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CCIE and CCNP Enterprise Core ENCOR 350-401 Sample Quiz

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CCIE and CCNP ENARSI 300-410 | Layer 3 Technologies

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Question 1 of 19

1. Question

Category: ENARSI-Layer 3 Technologies
Which of the following statements are true regarding EIGRP stub? Choose two.
- A stub router indicates in the hello packet to all neighboring routers its status as a stub router. Any neighbor that receives a packet informing it of the stub status does not query the stub router for any routes. Therefore, a router that has a stub peer does not query that peer.
- All downstream routers from the stub router do not receive any routes, thus it is generally not suitable to configure stub on any router other than a remote branch or a spoke.
- A stub router indicates in the hello packet to all neighboring routers its status as a stub router. Any neighbor that receives a packet informing it of the stub status does not query the stub router for any routes. Therefore, a router that has a stub peer queries that peer.
- All downstream routers from the stub router do not receive any routes, thus it is generally suitable to configure stub on any router other than a remote branch or a spoke.
Correct

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_eigrp/configuration/15-mt/ire-15-mt-book/ire-eigrp-stub-rtg.html

Incorrect

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_eigrp/configuration/15-mt/ire-15-mt-book/ire-eigrp-stub-rtg.html
Question 2 of 19

2. Question

Category: ENARSI-Layer 3 Technologies
Which of the following statements are true about PBR? Choose two.
- PBR is the process of using a route map to match on something more than the destination and then defining the path out of the router based on those conditions. PBR takes precedence over the routing table.
- PBR can be used to forward traffic that matches a source address or subnet. To accomplish that, you’d need to use an ACL that matches the source network and then forward to a specific next hop using “set ip next-hop <x.x.x.x>”.
- PBR can be used to forward traffic that matches a destination address or subnet. To accomplish that, you’d need to use an ACL that matches the source network and then forward to a specific next hop using “set next-hop <x.x.x.x>”.
- PBR is the process of using a route map to match on something more than the source and then defining the path out of the router based on those conditions.
Correct

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_pi/configuration/15-mt/iri-15-mt-book/iri-pbr.html

Incorrect

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_pi/configuration/15-mt/iri-15-mt-book/iri-pbr.html
Question 3 of 19

3. Question

Category: ENARSI-Layer 3 Technologies
Which of the following statements are true regarding BGP set as-path prepend command? Choose two.
- The set as-path prepend variation allows you to prepend an arbitrary autonomous system path string to BGP routes.
- Usually, the local autonomous system number is prepended multiple times, increasing the autonomous system path length.
- The set as-path prepend variation allows you to prepend an arbitrary autonomous system path community to BGP routes.
- Usually, the local autonomous system number is prepended multiple times, decreasing the autonomous system path length.
Correct

https://www.cisco.com/c/m/en_us/techdoc/dc/reference/cli/n5k/commands/set-as-path.html#:~:text=The%20set%20as%2Dpath%20prepend,the%20autonomous%20system%20path%20length

Incorrect

https://www.cisco.com/c/m/en_us/techdoc/dc/reference/cli/n5k/commands/set-as-path.html#:~:text=The%20set%20as%2Dpath%20prepend,the%20autonomous%20system%20path%20length
Question 4 of 19

4. Question

Category: ENARSI-Layer 3 Technologies
Which of the following statements are true about the AD? Choose two.
- Administrative Distance (AD) is a value that routers use in order to select the best path when there are two or more different routes to the same destination from two different routing protocols.
- Administrative Distance counts the reliability of a routing protocol, the lower the value the more reliable it is considered. You can change the default AD values using the “distance” command e.g. On Cisco routers, OSPF carries an AD value of 110 whereas a static route has a value of 1 (always the most preferred routing source).
- Administrative Distance (AD) is a value that routers use in order to select the best path when there are two or more different routes to the same destination from one routing protocol.
- Administrative Distance counts the reliability of a routing protocol, the lower the value the more reliable it is considered. You can change the default AD values using the “distance” command e.g. On Cisco routers, OSPF carries an AD value of 120 whereas a static route has a value of 1 (always the most preferred routing source).
Correct

https://www.cisco.com/c/en/us/support/docs/ip/border-gateway-protocol-bgp/15986-admin-distance.html

