Implementing Cisco IP Switched Networks - exam 300-115

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Implementing Cisco IP Switched Networks - exam 300-115



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Topic 1, Layer 2 Technologies

Implementing Cisco IP Switched - exam 300-115
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You have been asked to install and configure a new switch in a customer network. Use the console access to

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the existing and new switches to configure and verify correct device configuration.

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You are connecting the New_Switch to the LAN topology; the switch has been partially configured and you

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need to complete the rest of configuration to enable PC1 communication with PC2. Which of the configuration

.‫ﮐﻠﯿﮏ ﮐﻨﯿﺪ‬

is correct?

9/4/2015 10:17 PM

com/network/exams/cisco/ccnp/300-115/exam-ccnp-300. Option C D. Option A B. Option E Answer: D Explanation: Within any VTP. Logging in to SW1 and using the “show vtp status” command we see this: So we know that the VTP domain must be CCNP. step one is to find the correct VTP name on the other switches. leaving only choice D as correct.. 2. Option D E. So.. 3 so either VTP version 2 or 3 can be configured on the new switch. Use the console access to the existing and new switches to configure and verify correct device configuration. Option B C. so we know that this port must be an access port in VLAN 100. QUESTION NO: 102 You have been asked to install and configure a new switch in a customer network. We also see from the topology diagram that eth 0/0 of the new switch connects to a PC in VLNA 100. A. the VTP domain name must match. This leaves only choice D and E.exam 300-115 2 of 11 http://datis-arad.Implementing Cisco IP Switched Networks . Note that the VTP versions supported in this network are 1. 9/4/2015 10:17 PM .

VLAN 300 Answer: B Explanation: The native VLAN is used for untagged frames sent along a 300-115 3 of 11 http://datis-arad. QUESTION NO: 103 You have been asked to install and configure a new switch in a customer network. VLAN 999 D.. VLAN1 B.. VLAN 200 G. VLAN 99 C. 9/4/2015 10:17 PM . VLAN 50 F. For which configured VLAN are untagged frames sent over trunk between SW1 and SW2? A. By issuing the “show interface trunk” command on SW1 and SW2 we see the native VLAN is 99. Use the console access to the existing and new switches to configure and verify correct device configuration.Implementing Cisco IP Switched Networks . VLAN 40 E. Refer to the configuration.

and SW4 we see that both SW1 and SW2 are operating in VTP server mode. but SW4 is a client.Implementing Cisco IP Switched Networks . SW2.. configure vtp mode as off and configure VLAN 500 and VLAN 600. Configure VLAN 500 and VLAN 600 on SW1 . Configure VLAN 500 and VLAN 600 on SW2 only D. You are adding new VLANs. Answer: A Explanation: By issuing the “show vtp status command on SW2. 9/4/2015 10:17 PM . On SW2. Which configuration step is valid? so we will need to add both VLANs to SW1 and SW2. configure back to vtp server mode.exam 300-115 4 of 11 http://datis-arad.SW2 and SW4 E. Configure VLAN 500 and VLAN 600 on SW1 only C. VLAN500 and VLAN600 to the topology in such way that you need to configure SW1 as primary root for VLAN 500 and secondary for VLAN 600 and SW2 as primary root for VLAN 600 and secondary for VLAN 500.. Configure VLAN 500 & VLAN 600 on both SW1 & SW2 B.

. 9/4/2015 10:17 PM .exam 300-115 5 of 11 http://datis-arad.Implementing Cisco IP Switched Networks .com/network/exams/cisco/ccnp/300-115/exam-ccnp-300. QUESTION NO: 104 You have been asked to install and configure a new switch in a customer network. Use the console access to the existing and new switches to configure and verify correct device configuration..

