traffic may use either link. QUESTION 35 CORRECT TEXT You are a network engineer with ROUTE. Therefore. where this is not possible. .com has two connections to the Internet.3 R4(config-router)#end After finishing the configuration doesn't forget to ping between R1 and R4 to make sure they work. not R2's router-id 2. the area 11 will become the transit area.2.

You may use the Test Workstation to generate HTTP traffic to validate your solution. A. .Choose and configure the appropriate path selection feature to accomplish this task.

QUESTION 36 CORRECT TEXT You are a network engineer with ROUTE. Two links have been added that will provide redundancy. No static or default routing is allowed in either network.16. R4 has been added to the existing OSPF network to provide the interconnect between the OSPF and EIGRP networks. You may add new commands or change default values.100. A. C. C. All traffic must use the shortest path that provides the greatest bandwidth. 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. 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. Correct Answer: Section: (none) Explanation . After that configure the route map and then apply it on the interface to the server in EIGRP network. You may not remove or change any of the configuration commands currently on any of the routers. Correct Answer: Section: (none) Explanation Explanation/Reference: 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. One network is using OSPF as its IGP and the other is using EIGRP as its IGP.2 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. B. 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.B. They have recently merged two organizations and now need to merge their networks as shown in the topology exhibit. You have been tasked with completing the implementation and ensuring that the network requirements are met.1. D.1.com. The redundant paths from the OSPF network to the EIGRP network must be available in case of a link failure.100. D.

Delay=20000 us. 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 172.100.1 network (the network behind R4) in the routing table of R1 and make a ping from R1 to this network. For example. but the overall solution is the same. notice that we have to divide the Delay by 10 because the metric unit is in tens of microsecond. which is better than R1 -> R2 -> R4. 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. Note: The actual OPSF and EIGRP process numbers may change in the actual exam so be sure to use the actual correct values. Delay=1000 us. If the delay is 20000us then we need to divide it by 10. these parameters are just used for reference and we can use other parameters with no problem. Reliability. Load=1. QUESTION 37 You have been asked to evaluate how EIGRP is functioning in a customer network. we get Bandwidth=1544 Kbit. . 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. MTU) of the s0/0/0 interface (the interface of R2 connected to R4) for redistribution: R2#show interface s0/0/0 Write down these 5 parameters.Explanation/Reference: Answer: First we need to find out 5 parameters (Bandwidth. we must put the command below under EIGRP process to make traffic from R1 to go through R3 (R1 -> R2 -> R3 -> R4). Delay. Note: If the link between R2 and R3 is FastEthernet link. Reliability=255. Load=1.16. 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. 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. Load. Reliability=255.

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B. C. D. 1:1 1:5 6:8 19:80 Correct Answer: D Section: (none) Explanation Explanation/Reference: Explanation: First.R6 paths.Traffic from R1 to R61 s Loopback address is load shared between R1-R2-R4-R6 and R1-R3-R5. find the IP address of the loopback0 interface on R6: . What is the ratio of traffic over each path? A.

1.We see that it is 150.1.6.6" command from R1 and see this: .6. so we issue the "show ip route 150.6.

and 80 for the second path. .Notice the "traffic share count" shows 19 for the first path. QUESTION 38 You have been asked to evaluate how EIGRP is functioning in a customer network.

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B. D. Distribute-list using an ACL Distribute-list using a prefix-list Distribute-list using a route-map An ACL using a distance of 255 Correct Answer: A Section: (none) Explanation Explanation/Reference: Explanation: The configuration on R6 is as follows: . C.What type of route filtering is occurring on R6 A.

QUESTION 39 You have been asked to evaluate how EIGRP is functioning in a customer network.This is a standard distribute list using access list number 1. .

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B.Which key chain is being used for authentication of EIGRP adjacency between R4 and R2? A. C. D. CISCO EIGRP key MD5 Correct Answer: A Section: (none) Explanation Explanation/Reference: Explanation: R4 and R2 configs are as shown below: .

Clearly we see the actual key chain is named CISCO. . QUESTION 40 You have been asked to evaluate how EIGRP is functioning in a customer network.

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46. D.0 network on R1? A. C.What is the advertised distance for the 192. B.168. 333056 1938688 1810944 307456 Correct Answer: C Section: (none) Explanation Explanation/Reference: Explanation: R1's routing table is as follows .

QUESTION 41 You have been asked to evaluate how EIGRP is functioning in a customer network.168. which is shows as 1810944 for the 192.0 route. .The numbers after the route specify the administrative distance of the route (90 for EIGRP) and the distance metric of that particular route.46.

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10 20 30 40 Correct Answer: B Section: (none) Explanation Explanation/Reference: Explanation: The relevant configuration of R1 is shown below: .What percent of R1's interfaces bandwidth is EIGRP allowed to use? A. B. C. D.

The customer has disabled your access to the show runningconfig command.ip bandwidth-percent eigrp 1 20 1 = the EIGRP AS 20 = 20% of the bandwidth QUESTION 42 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. .

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B. 1858 1601 600 1569 Correct Answer: A Section: (none) Explanation Explanation/Reference: Explanation: Part of the "show ip ospf topology" command on R5 shows this: .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. C. D.

The customer has disabled your access to the show running. QUESTION 43 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.The Link ID of R3 (3. .3.3.3) shows the age is 1858.config command.

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Correct Answer: B Section: (none) Explanation Explanation/Reference: Explanation: We can see the configured timers using the following command: . 120. The R1-R3 link needs the neighbor command for the adjacency to stay up The R2-R3 link OSPF timer values are 30. 120 The R1-R3 link OSPF timer values should be 10.40 R3 is responsible for flooding LSUs to all the routers on the network. D.Which of the following statements is true about the serial links that terminate in R3 A. B.40. C.

.config command.QUESTION 44 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. The customer has disabled your access to the show running.