Incorrect

https://www.cisco.com/c/en/us/support/docs/ip/border-gateway-protocol-bgp/15986-admin-distance.html
Question 5 of 19

5. Question

Category: ENARSI-Layer 3 Technologies
Which of the following statements are true about OSPF summarization? Choose two.
- There are two types of route summarization within OSPF, the internal (ABR) and external (ASBR).
- The summary route must be present in the routing table before the router will advertise the summary route.
- There are two types of route summarization within OSPF, the internal (ASBR) and external (ABR).
- The summary route must NOT be present in the routing table before the router will advertise the summary route.
Correct

https://www.cisco.com/c/m/en_us/techdoc/dc/reference/cli/nxos/commands/ospf/summary-address-ospf.html

Incorrect

https://www.cisco.com/c/m/en_us/techdoc/dc/reference/cli/nxos/commands/ospf/summary-address-ospf.html
Question 6 of 19

6. Question

Category: ENARSI-Layer 3 Technologies
Which of the following statements are true regarding perquisites for BFD? Choose two.
- CEF must be enabled on all participating routers.
- IP routing must be enabled on all participating routers.
- One of the IP routing protocols supported by BFD cannot be configured on the routers before BFD is deployed.
- CEF or fast switching must be enabled on all participating routers.
- IP routing must NOT be enabled on all participating routers.
Correct

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_bfd/configuration/15-mt/irb-15-mt-book/irb-bi-fwd-det.html

Incorrect

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_bfd/configuration/15-mt/irb-15-mt-book/irb-bi-fwd-det.html
Question 7 of 19

7. Question

Category: ENARSI-Layer 3 Technologies
Which of the following statements are true about BGP route reflector configuration shown below? Choose two.

R1 and R4 are Clients connected to R2 which is the Route reflector. But R1 and R4 do not seem to get routes from R2.

Router 2:

router bgp 100

no synchronization

bgp log-neighbor-changes

neighbor 1.2.1.1 remote-as 100

neighbor 1.2.1.1 route-reflector-client

neighbor 1.4.1.4 remote-as 100

neighbor 1.4.1.4 route-reflector-client

no auto-summary

Router 1:

router bgp 100

no synchronization

bgp log-neighbor-changes

network 4.0.0.0

network 5.0.0.0

network 6.0.0.0

aggregate-address 4.0.0.0 252.0.0.0 as-set

neighbor 1.2.1.2 remote-as 100

neighbor 1.3.1.3 remote-as 300

no auto-summary

R4:

router bgp 100

no synchronization

bgp log-neighbor-changes

network 13.0.0.0

neighbor 1.4.1.2 remote-as 100

no auto-summary

R4#: show ip route

1.0.0.0/24 is subnetted, 1 subnets

C 1.4.1.0 is directly connected, Serial1/0.1

C 13.0.0.0/8 is directly connected, Loopback1

R4#show ip bgp

* i4.0.0.0 1.2.1.1 0 100 0 i

* i4.0.0.0/6 1.2.1.1 0 100 0 i

* i5.0.0.0 1.2.1.1 0 100 0 i

* i6.0.0.0 1.2.1.1 0 100 0 i
- The problem is the next-hop reachability, i.e. 1.2.11 is not reachable from R4 (no route in the routing table).
- You configure static routing or an IGP to make sure that the BGP routes next-hops are reachable from all the routers.
- The problem is the next-hop reachability, i.e. 1.2.11 is not reachable from R4 (no route in the BGP table).
- You configure static routing or an IGP to make sure that the BGP routes next-hops are NOT reachable from all the routers.
Correct

https://www.cisco.com/c/en/us/td/docs/routers/ncs4000/software/configure/guide/configurationguide/configurationguide_chapter_0110001.pdf