Disable VTP pruning on SW2. Topic 2. In this case. This step ensures that database entries are restored after a restart or switchover. 2. Answer: A Explanation: Minimum DHCP Snooping Configuration The minimum configuration steps for the DHCP snooping feature are as follows: 1. The protocol used for this port channel shows as LACP. 9/4/2015 10:17 PM . Examine the VTP configuration. Disable VTP pruning on New_Switch and SW4 only. Infrastructure Security QUESTION NO: 105 A Cisco Catalyst switch that is prone to reboots continues to rebuild the DHCP snooping database. Use IP Source Guard to protect the DHCP binding table entries from being lost upon rebooting. SW4 and New_Switch E. Disable VTP pruning on SW1 only B.. accounting D. Disable VTP pruning on SW2 only C. B. as opposed to PAgP. By default. Enable DHCP snooping globally. E. 3. Which of the following configuration steps will allow creating private VLANs? A. the trust state of all interfaces is untrusted. which is a standards based protocol. Apply ip dhcp snooping trust on all interfaces with dynamic addresses. DHCP snooping is inactive on all VLANs. D. What is the solution to avoid the snooping database from being rebuilt after every device reboot? A. By default. Enable DHCP snooping on at least one VLAN. you will need to only disable pruning on the switch that contains the private VLANs. auditing Answer: A Explanation: These three ports show that they are in Port Channel 1. which is Cisco proprietary. Answer: C Explanation: To create private VLANs.. Enable DHCP snooping for all VLANs that are associated with the switch. only SW4 will connect to servers in a private VLAN. A DHCP snooping database agent should be configured. Disable VTP pruning on SW4 only D. Disable Option 82 for DHCP data insertion. Configure the DHCP snooping database agent. Ensure that DHCP server is connected through a trusted 300-115 6 of 11 http://datis-arad. QUESTION NO: 106 Which portion of AAA looks at what a user has access to? A. and the (SU) means they are in use and operating at layer 2. C. You are required to configure private VLANs for a new server deployment connecting to the SW4 switch. authorization B. authentication C. 5.Implementing Cisco IP Switched Networks . Define and configure the DHCP server. 4.

B. the DHCP snooping binding database. Enable VTP version 3. configure a static DHCP snooping binding entry on the switch. On untrusted interfaces. Answer: B Explanation: Dynamic ARP inspection is a security feature that validates ARP packets in a network. (config)# aaa authentication login radius local Answer: B Explanation: In the command “aaa authentication login login radius local” the second login is the name of the AAA method.Implementing Cisco IP Switched Networks . D. Verify the source MAC address of all untrusted interfaces with ip dhcp snooping verify macaddress command. so it will primarily use RADIUS for authentication and fail over to the local user database only if the RADIUS server is unreachable. This database is built by DHCP snooping if DHCP snooping is enabled on the VLANs and on the switch. QUESTION NO: 108 A server with a statically assigned IP address is attached to a switch that is provisioned for DHCP snooping. Private VLANs also carry TLVs that are not known to all types of Cisco switches. To ensure network reachability to the server. Dynamic ARP inspection ensures that only valid ARP requests and responses are relayed. Configure VTP Transparent Mode. It intercepts. This capability protects the network from certain man-in-the-middle attacks. QUESTION NO: 107 Which command creates a login authentication method named "login" that will primarily use RADIUS and fail over to the local user database? A. The switch performs these activities: • Intercepts all ARP requests and responses on untrusted ports • Verifies that each of these intercepted packets has a valid IP-to-MAC address binding before updating the local ARP cache or before forwarding the packet to the appropriate destination. Which configuration must be made before the private VLAN is configured? A. D. Private VLANs are configured in the context of a single switch and cannot have members on other switches. logs. If the ARP packet is received on a trusted interface. Trust the interface that is connected to the server with the ip dhcp snooping trust command.exam 300-115 7 of 11 http://datis-arad. the switch forwards the packet only if it is valid. IP 9/4/2015 10:17 PM . C. Which solution ensures that the server maintains network reachability in the future? A. Disable DHCP snooping information option.. Configure a static DHCP snooping binding entry on the It also lists radius first then local. (config)# aaa authentication login default radius local B. and discards ARP packets with invalid IP-to-MAC address bindings. For more protection against malicious attacks. QUESTION NO: 109 A network engineer wants to ensure Layer 2 isolation of customer traffic using a private VLAN. Ensure all switches are configured as VTP server mode. the network team is considering enabling dynamic ARP inspection alongside DHCP snooping. (config)# aaa authentication login default local radius D. C.. Disable VTP and manually assign VLANs. B. • Drops invalid ARP packets Dynamic ARP inspection determines the validity of an ARP packet based on valid IP-to MAC address bindings stored in a trusted database. Answer: C Explanation: You must configure VTP to transparent mode before you can create a private VLAN. the switch forwards the packet without any checks. (config)# aaa authentication login login radius local C. QUESTION NO: 110 A DHCP configured router is connected directly to a switch that has been provisioned with DHCP snooping.