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D. 1 5 9 20 54 224 Correct Answer: C Section: (none) Explanation Explanation/Reference: Explanation: This can be found using the "show ip ospf" command on R4. C. Look for the Area 1 stats which shows this: . B.How many times was SPF algorithm executed on R4 for Area 1? A. E. F.

QUESTION 45 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. The customer has disabled your access to the show running.config command. .

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Areas of Router 5 and 6 are not normal areas, inspect their routing tables and determine which statement is true?
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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

Correct Answer: A
Section: (none)
Explanation
Explanation/Reference:
Explanation:
Here are the routing tables of R5 and R6:

255.161.1 tunnel-mode dynamic Correct Answer: A Section: (none) Explanation Explanation/Reference: Explanation: The configuration of mGRE allows a tunnel to have multiple destinations. An mGRE interface does not have a configured destination. effectively they have the tunnel mode gre command.224 tunnel source 209.201. The distinguishing feature between an mGRE interface and a p2p GRE interface is the tunnel destination.201.x.x found with p2p GRE tunnels. The mGRE configuration is as follows: ! interface Tunnel0 bandwidth 1536 . interface Tunnel0 bandwidth 1536 ip address 209.165. Besides allowing for multiple destinations. This command is used instead of the tunnel destination x. Note.255.255. Instead the GRE tunnel is configured with the command tunnel mode gre multipoint.255.224 tunnel source Serial0/0 tunnel mode gre multipoint B. which is not seen in the configuration because it is the default.1 tunnel-mode dynamic D.165.255. a p2p GRE tunnel may connect to an mGRE tunnel. Which interface configuration output can be applied to the corporate router to allow communication to the remote sites? A.255.point (p-p) using GRE encapsulation.224 tunnel mode gre multipoint C.165. This means that an mGRE tunnel on the hub may connect to a p2p tunnel on the branch.230 255.165. VPN Technologies QUESTION 46 A company has just opened two remote branch offices that need to be connected to the corporate network.231 255. an mGRE tunnel requires NHRP to resolve the tunnel endpoints. interface fa0/0 bandwidth 1536 ip address 209.2 tunnel destination 209. 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.200.255. Conversely. interface Tunnel0 bandwidth 1536 ip address 209.231 255.x.224 tunnel source 192.168. tunnel interfaces by default are point-to.200.Topic 4. interface fa 0/0 bandwidth 1536 ip address 209.230 255.165.255.200.200.165.

12.0/255.1. The encrypted tunnel is built between 12.1.1111. tunnel 100 created 0:00:43 expire 1:59:16 Type: dynamic Flags: authoritative NBMA address: 10.255.10 255.0 and 10.2 255. #pkts compr.1.1.0. The mapping entry was created in response to an NHRP registration request. #send errors 1.0/0/0) current_peer: 12.: 12.2. #recv errors 0 local crypto endpt. } slot: 0.1.1111. Correct Answer: A Section: (none) Explanation Explanation/Reference: Explanation: Show NHRP: Examples The following is sample output from the show ip nhrp command: Router# show ip nhrp 10.255. conn id: 3442.255. remote crypto endpt. inbound crypto map remaining key lifetime path MTU tagged packets untagged packets invalid identity packets Correct Answer: ABC Section: (none) Explanation Explanation/Reference: Explanation: show crypto ipsec sa This command shows IPsec SAs built between peers.1111.1.2 What does the authoritative flag mean in regards to the NHRP information? A. NHRP mapping is for networks that are local to this router.1. interface: FastEthernet0 Crypto map tag: test.com/c/en/us/td/docs/solutions/Enterprise/WAN_and_MAN/DMVPDG/DMVPN_2_ Phase2. #pkts decompressed: 0 #pkts not compressed: 0. E. failed: 0.2 The fields in the sample display are as follows: .1.1111. The NHRP mapping entry cannot be overwritten. expire 01:59:47 TypE. B.255.1.1.) A.0.255. C. #pkts verify 7760382 #pkts compressed: 0.2 path mtu 1500.1.1.cisco. #pkts digest 7767918 #pkts decaps: 7760382.1. Tunnel1 created 00:00:12.1. B. media mtu 1500 current outbound spi: 3D3 inbound esp sas: spi: 0x136A010F(325714191) transform: esp-3des esp-md5-hmac . crypto map: test sa timing: remaining key lifetime (k/sec): (4608000/52) IV size: 8 bytes replay detection support: Y outbound ah sas: outbound pcp sas: Reference: http://www.255.1111.2.0.1. crypto map: test sa timing: remaining key lifetime (k/sec): (4608000/52) IV size: 8 bytes replay detection support: Y inbound ah sas: inbound pcp sas: inbound pcp sas: outbound esp sas: spi: 0x3D3(979) transform: esp-3des esp-md5-hmac .: 12. flow_id: 1444.1 and 12. E. conn id: 3443.1111.1111.1. flags={origin_is_acl.0 tunnel source Serial0/0 tunnel mode gre multipoint Reference: http://www.cisco. in use settings ={Tunnel. #pkts decrypt: 7760382.1111. #pkts encrypt: 7767918.2/8 via 10.255.2 for traffic that goes between networks 20. flow_id: 1443. F.0.1.1 255. It was obtained directly from the next-hop server.protocols/5409-ipsec-debug-00. local addr.255.0. D.1.1.1. Authentication Header (AH) is not used since there are no AH SAs.0/255.1 local ident (addr/mask/prot/port): (20. This output shows an example of the show crypto ipsec sa command (bolded ones found in answers for this question). Data packets are process switches for this mapping entry.12. Tunnel0 created 0:10:03 expire 1:49:56 Type: static Flags: authoritative NBMA address: 10.1. D.1. #pkts decompress failed: 0. } slot: 0.255.1111.62.html QUESTION 48 Refer to the following output: Router#show ip nhrp detail 10.255.1. dynamic.html QUESTION 47 A network engineer executes the show crypto ipsec sa command. in use settings ={Tunnel.2 PERMIT.} #pkts encaps: 7767918.255.1. Which three pieces of information are displayed in the output? (Choose three.ip address 10.1.255.0/0/0) remote ident (addr/mask/prot/port): (10.1.1. C.com/c/en/us/support/docs/security-vpn/ipsec-negotiation-ike.11 10.1. Flags: authoritative unique nat registered used NBMA address: 10. You can see the two Encapsulating Security Payload (ESP) SAs built inbound and outbound.