Incorrect

https://www.cisco.com/c/en/us/td/docs/routers/ncs4000/software/configure/guide/configurationguide/configurationguide_chapter_0110001.pdf
Question 8 of 19

8. Question

Category: ENARSI-Layer 3 Technologies
Which of the following statements are true regarding redistribution of OSPF routes into BGP? Choose two.
- If you configure the redistribution of OSPF into BGP without keywords, only OSPF intra-area and inter-area routes are redistributed into BGP, by default.
- You can use the internal keyword along with the redistribute command under router bgp to redistribute OSPF intra- and inter-area routes.
- If you configure the redistribution of OSPF into BGP without keywords, only OSPF intra-area are redistributed into BGP, by default.
- If you configure the redistribution of OSPF into BGP without keywords, only OSPF inter-area are redistributed into BGP, by default.
- You can use the external keyword along with the redistribute command under router bgp to redistribute OSPF inter-area routes.
Correct

https://www.cisco.com/c/en/us/support/docs/ip/border-gateway-protocol-bgp/5242-bgp-ospf-redis.html#:~:text=If%20you%20configure%20the%20redistribution,%2D%20and%20inter%2Darea%20routes

Incorrect

https://www.cisco.com/c/en/us/support/docs/ip/border-gateway-protocol-bgp/5242-bgp-ospf-redis.html#:~:text=If%20you%20configure%20the%20redistribution,%2D%20and%20inter%2Darea%20routes
Question 9 of 19

9. Question

Category: ENARSI-Layer 3 Technologies
Which of the following statements are true about BGP maximum prefix features? Choose two.
- The BGP Maximum-Prefix feature allows you to control how many prefixes can be received from a neighbor. You can use show ip bgp summary command to verify the prefixes received.
- By default, this feature allows a router to bring down a peer when the number of received prefixes from that peer exceeds the configured Maximum-Prefix limit.
- This feature is commonly used for internal BGP peers but can be applied to external BGP peers also.
- The BGP Maximum-Prefix feature allows you to control how many prefixes can be received from a neighbor. You can use show ip bgp command to verify the prefixes received.
Correct

https://www.cisco.com/c/en/us/support/docs/ip/border-gateway-protocol-bgp/25160-bgp-maximum-prefix.html

Incorrect

https://www.cisco.com/c/en/us/support/docs/ip/border-gateway-protocol-bgp/25160-bgp-maximum-prefix.html
Question 10 of 19

10. Question

Category: ENARSI-Layer 3 Technologies
Which of the following statements are true about OSPFv2 LFA? Choose four.
- There is a set of pre-defined conditions that must be met for LFA in order to successfully provide a backup route against link or node protection, i.e. inequality one, two and three.
- LFA repair path selection policy tiebreaks with SLRG, primary path, interface-disjoint, lowest-metric, linecard-disjoint, node-protecting, broadcast-interface-disjoint and load-sharing in that order.
- Linecard-disjoint prefers a backup route from an interface that is on another line card. This is also a special case of SRLG however; this does not require any special configuration and is handled automatically.
- Interface-Disjoint means that repair path is over a different interface as compared to the interface used to reach destination via primary path. In case of point-to-point links, this condition is always met.
- Interface-disjoint prefers a backup route from an interface that is on another line card. This is also a special case of SRLG however; this does not require any special configuration and is handled automatically.
- Linecard-Disjoint means that repair path is over a different interface as compared to the interface used to reach destination via primary path. In case of point-to-point links, this condition is always met.
Correct

https://www.cisco.com/c/en/us/support/docs/ip/ip-routing/200225-Configure-Loop-Free-Alternate-path-with.html