An entry in this table has an IP address. The port ACL allows only IP traffic with a source IP address in the IP source binding table and denies all other traffic. QUESTION NO: 111 A switch is added into the production network to increase port capacity. D. The switch drops broadcasts when they reach 75% of bandwidth. The interfaces are configured as Layer 3 using the no switchport command. there are two caveats: • The DHCP server must support option 82. A port access control list (ACL) is applied to the interface. No VLANs exist on the switch and/or the switch is configured in VTP transparent mode.) A.D. Answer: C. E. E. The switch uses the IP source binding table only when IP source guard is enabled. or unicast traffic as a percentage (up to two decimal places) of the bandwidth.Implementing Cisco IP Switched Networks . or the client is not assigned an IP address. The switch resumes forwarding broadcasts when they are below 65% of bandwidth. The local DHCP server is disabled prior to enabling IP Source Guard. C. D. By default. Multicast traffic is dropped at 65% and broadcast traffic is dropped at 75% of the total interface bandwidth. The configured SVIs on the switch have been removed for the associated interfaces. even if they are not utilized for dynamic address allocation. The port blocks traffic when the rising threshold is reached. except for DHCP packets allowed by DHCP snooping. F. using the ip verify source port-security interface configuration command. The DHCP server does not support information option 82. Which option is the cause of this issue? A. Static DHCP bindings are not configured on the switch. IP source guard is supported only on Layer 2 ports.You can configure IP source guard with source IP address filtering or with source IP and MAC address filtering. specify the rising threshold level for broadcast. In which three ways does this command impact the traffic? (Choose three. C. D. • (Optional) For level-low. or unicast storm control. C. The IP source binding table has bindings that are learned by DHCP snooping or are manually configured (static IP source bindings). multicast. SNMP traps are sent by default when broadcast traffic reaches 65% of the lower-level threshold. its associated MAC address. A network engineer is configuring the switch for DHCP snooping and IP Source Guard. specify the falling threshold level as a percentage (up to two decimal places) of the 9/4/2015 10:17 PM . Answer: B Explanation: IP source guard is a security feature that restricts IP traffic on nonrouted.exam 300-115 8 of 11 http://datis-arad. but is unable to configure ip verify source under several of the interfaces..00. the switch blocks all IP traffic received on the interface. The switchport is disabled when unicast traffic reaches 75% of the total interface bandwidth. The range is 0. Layer 2 interfacesby filtering traffic based on the DHCP snooping binding database and on manually configured IP source bindings. • The MAC address in the DHCP packet is not learned as a secure address. B. You can use IP source guard to prevent traffic attacks caused when a host tries to use the IP address of its neighbor. Only broadcast traffic is limited by this particular storm control configuration. Source Guard with the ip verify source port-security command is configured under the interfaces that connect to all DHCP clients on the switch. You can enable IP source guard when DHCP snooping is enabled on an untrusted interface. B. The switch is configured for sdm prefer routing as the switched database management template. DHCP snooping must be enabled on all VLANs. After IP source guard is enabled on an interface. Answer: A Explanation: When you enable both IP Source Guard and Port Security. storm control is disabled. Which option is the cause of the problem? A. multicast. including access and trunk ports. clients are not receiving an IP address via the DHCP server. However.F Explanation: storm-control{broadcast|multicast|unicast}level{level[level-low] |ppspps[pps-low]} Configure broadcast. The MAC address of the DHCP client is learned as a secure address only when the switch receives non-DHCP data traffic.00 to 100. QUESTION NO: 112 The command storm-control broadcast level 75 65 is configured under the switch port connected to the corporate mail server. The DHCP client interfaces have storm control configured. and its associated VLAN number. The keywords have these meanings: • For level..