static--NBMA address was statically configured.255.html QUESTION 49 Which common issue causes intermittent DMVPN tunnel flaps? A. This value is based on the ip nhrp holdtime command.com/c/en/us/support/docs/securityvpn/ipsec-negotiation-ike. 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: (none) Explanation Explanation/Reference: Explanation: DMVPN Tunnel Flaps Intermittently Problem DMVPN tunnel flaps intermittently.cisco. C. D.protocols/29240-dcmvpn. Solution When DMVPN tunnels flap. · The time in which the positive and negative authoritative NBMA address will expire (hours:minutes:seconds). · Flags: authoritative--Indicates that the NHRP information was obtained from the Next Hop Server "Pass Any or router that maintains the NBMA-to-IP address mapping for a particular destination.255 because Cisco does not support aggregation of NBMA information through NHRP.html#Prblm1 QUESTION 50 Which encapsulation supports an interface that is configured for an EVN trunk? . The mask is always 255. check the neighborship between the routers as issues with neighborship formation between routers may cause the DMVPN tunnel to flap. make sure the neighborship between the routers is always up. In order to resolve this problem. · Type of interface: dynamic--NBMA address was obtained from the NHRP Request packet.cisco.The IP address and its network mask in the IP-to-NBMA address cache.com/c/en/us/td/docs/ios/12_4/ip_addr/configuration/guide/hadnhrp. · The interface type and number and how long ago it was created (hours:minutes:seconds). B. Reference: http://www. Reference: http://www.255.

Without a previously installed client. DMVPN is initially configured to build out a hub-and-spoke network by statically configuring the hubs (VPN headends) on the spokes.pdf QUESTION 52 A user is having issues accessing file shares on a network. you cannot configure VRF-Lite on the same interface. This dynamic-mesh capability alleviates the need for any load on the hub to route data between the spoke networks. E. B. dynamic routing protocol. mGRE. 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. · OSPFv3 is not supported. After downloading.1Q ISL PPP Frame Relay MPLS HDLC Correct Answer: A Section: (none) Explanation Explanation/Reference: Explanation: Restrictions for EVN · An EVN trunk is allowed on any interface that supports 802.overview. The network engineer advises the user to open a web browser. F. C. NHRP. including IPsec (Internet Protocol Security) and ISAKMP (Internet Security Association and Key Management Protocol) peers.and-spoke network. D. the client installs and configures itself. it downloads the client that matches the operating system of the remote computer.A. tunnels between spokes can be dynamically built on demand (dynamic-mesh) without additional configuration on the hubs or spokes. NHRP and IPsec.html QUESTION 53 Which Cisco IOS VPN technology leverages IPsec. DMVPN is combination of the following technologies: Reference: http://en. thereby enabling support for overlapping IP addresses across multiple EVNs. B. D. establishes a secure SSL connection and either remains or uninstalls itself (depending on the security appliance configuration) when the connection terminates. and port channels. OSPFv2 is supported. and the security appliance identifies the user as requiring the client. C.cisco. · A single IP infrastructure can be virtualized to provide up to 32 virtual networks end-to-end. Which type of remote access did the engineer enable? A. Reference: http://www. Reference: http://www.book/evn-overview. Gigabit Ethernet. IP address routing table forwarding table access control lists NetFlow configuration Correct Answer: ABC Section: (none) Explanation Explanation/Reference: Explanation: A trunk interface can carry traffic for multiple EVNs. and follow the instructions.org/wiki/Dynamic_Multipoint_Virtual_Private_Network . no change in the configuration on the hub is required to accept new spokes.generation-firewalls/100936-asa8x-split-tunnel-anyconnect-config.) A.cisco. Unless the security appliance is configured to redirect http:// requests to https://. all the subinterfaces and associated EVNs have the same IP address assigned. such as Fast Ethernet. After entering the URL. If the user satisfies the login and authentication. input a prescribed IP address. D. FlexVPN DMVPN GETVPN Cisco Easy VPN Correct Answer: B Section: (none) 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. Reference: http://www. In other words. C. D. remote users enter the IP address in their browser of an interface configured to accept SSL VPN connections. After doing this. EZVPN IPsec VPN client access VPDN client access SSL VPN client access Correct Answer: D Section: (none) Explanation Explanation/Reference: Explanation: The Cisco AnyConnect VPN Client provides secure SSL connections to the security appliance for remote users. users must enter the URL in the form https://<address>.1q encapsulation. the user is able to access company shares. GRE. and Cisco Express Forwarding? A.com/en/US/docs/ios-xml/ios/evn/configuration/xe-3sg/evn.com/c/en/us/td/docs/ios-xml/ios/evn/configuration/xe-3s/evn-xe-3s.com/c/en/us/support/docs/security/asa-5500-x-series-next. To simplify the configuration process. the browser connects to that interface and displays the login screen. 802. B. B.pdf QUESTION 51 Which three characteristics are shared by subinterfaces and associated EVNs? (Choose three. · If an EVN trunk is configured on an interface. This is accomplished as a result of each EVN having a unique routing and forwarding table. Using this initial hub. E. the trunk interface is identified by the same IP address in different EVN contexts.wikipedia.cisco.