Incorrect

https://www.cisco.com/c/en/us/support/docs/ip/ip-routing/200225-Configure-Loop-Free-Alternate-path-with.html
Question 11 of 19

11. Question

Category: ENARSI-Layer 3 Technologies
Which of the following statements are true about logging best practices? Choose two.
- Accurate and reliable time is required for syslog purposes, such as during forensic investigations of potential attacks. It is important to implement a correct and consistent logging timestamp configuration to ensure that you can correlate logging data.
- Logging timestamps should be configured to include the date and time with millisecond precision and to include the time zone in use on the device. Sending logs to a central location and avoiding logging to monitor sessions or console are also well-known best practices.
- It is recommended to set clocks on each router manually as opposed to using an NTP server.
- It is recommended to NOT turn timestamping for logging to avoid extra CPU utilization.
Correct

https://www.cisco.com/c/en/us/support/docs/ip/access-lists/13608-21.html#anc61

Incorrect

https://www.cisco.com/c/en/us/support/docs/ip/access-lists/13608-21.html#anc61
Question 12 of 19

12. Question

Category: ENARSI-Layer 3 Technologies
What are the two actions that can be taken when implementing CoPP on a Cisco router? Choose two.
- You can choose to drop all traffic by setting the conform and exceed actions to drop.
- You can choose to let your traffic pass by setting the conform and exceed actions to transmit.
- You can choose to drop all traffic by setting the conform and exceed actions to transmit.
- You can choose to let your traffic pass by setting the conform and exceed actions to drop.
Correct

https://www.cisco.com/c/en/us/td/docs/ios/12_2sb/feature/guide/cpp.html

Incorrect

https://www.cisco.com/c/en/us/td/docs/ios/12_2sb/feature/guide/cpp.html
Question 13 of 19

13. Question

Category: ENARSI-Layer 3 Technologies
Which of the following statements are true about redistributing EIGRP into OSPF? Choose two.
- Basic redistribution into OSPF is simple, just remember to use the word subnets because if you issue the redistribution command without the subnets statement you will only redistribute classful routes.
- The redistribution must be done on the router that has both protocols configured. You can use route maps to allow or deny the prefixes.
- Basic redistribution into OSPF is simple, just remember to use the word subnets because if you issue the redistribution command with the subnets statement you will only redistribute classful routes.
- The redistribution must be done on the router that has both protocols configured. You can NOT use route maps to allow or deny the prefixes.
Correct

Incorrect
Question 14 of 19

14. Question

Category: ENARSI-Layer 3 Technologies
Which of the following statements are true about redistributing OSPF into EIGRP? Choose two.
- When redistributing routes from other IGPs such as the OSPF into EIGRP, you must specify the metric for the redistributed routes. You can specify the default metric for all the routes by using the redistribution command.
- You can also set the metric for each redistribute command separately.
- When redistributing routes from other IGPs such as the OSPF into EIGRP, you must NOT specify the metric for the redistributed routes.
- You can NOT set the metric for each redistribute command separately.
Correct

Incorrect
Question 15 of 19

15. Question

Category: ENARSI-Layer 3 Technologies
Which of the following statements are true about OSPFv3 address families? Choose two.
- To use the IPv4 unicast address families (AF) in OSPFv3, you must enable IPv6 on a link, although the link may not be participating in IPv6 unicast AF. You can use “address-family ipv4 unicast” to configure IPv4 address family.
- OSPFv3 IPv4 support is specified in RFC 5838 and it does not support virtual links.
- To use the IPv4 unicast address families (AF) in OSPFv3, you must enable IPv6 on a link, although the link may not be participating in IPv6 unicast AF. You can use “address-family ipv4 unicast” to configure IPv4 address family.
- OSPFv3 IPv4 support is specified in RFC 5838 and it does not support virtual links.
- To use the IPv4 unicast address families (AF) in OSPFv3, you must enable IPv6 on a link, although the link may not be participating in IPv6 unicast AF. You can use “address-family ipv4v6 unicast” to configure IPv4 address family.
- OSPFv3 IPv4 and IPv6 support is specified in RFC 5838 and they not support virtual links.
Correct