00. switch# show ip arp inspection E. If you do not configure a falling suppression level..E Explanation: QUESTION NO: 115 While troubleshooting a network outage.) creating excessive traffic and degrading network performance. switch(config)# switchport port-security protect D. switch# show ip verify source D. You can also customize the time to recover from the specified error disable cause (default is 300 seconds) by entering the errdisable recovery interval interval command. 9/4/2015 10:17 PM . They decide to configure the network to automate the process of re-enabling user ports.. If a port is in per-VLAN errdisable mode. switch(config)# errdisable recovery cause security-violation Answer: B Explanation: When a secure port is in the error-disabled state. Which command accomplishes this task? A.00 to 100. unicast.Implementing Cisco IP Switched Networks . the broadcast keyword was used so only broadcast traffic is limited. switch(config)# errdisable recovery interval 180 B. switch# show port-security C. mistakes in network configuration. or users issuing a denial-of-service attack can cause a storm. QUESTION NO: 114 The network monitoring application alerts a network engineer of a client PC that is acting as a rogue DHCP server. SDM routing C. storm control is disabled. Which option decreases consumption of bandwidth used by broadcast traffic? A. switch# show mac address-table B. storm control B. it is set to the rising suppression level. a network engineer discovered an unusually high level of broadcast traffic coming from one of the switch interfaces. integrated routing and bridging E. This is the default mode. switch# show mac address-table address <mac address> Answer: A. Storm control is configured for the switch as a whole but operates on a per-port basis. or multicast packets.exam 300-115 9 of 11 http://datis-arad. Dynamic ARP Inspection Answer: A Explanation: Storm control prevents traffic on a LAN from being disrupted by a broadcast. Errors in the protocol-stack implementation. In this case. The port forwards traffic when traffic drops below this level. By default. bandwidth. You can also set the switch to shut down the port when the rising threshold is reached. you can also use clear errdisable interface name vlan range command to re-enable the VLAN on the port. QUESTION NO: 113 After port security is deployed throughout an enterprise campus. or unicast storm on a port. A LAN storm occurs when packets flood the LAN. Storm control uses rising and falling thresholds to block and then restore the forwarding of broadcast. multicast. This value must be less than or equal to the rising suppression value. switch(config)# switchport port-security aging type inactivity E. The range is 0. switch(config)# errdisable recovery cause psecure-violation C. Which two commands help trace this PC when the MAC address is known? (Choose two. the network team has been overwhelmed with port reset requests. you can bring it out of this state automatically by configuring the errdisable recovery cause psecure-violation global configuration command or you can manually reenable it by entering the shutdown and no shut down interface configuration commands. Cisco IOS parser D.