IPv6 access list has just one entry. D. For example. which method can you use in combination with the "debug ip packet" command to limit the amount of output data? A. QUESTION 55 For troubleshooting purposes. D. Unfortunately.com/en/US/docs/ios/12_2/security/configuration/guide/scfrpf. B. Correct Answer: C Section: (none) Explanation Explanation/Reference: Explanation: Logging-enabled access control lists (ACLs) provide insight into traffic as it traverses the network or is dropped by network devices. A packet that matches access-list with the "log" keyword is process switched. Reference: http://www. This command should be used with caution in production networks. Reference: http://www. B.com/c/en/us/ support/docs/security/dynamic-multipoint-vpn. You can use the KRON scheduler. access-list 100 permit ip any any log After applying the access list on a Cisco router. C.cisco. This action protects the network of the ISP. which allows only the single IPv6 IP address of 2001:DB8:0:4::32 to connect using SSH only. Reference: http://www. a number of common types of denial-of-service (DoS) attacks. including Smurf and Tribal Flood Network (TFN). Always use with the access-list command to apply an extended ACL to the debug output. D.cisco. its customer. Infrastructure Security QUESTION 54 Which traffic does the following configuration allow? ipv6 access-list cisco permit ipv6 host 2001:DB8:0:4::32 any eq ssh line vty 0 4 ipv6 access-class cisco in A. C.Topic 5. B. E. What is the reason for this? A. You can use an IOS parser. For Internet service providers (ISPs) that provide public access. 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.dmvpn/111976-dmvpn-troubleshoot-00.html#4 QUESTION 57 Which address is used by the Unicast Reverse Path Forwarding protocol to validate a packet against the routing table? A. You can disable the IP route cache globally.com/web/about/security/intelligence/acl-logging.html . source address destination address router interface default gateway Correct Answer: A Section: (none) 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. C. A large amount of IP traffic is being permitted on the router. Unicast RPF deflects such attacks by forwarding only packets that have source addresses that are valid and consistent with the IP routing table. You can use an extended access list. ACL logging can be CPU intensive and can negatively affect other functions of the network device. 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: (none) Explanation Explanation/Reference: Explanation: Here we see that the IPv6 access list called "cisco" is being applied to incoming VTY connections to the router.html QUESTION 56 Refer to the following access list.cisco. Correct Answer: C Section: (none) Explanation Explanation/Reference: Explanation: The debug ip packet command generates a substantial amount of output and uses a substantial amount of system resources. the network engineer notices that the router CPU utilization has risen to 99 percent. B. D. A packet that matches access-list with the "log" keyword is fast switched. C. A packet that matches access-list with the "log" keyword is Cisco Express Forwarding switched. You can use the RITE traffic exporter. and the rest of the Internet. can take advantage of forged or rapidly changing source IP addresses to allow attackers to thwart efforts to locate or filter the attacks.

D. The router will never accept any HTTP and HTTPS traffic. When administrators use Unicast RPF in strict mode.cisco.html#wp3612805529 .255 any log router (config)#access-list 101 deny ip 172. This capability can limit the appearance of spoofed addresses on a network. and VRF mode strict mode. The router will listen to HTTP and HTTP traffic on port 4433.0 .0.0.10. but the port number must be higher than 1024 unless the default is used.168.0 0. It prevents incoming traffic from IP address ranges 10. Reference: http://www.31.168. loose mode. Note that not all network devices support all three modes of operation. It filters incoming traffic from private addresses in order to prevent spoofing and logs any intrusion attempts.0.0. use the no form of this command.0.0.0. This security feature works by enabling a router to verify the reachability of the source address in packets being forwarded. Although asymmetric traffic flows may be of concern when deploying this feature. If the source IP address is not valid. To return the HTTPS server port number to the default. B.255 172. Administrators can change this behavior using the allow-default option.com/en/US/docs/ios-xml/ios/https/command/nm-https-cr-cl.0. which is applied on the external interface FastEthernet 1/0 of the perimeter router. loose mode.172.172.16.255.0-10.255.html QUESTION 59 What does the following access list.16. accomplish? router(config)#access-list 101 deny ip 10.255. An access list may also be specified that permits or denies certain source addresses in Unicast RPF loose mode.168.255 and logs any intrusion attempts.0.0 . Correct Answer: A Section: (none) Explanation Explanation/Reference: Explanation: To set the secure HTTP (HTTPS) server port number for listening. the packet is discarded. This ACL is used to prevent all packets with a spoofed reserved private source IP address to enter the network. broadcast mode. 192. or VRF mode. Dropping this legitimate traffic could occur when asymmetric routing paths are present in the network.255. 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. It prevents the internal network from being used in spoofed denial of service attacks and logs any exit to the Internet. Unicast RPF in VRF mode will not be covered in this document.16. Correct Answer: C Section: (none) Explanation Explanation/Reference: Explanation: The private IP address ranges defined in RFC 1918 are as follows: 10. loose mode. ip http secure-port port-number no ip http secure-port Syntax Description port-number Integer in the range of 0 to 65535 is accepted.255. use the ip http secure-port command in global configuration mode.0.255.255.192.31. B.0 0.0. QUESTION 60 Refer to the following command: router(config)# ip http secure-port 4433 Which statement is true? A. the packet must be received on the interface that the router would use to forward the return packet.255. C.QUESTION 58 What are the three modes of Unicast Reverse Path Forwarding? A. Unicast RPF loose mode is a scalable option for networks that contain asymmetric routing paths.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. It prevents private internal addresses to be accessed directly from outside. and VRF mode Correct Answer: A Section: (none) Explanation Explanation/Reference: Explanation: Network administrators can use Unicast Reverse Path Forwarding (Unicast RPF) to help limit the malicious traffic on an enterprise network.255. C. strict mode. and broadcast mode strict mode.255. When administrators use Unicast RPF in loose mode.255. The router will listen on port 4433 for HTTPS traffic. 172.168.sh. which allows the use of the default route in the source verification process.0-192.15.0.cisco. a packet that contains a source address for which the return route points to the Null 0 interface will be dropped. The log keyword also enables logging of this intrusion attempt.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. and VRF mode broadcast mode. the source address must appear in the routing table.com/web/about/security/intelligence/unicast-rpf. D.255. B.0 0.0. The default is 443. Unicast RPF works in one of three different modes: strict mode.255 192. D. The router will listen on port 4433 for HTTP traffic. Reference: http://www.0 . C.0. Additionally. loose mode. 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.0.0.255 any log router (config)#access-list 101 deny ip 192.168.