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_ospf/configuration/15-mt/iro-15-mt-book/ospfv3_address_families.pdf

Incorrect

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_ospf/configuration/15-mt/iro-15-mt-book/ospfv3_address_families.pdf
Question 16 of 19

16. Question

Category: ENARSI-Layer 3 Technologies
Which of the following statements are true about “debug ip routing” command? Choose two.
- The command should NOT be used without including an ACL that matches the traffic.
- You can use this command to display information on IP routing table updates and route cache updates. It displays the routing metric as well as the AD.
- The command should be used without including an ACL that matches the traffic.
- You can use this command to display information on IP routing table updates and route cache updates. It displays the routing metric but not the AD.
Correct

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/debug/command/i1/db-i1-cr-book/db-i2.html#wp2396839249

Incorrect

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/debug/command/i1/db-i1-cr-book/db-i2.html#wp2396839249
Question 17 of 19

17. Question

Category: ENARSI-Layer 3 Technologies
Which of the following statements are true about VRF-lite? Choose two.
- VRF-lite is a feature that enables a service provider to support two or more VPNs, where IP addresses can be overlapped among the VPNs.
- “ip vrf forwarding” command associates the VRF with the Layer 3 interface.
- VRF-lite is a feature that enables a service provider to support two or more VPNs, where IP addresses can NOT be overlapped among the VPNs.
- “ip vrf-forwarding” command associates the VRF with the Layer 3 interface.
Correct

https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst4500/12-2/31sg/configuration/guide/conf/vrf.html

Incorrect

https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst4500/12-2/31sg/configuration/guide/conf/vrf.html
Question 18 of 19

18. Question

Category: ENARSI-Layer 3 Technologies
Which of the following statements are true about LFA Route Selection criteria? Choose two.
- In the event of two backup routes available for a protected primary prefix, only one is selected based on the ordered list of attributes they carry. The backup prefix selection criteria are used with their preference in decreasing order.
- The value of 10, 20 and 50 are assigned to the SRLG, Primary-Path, and Linecard-Disjoint attributes respectively. Linecard-disjoint prefers a backup route from an interface that is on another line card. Linecard-disjoint: This prefers a backup route from an interface that is on another line card. This is also a special case of SRLG.
- The value of 10, 20 and 50 are assigned to the SRLG, Primary-Path, and Load-Sharing attributes respectively.
- The value of 10, 20 and 50 are assigned to the Node-Protecting, Primary-Path, and Load-Sharing attributes respectively.
Correct

https://www.cisco.com/c/en/us/support/docs/ip/ip-routing/200225-Configure-Loop-Free-Alternate-path-with.html

Incorrect

https://www.cisco.com/c/en/us/support/docs/ip/ip-routing/200225-Configure-Loop-Free-Alternate-path-with.html
Question 19 of 19

19. Question

Category: ENARSI-Layer 3 Technologies
Which of the following statements are true regarding IBGP Multipathing? Choose two.
- maximum-paths ibgp command controls the maximum number of parallel iBGP routes that can be installed in a routing table. The iBGP Multipath Load Sharing feature enables the BGP speaking router to select multiple iBGP paths as the best paths to a destination. The best paths or multipaths are then installed in the IP routing table of the router
- show ip bgp ip-prefix command can be used to verify the multipath load balancing.
- maximum-paths ibgp command controls the maximum number of parallel iBGP next hops that can be installed in a routing table.
- show ip bgp ip prefix command can be used to verify the multipath load balancing.
Correct

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_bgp/configuration/xe-16-10/irg-xe-16-10-book/ibgp-multipath-load-sharing.pdf

Incorrect

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_bgp/configuration/xe-16-10/irg-xe-16-10-book/ibgp-multipath-load-sharing.pdf

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