The authentication server validates the identity of the client and notifies the switch whether or not theclient is authorized to access the LAN and switch services. This process continues until there is successful communication with a listed authorization method. aaa authorization D. RADIUS with EAP Extension B.The Remote Authentication Dial-In User Service (RADIUS) security system with Extensible Authentication Protocol (EAP) extensions is the only supported authentication server. RADIUS with CoA D. This can include a PPP. aaa authentication C. SLIP. refer to the chapter "Configuring Authentication Proxy" in the "Traffic Filtering and Firewalls" part of this book.exam 300-115 10 of 11 http://datis-arad. SLIP. the authentication service is transparent to the client. For detailed information on the authentication proxy feature. QUESTION NO: 118 Which authentication service is needed to configure 802. network B. • Reverse Access—Applies to reverse Telnet sessions. or all methods defined are exhausted. IP mobile C. Method lists are specific to the authorization type requested: • Auth-proxy—Applies specific security policies on a per-user basis. the Cisco IOS software selects the next method listed in the method list... When you create a named method list. TACACS+ C. QUESTION NO: 116 Which command globally enables AAA on a device? A. associated with a specific privilege level. • EXEC—Applies to the attributes associated with a user EXEC terminal session. you are defining a particular list of authorization methods for the indicated authorization Because the switch acts as the proxy. including global configuration commands. A method list is simply a named list describing the authorization methods to be queried (such as RADIUS or TACACS+). EXEC D. Method lists enable you to designate one or more security protocols to be used for authorization. aaa new-model B. AAA features are not available for use until you enable AAA globally by issuing the aaa new-model command. Command authorization attempts authorization for all EXEC mode commands. • Commands—Applies to the EXEC mode commands a user issues. RADIUS using VSA Answer: A Explanation: With 802. • Network—Applies to network connections. enable AAA by using the aaa new-model global configuration command. aaa accounting Answer: A Explanation: To configure AAA authentication. in sequence.1x? A.Implementing Cisco IP Switched Networks . 9/4/2015 10:17 PM . Cisco IOS software uses the first method listed to authorize users for specific network services. QUESTION NO: 119 Refer to the exhibit. and ARAP connections? A. the authentication server—performs the actual authentication of the client.1x. thus ensuring a backup system in case the initial method fails. or ARAP connection. auth-proxy Answer: A Explanation: Method lists for authorization define the ways that authorization will be performed and the sequence in which these methods will be performed. QUESTION NO: 117 Which AAA Authorization type includes PPP. if that method fails to respond.

if that fails use the line password. RADIUS server. then if that fails use the local user database.exam 300-115 11 of 11 http://datis-arad. local username. which lists none as the authentication method. RADIUS server. line password B. so here the “aaa authentication login default group radius local line” means to use RADIUS first.‫ ﺑﻼﻣﺎﻧﻊ ﻣﯿﺒﺎﺷﺪ‬. Finally. RADIUS server D. where the configured authentication method is named “default. no username with password linepass D. Line password.Implementing Cisco IP Switched Networks . local username Answer: A Explanation: SSH sessions use the vty lines. When a network administrator is attempting an SSH connection to the device. username cisco with password cisco‫ﮐﻠﯿﻪ ﺣﻘﻮق ﻣﺎدی و ﻣﻌﻨﻮی اﯾﻦ ﺳﺎﯾﺖ ﻣﺮﺑﻮط ﺑﻪ ﺷﺮﮐﺖ داﺗﯿﺲ آراد ﺳﭙﻨﺘﺎ ﺑﻮده و ﺗﻨﮫﺎ ﮐﭙﯽ ﺑﺮداری از ﻣﻄﺎﻟﺐ آﻣﻮزﺷﯽ آن ﺑﺎ ذﮐﺮ ﻣﻨﺒﻊ‬ ‫ﺗﻤﺎس ﺑﺎ ﻣﺎ‬ ‫دﻋﻮت ﺑﻪ ھﻤﮑﺎری‬ ‫درﺑﺎره ﻣﺎ‬ ‫آﻣﻮزش‬ ‫راھﮑﺎرھﺎ‬ ‫ﺧﺎﻧﻪ‬ 9/4/2015 10:17 PM . line password. . QUESTION NO: 120 Refer to the exhibit. local username C. meaning that credentials are not required and all sessions are allowed access immediately. Line password.” The AAA default login preference is stated in order from first to last. in which order does the device check the login credentials? A. Which login credentials are required when connecting to the console port in this output? A. RADIUS server. local username. login authentication default Answer: A Explanation: Here the console has been configured with the NO_AUTH name. none required B... None means no authentication.