Disable event logging on all noncritical items.com/163/forward_udp_broadcas. Correct Answer: AB Section: (none) Explanation Explanation/Reference: Explanation: . The users are not actual local user accounts.ine. SNMPv3. E. Finally. no encryption) to authenticate polling and trap delivery.20.14. B.16. the following broadcast packets will be forwarded by the router by default:· TFTP .com/snmp-version-3/ QUESTION 63 When using SNMPv3 with NoAuthNoPriv.port 138· Bootstrap Protocol (BOOTP) . Most companies have decided that the information being transmitted isn't valuable enough to be worth the extra effort in upgrading to SNMPv3.20. Specify a logging rate limit.201.225 router(config-if)#ip udp helper-address 172.port 137· NetBIOS Datagram Server .port 67· TACACS UDP port 49 Reference: http://www. The SNMPv3 implementations could be configured to use either of the models on per-group basis (in case if "noAuthNoPriv" is configured. Which command satisfies the requirements of this scenario? A.201. The broadcasts will be forwarded to the unicast address which is specified with the ip helper command. D. 53. However. router(config-if)#ip helper-address 172. B. router(config)#snmp-server host 172. views.225 router(config-if)#udp helper-address 172. It's simple to configure on both the router/switch-side and just as easy on the network monitoring server.QUESTION 61 A network engineer is configuring a routed interface to forward broadcasts of UDP 69.cisco-faq. D. Users. but I would suggest otherwise.14.20. which determines the access policy for its users. the engineer is not concerned with authentication or encryption. C. Which command should be applied to the configuration to allow this? A.ip helper-address {ip address}When configuring the ip helper-address command. Like IPv4 to IPv6. C.16.) A. SNMPv1 and SNMPv2 models only support the "noAuthNoPriv" model since they use plain community string to match the incoming packets. SNMP version 2 uses community strings (think cleartext passwords.225 router(config-if)#ip helper-address 172. "AuthPriv" (messages are authenticated and encrypted priv keyword in CLI).225 69 53 49 Correct Answer: A Section: (none) Explanation Explanation/Reference: Explanation: To let a router forward broadcast packet the command ip helper-address can be used. Infrastructure Services QUESTION 62 A network engineer is configuring SNMP on network devices to utilize one-way SNMP notifications. Set the logging severity level to 1.14.14. Which two actions can you take to provide enhanced logging results? (Choose two. which string is matched for authentication? A.28 traps version 2c CISCORO router(config)#snmp-server host 172.UDP port 69 · Domain Name System (DNS) UDP port 53· Time service . C. The following security levels exits: "noAuthNoPriv" (no authentiation and no encryption noauth keyword in CLI).14. rather they are simply a means to determine who can authenticate to the device. senior management asks you to implement better logging functionality on all IOS-based devices.28 informs version 2c CISCORO router(config)#snmp-server host 172.16. B. D. groups. SNMPv2.28 traps version 3 auth CISCORO router(config)#snmp-server host 172.com/2008/07/19/snmpv3-tutorial/ QUESTION 64 After a recent DoS attack on a network. "AuthNoPriv" (messages are authenticated but not encrypted auth keyword in CLI). Reference: http://www. Increase the logging history . each user is added to a group. there are some major changes under the hood.225. Use the msec option to enable service time stamps.20. Reference: http://blog. B.201. The view is used to define what the user account may access on the IOS device. C.html Topic 6. username serves as a replacement for community string).port 37· NetBIOS Name Server . The problem of course is that the SNMP statistical payload is not encrypted and authentication is passed in cleartext. username password community-string encryption-key Correct Answer: A Section: (none) Explanation Explanation/Reference: Explanation: The following security models exist: SNMPv1. D.201.ccnpguide. SNMP version 3 moves away from the community string approach in favor of user-based authentication and view-based access control.16.20. and 49 to 172.28 informs version 3 auth CISCORO Correct Answer: A Section: (none) Explanation Explanation/Reference: Explanation: Most network admins and engineers are familiar with SNMPv2c which has become the dominant SNMP version of the past decade.

com/en/US/docs/internetworking/troubleshooting/guide/tr19aa. B. C.cisco. B. and SNMP messages will be sent by the less sever (5-7) messages. D.com/c/en/us/td/docs/ios-xml/ios/bsm/command/bsm-xe-3se3850-cr. it is sometimes useful to obtain a full copy of the memory image (called a core dump) to identify the cause of the crash. It interferes with encryption of the full IP payload.html QUESTION 67 What is a function of NPTv6? A. such as SCTP. critical." By increasing the severity level.html QUESTION 66 A network engineer is trying to implement broadcast-based NTP in a network and executes the ntp broadcast client command. In this situation. Reference: http://www. error. Correct Answer: A Section: (none) Explanation Explanation/Reference: Explanation: The NTP service can be activated by entering any ntp command. When you use the ntp broadcast client command. 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. Core dumps are generally very useful to your technical support representative. It is transport-agnostic with respect to transports that do not checksum the IP header. and warning levels). which feature can the engineer use to create a crash collection? A. It enables receiving NTP broadcasts on the interface where the command was executed. Assuming that an NTP server is already set up. designed to provide address independence to the edge network.book/bsm-xe-3se-3850-cr-book_chapter_00. 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. Command Description ntp broadcast client Allows the system to receive NTP broadcast packets on an interface. D. what is the result of the command? A. It enables receiving NTP broadcasts on all interfaces globally.The optional msec keyword specifies the date/time format should include milliseconds. C. It is checksum-neutral. secure copy protocol core dumps warm reloads SNMP NetFlow Correct Answer: B Section: (none) Explanation Explanation/Reference: Explanation: When a router crashes. QUESTION 65 A network engineer finds that a core router has crashed without warning. and to transports that use the TCP/UDP/DCCP (Datagram . in other words. more granular monitoring can occur. B. It enables a device to receive NTP broadcast and unicast packets. or to correlate the order that the events happened. Cisco devices Log error messages of severity levels 0 through 4 (emergency. By default. "saving level warnings or higher. alert. D. This can aid in pinpointing the exact time of events. C. E. It rewrites transport layer headers. It enables a device to be an NTP peer to another device.cisco. Correct Answer: C Section: (none) Explanation Explanation/Reference: Explanation: RFC 6296 describes a stateless IPv6-to-IPv6 Network Prefix Translation (NPTv6) function. It maintains a per-node state. To limit syslog messages sent to the router's history table and to an SNMP network management station based on severity. use the logging history command in global configuration mode.

The operation is scheduled to start immediately. the control protocol is disabled on the source (Device B).1). because the target is not a Cisco device and a well-known TCP port is used. Step 2 configure terminal Example: Device# configure terminal Enters global configuration mode. IPv6 flow control is enabled on the router. connectionless-oriented service-oriented connection-oriented application-oriented Correct Answer: C Section: (none) 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.org/wiki/NAT64 QUESTION 69 A network engineer initiates the ip sla responder tcp-connect command in order to gather statistics for performance gauging. This action allows the responder to reply to the TCP Connect operation. see RFC 6052. algorithmic translation function.0. Reference: http://tools. To avoid as many of the issues associated with NAPT44 as possible. C. What is the result? A. checksum-neutral. enable 2. Which feature allows IPv6 devices to communicate with IPv4 servers? A. RFC 6146). Flow-set marking in 1280-byte or larger packets is enabled. The NAT64 server then creates a NAT-mapping between the IPv6 and the IPv4 address. configure terminal 3.ietf. Flow-label marking in 1280-byte or larger packets is enabled. as shown in the "TCP Connect Operation" figure in the "Information About the IP SLAs TCP Connect Operation" section.Congestion Control Protocol) pseudo-header and checksum NPTv6 provides a simple and compelling solution to meet the address-independence requirement in IPv6. The address-independence benefit stems directly from the translation function of the network prefix translator. NAT NATng NAT64 dual-stack NAT DNS64 Correct Answer: C Section: (none) Explanation Explanation/Reference: Explanation: NAT64 is a mechanism to allow IPv6 hosts to communicate with IPv4 servers. NPTv6 is defined to include a two-way. 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. C. B. and nothing else.org/html/rfc6296 QUESTION 68 IPv6 has just been deployed to all of the hosts within a network. but not to the servers.0. there is no need to send the control message.html QUESTION 70 A network engineer executes the "ipv6 flowset" command.1 port 23 Reference: http://www. clear ipv6 mtu DETAILED STEPS Command or Action Purpose Step 1 enable Example: Device> enable Enables privileged EXEC mode. Step 3 ipv6 flowset Example: . In this example. The IPv6 client embeds the IPv4 address it wishes to communicate with using these bits. ipv6 flowset 4. E. IP SLAs uses the control protocol to notify the IP SLAs responder to enable the target port temporarily. Device A (target device) Configuration configure terminal ip sla responder tcp-connect ipaddress 10. C.wikipedia. D. allowing them to communicate.0.book/ sla_tcp_conn. and sends its packets to the resulting address. Reference: http://en.cisco. D.com/c/en/us/td/docs/ios-xml/ios/ipsla/configuration/15-mt/sla-15-mt. B. In this example. D. SUMMARY STEPS 1. Correct Answer: A Section: (none) 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. Which type of statistics does the engineer see? A.0. IPv6 PMTU is enabled on the router. exit 5. B.

10. One of the last things that the engineer does is to configure an access list (access-list 1 permit any) along with the command ip nat inside source list 1 int s0/0 overload. and the total number of flows contained within them.255.255. Which line in the output indicates that the send queue is full and export packets are not being sent? A.10.10. 11 flows exported in 8 udp datagrams The total number of export packets sent.255. interface serial 0 ip address 172.Defines a NAT pool named ovrld with a range of a single IP !--. possibly because another feature requires running on the packet.Defines Ethernet 0 with an IP address and as a NAT inside interface. 0 export packets were dropped due to output drops Indicates that the send queue was full while the packet was being transmitted.1 255. 0 export packets were dropped enqueuing for the RP 0 export packets were dropped due to IPC rate limiting Indicates that there was a problem transferring the export packet between the RP and the line card.1.16.1. ip nat pool ovrld 172. The ports are in parentheses.Defines Ethernet 1 with an IP address and as a NAT inside interface. Version 5 flow records Specifies the version of the flow. D.3.1 255.0 ip nat outside !--.1. 0 export packets were dropped due to fragmentation failures 0 export packets were dropped due to encapsulation fixup failures Indicates that the packet was dropped because of problems constructing the IP packet.255.10.16. B.1 prefix 24 ! !--. D. Reference: http://www.1 Specifies the export destinations and ports. Exporting using source IP address 10.10.255.1.com/c/en/us/td/docs/ios/12_0s/feature/guide/oaggnf. interface ethernet 1 ip address 10. The command access-list 1 permit any defines only one machine that is allowed through the tunnel.1 (1000) and 10.15-mt-book/ip6-mtu-path-disc.com/c/en/us/td/docs/ios-xml/ios/ipv6_basic/configuration/15-mt/ip6b.16. The command ip nat 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.20.255. 0 export packets were dropped due to no fib 0 export packets were dropped due to adjacency issues Indicates that CEF was unable to switch the packet or forward it up to the process level. 0 flows failed due to lack of export packet No memory was available to create an export packet.0 ip nat inside !--. The command access-list 1 defines interesting traffic that is allowed through the tunnel. output drops enqueuing for the RP fragmentation failures adjacency issues Correct Answer: A Section: (none) Explanation Explanation/Reference: Explanation: Table 5 show ip flow export Field Descriptions Field Description Exporting flows to 10. C.cisco.10.0 ip nat inside !--. ip nat inside source list 7 pool ovrld overload ! ! ! ! . C. The command ip nat 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.1 172.Defines serial 0 with an IP address and as a NAT outside interface.html QUESTION 71 A network engineer executes the show ip flow export command.cisco. Reference: http://www.64 255. 172. Correct Answer: D Section: (none) Explanation Explanation/Reference: Explanation: Configuring NAT to Allow Internal Users to Access the Internet Using Overloading NAT Router interface ethernet 0 ip address 10.10. B.html QUESTION 72 A network engineer is asked to configure a "site-to-site" IPsec VPN tunnel.1.address.Device(config)# ipv6 flowset Configures flow-label marking in 1280-byte or larger packets sent by the device.1 Specifies the source address or interface. Which functions do the two commands serve in this scenario? A.2. 0 export packets were sent up to process level The packet could not be processed by CEF or by fast switching.16.

cisco.20.com/en/US/docs/ios-xml/ios/netflow/configuration/12-4t/cfg-nflow. Correct Answer: A Section: (none) 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. access-list 7 permit 10.data-expt. CEF was enabled at the global level and within seconds.10. which allows for maintenance mode.making process is called "switching".are permitted by access-list 7 has the source address !--. What is switching? A Router must make decisions about where to forward the packets passing through. C. B. B.com/en/US/tech/tk648/tk361/technologies_tech_note09186a0080094e77. which allows multiple inside !--. After reviewing the output of NetFlow.shtml QUESTION 73 A network engineer is configuring a solution to allow failover of HSRP nodes during maintenance windows.com/c/en/us/ support/docs/ip/hot-standby-router-protocol-hsrp/13780. NetFlow output has been filtered by default. Disable and enable all active interfaces on the active HSRP node. what is the next hop of the router and which interface will the router use to get to that destination. CEF offers the following benefits: 1. C.Access-list 7 permits packets with source addresses ranging from !--.translated to an address out of the NAT pool named ovrld. The command ip flow-capture fragment-offset has been enabled. D. Switching is what a router does when it makes the following decisions: 1. Better performance than fast-switching (the default) and takes less CPU to perform the same task. 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. Which feature should the engineer use to gather the required information? A.html QUESTION 74 A network engineer is notified that several employees are experiencing network performance related issues. Note in the previous second configuration.0. 2. Cisco Express Forwarding has not been configured globally. When enabled. called the Forwarding Information Base (FIB).31 and 10. What is CEF? CEF is one of the available switching options for Cisco routers. In order to identify which specific type of traffic is causing this slowness. The FIB is organized differently than the routing table and CEF uses the FIB to decide which interface to send traffic from.31.10.cisco.0. This is why this topic is about Cisco Express Forwarding.31 access-list 7 permit 10.10. Whether to forward or not forward the packets after checking that the destination for the packet is reachable. Reference: http://www. the HSRP priority is reduced. What can you determine based on this information? A. C. Enabling and Disabling CEF is easy. information such as the source/destination IP and Layer 4 port numbers is required.0 through 10. as an alternative to powering down the active router and letting the network respond accordingly. That is when we noticed the `no ip cef' command on the router. If the line protocol of the specified interface goes down.!--. The keyword overload used in the ip nat inside source list 7 pool ovrld overload command allows NAT to translate multiple inside devices to the single address in the pool.0 0.10. 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. CEF creates its own table.10.0. D. Router# config t Router(config)# ip cef Router(config)# . Specifically. E.cisco.31 !--. allows for advanced features like NBAR 3.10.0 through 10.20.0. Every NetFlow configuration aspect was checked and nothing incorrect was found.10. Which action will allow for manual switching of HSRP nodes? A. Correct Answer: A Section: (none) 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. the NAT pool "ovrld"only has a range of one address.devices to be translated to the same valid IP address. This means that another HSRP router with higher priority can become the active router if that router has standby preempt enabled. NetFlow Analyzer started showing OUT traffic for the interfaces. SNMP Cisco IOS EEM NetFlow Syslog WCCP Correct Answer: C Section: (none) 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.10.Indicates that any packets received on the inside interface that !--. Overall. Loopback interfaces can be tracked.6.10. Adjust the HSRP priority without the use of preemption. B. To enable CEF.Translations are overloaded. Enable HSRPv2 under global configuration. Based on the routing table. Track the up/down state of a loopback interface and shut down this interface during maintenance. Reference: http://www. Flow Export version 9 is in use. go into global configuration mode and enter the CEF command. and bandwidth-intensive applications are identified as the root cause. This decision. the network engineer is unable to see OUT traffic on the interfaces.10. If the destination is reachable. 2.20.0 0. D. a flow is identified as the combination of the following key fields: Reference: http://www.html QUESTION 75 An organization decides to implement NetFlow on its network to monitor the fluctuation of traffic that is disrupting core services. !--.

and IPv6 to IPv6 translations at the Internet edge are performed.com/c/dam/en/us/td/docs/solutions/SBA/August2012/Cisco_SBA_BN_IPv6Addre ssingGuide-Aug2012. the NetFlow packets did not mark the destination interfaces and so NetFlow Analyzer was not able to show the OUT traffic for the interfaces. DNS NAT port redirection stateless translation session handling Correct Answer: AB Section: (none) Explanation Explanation/Reference: Explanation: Network Address Translation IPv6 to IPv4. Reference: http://www. B. 1-to-1. B. technology facilitates communication between IPv6-only and IPv4-only hosts and networks (whether in a transit. The DNS64 and NAT64 functions are completely separated. multi homing.com/network-2/netflowanalyzer/2010/05/19/need-for-cef. Without enabling the CEF on the router. The translation mechanism is stateless and provides a 1:1 relationship between the internal addresses and external addresses. E.solution/white_paper_c11-676278.manageengine. What is the best solution to ensure compliance with this new policy? A. B. simply use the `no' form of the command. E. an access. C. and redundancy and load sharing. which is essential to the superiority of NAT64 over NAT-PT. 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: (none) Explanation Explanation/Reference: Explanation: show flow exporter exporter-name Example: Device# show flow exporter FLOW_EXPORTER-1 (Optional) Displays the current status of the specified flow exporter. stateless stateful manual automatic static functional dynamic Correct Answer: AB . Why CEF Needed when enabling NetFlow ? CEF is a prerequisite to enable NetFlow on the router interfaces. The use cases for NPTv6 outlined in the RFC include peering with partner networks. This solution allows both enterprises and ISPs to accelerate IPv6 adoption while simultaneously handling IPv4 address depletion. D. F. G.) A. 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.cisco.cisco.) A. ie.fnflow-exprts. or NAT64.com/en/US/docs/ios-xml/ios/fnetflow/configuration/15-mt/cfg-de. D. B. E. Reference: http:// www. C. C. or an edge network). 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. Reference: https://blogs. D.cisco. CEF decides through which interface traffic is exiting the router. If the CEF is disabled on the router. D. The following command is entered: switch#show flow exporter Flow_Exporter-1 What is the expected output? A.pdf QUESTION 78 Which two functions are completely independent when implementing NAT64 over NAT-PT? (Choose two.html QUESTION 79 Which two methods of deployment can you use when implementing NAT64? (Choose two.in-netflow-data-export.html QUESTION 76 A network engineer has left a NetFlow capture enabled over the weekend to gather information regarding excessive bandwidth utilization. C. NAT64 NAT44 NATv6 NPTv4 NPTv6 Correct Answer: E Section: (none) Explanation Explanation/Reference: Explanation: NPTv6 provides a mechanism to translate the private internal organization prefixes to public globally reachable addresses.To disable CEF. Reference: http://www.com/c/en/us/products/collateral/ios-nx-os-software/enterprise-ipv6. `no ip cef`.html QUESTION 77 A company's corporate policy has been updated to require that stateless.

com/c/en/us/products/collateral/ios-nx-os-software/enterprise-ipv6. The following table provides a high-level overview of the most relevant differences. 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 transparency and scalability Uses address overloading.com/c/en/us/td/docs/ios/fnetflow/command/reference/fnf_book/fnf_01. Flow data is collected from the network traffic during the monitoring process based on the key and nonkey fields in the record. DHCPv6.solution/ white_paper_c11-676277. The n value is a parameter from 1 to 65535 packets that you can configure. The sampler matched 10 packets.10.html QUESTION 80 Which NetFlow component is applied to an interface and collects information about flows? A. SLAAC Reference: http://www. You add the record to the flow monitor after you create the flow monitor. Which statement about the output of the show flow-sampler command is true? A. 120th. each one randomly chosen from every 100-second interval. then NetFlow might sample the 5th.cisco. one packet every 100 packets. C. The flow monitor cache is automatically created at the time the flow monitor is applied to the first interface.cisco. if you set the sampling rate to 1 out of 100 packets. Table 2.10. D. It configures the router to export cache flow information to IP 10. one packet every 100 seconds.1 5858? A. flow monitor flow exporter flow sampler flow collector Correct Answer: A Section: (none) Explanation Explanation/Reference: Explanation: Flow monitors are the NetFlow component that is applied to interfaces to perform network traffic monitoring. B. 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.1 on port UDP/5858. there are important differences. Reference: http://www. The sampler matched 10 packets.html#wp13 14030 QUESTION 81 Refer to the exhibit.10. D. each packet randomly chosen from every group of 100 packets. and so on packets. C.cisco. In the random sampling mode that Random Sampled NetFlow uses. Flow monitors consist of a record and a cache. 302nd. which is configured for the flow monitor and stored in the flow monitor cache.10.com/c/en/us/td/docs/ios/12_0s/feature/guide/nfstatsa. This sample configuration provides NetFlow data on 1 percent of total traffic. The sampler matched 10 packets.html#wp1084291 QUESTION 82 What is the result of the command ip flow-export destination 10. hence lacks in end-to-end address transparency No state or bindings created on the translation State or bindings are created on every unique translation Requires IPv4-translatable IPv6 addresses assignment (mandatory requirement) No requirement on the nature of IPv6 address assignment Requires either manual or DHCPv6 based address assignment for IPv6 hosts Free to choose any mode of IPv6 address assignment viz. For example. incoming packets are randomly selected so that one out of each n sequential packets is selected on average for NetFlow processing. Correct Answer: A Section: (none) Explanation Explanation/Reference: Explanation: The sampling mode determines the algorithm that selects a subset of traffic for NetFlow processing. The sampler matched 10 packets. 199th. B. Manual.Section: (none) Explanation Explanation/Reference: Explanation: While stateful and stateless NAT64 perform the task of translating IPv4 packets into IPv6 packets and vice versa. .

D.10.10. It configures the router to receive cache flow information about flows with destination IP 10. Syntax Description ip-address IP address of the workstation to which you want to send the NetFlow information. use the ip flow-export destination command in global configuration mode. udp-port UDP protocol-specific port number. It configures the router to export cache flow information about flows with destination IP 10.1 on port UDP/5858.B. C.10.10.10.cisco. Reference: http://www.html#wp1023091 .1 and port UDP/5858. It configures the router to receive cache flow information from IP 10.10.1 and port UDP/5858. Correct Answer: A Section: (none) Explanation Explanation/Reference: Explanation: To enable the exporting of information in NetFlow cache entries.com/c/en/us/td/docs/ios/12_0s/feature/guide/12s_mdnf.