Deck 14: Enterprise Routing and Switching, Professional (JNCIP-ENT)

Question 1

You are deploying a new EVPN service for your customers. You must build the service based on the following requirements: - both Layer 2 and Layer 3 functionality must be supported; - your customers must be able to support multiple VLANs in the same EVPN instance (EVI). In this scenario, which two types of routing instances should be configured? (Choose two.)

A) virtual switch
B) virtual router
C) VRF
D) EVPN

Answer 1

VRF
EVPN

Question 2

Which two statements about wide and narrow metrics used in IS-IS are correct? (Choose two.)

A) Wide metrics are enabled with the wide-metrics-only parameter under protocols isis hierarchy. Wide metrics are enabled with the wide-metrics-only parameter under protocols isis hierarchy.
B) Narrow metrics are enabled by default and use 8 bits in TLVs to send information.
C) Wide metrics are sent by default and use 24 bits in TLVs to send information.
D) Disabling narrow metrics results in external routes being leaked from L1 to L2 areas automatically.

Answer 2

Wide metrics are enabled with the wide-metrics-only parameter under protocols isis hierarchy. Wide metrics are enabled with the wide-metrics-only parameter under protocols isis hierarchy.
Narrow metrics are enabled by default and use 8 bits in TLVs to send information.

Question 3

Why do interprovider option B VPNs scale better than interprovider option A VPNs?

A) The ASBRs in interprovider option B VPNs do not need per-VPN VRF tables.
B) The ASBRs in interprovider option A VPNs do not need per-VPN VRF tables.
C) The ASBRs in interprovider option A VPNs only carry internal routes.
D) The ASBRs in interprovider option B VPNs only carry internal routes.

Answer 3

The ASBRs in interprovider option B VPNs do not need per-VPN VRF tables.

Question 4

What is the purpose of the cluster-list attribute within a BGP route reflector group?

A) to disable internal cluster re-advertisements
B) to facilitate loop detection within the route reflector network
C) to define the router that first advertised the route to the route reflector
D) to override the router ID value within the cluster

Question 5

A network designer wants to ensure that traffic from R2 destined for 2001:db9:ffff:ff00::/62 always traverses the R2-R1 link if that link is available. Referring to the exhibit, which configuration change will satisfy this requirement?

A)
B)
C)

Question 6

You have a mixed vendor EVPN environment and you need to ensure VXLAN interoperability between all devices. In tins scenario, winch statement is correct?

A) You should only use pure Type 2 routes.
B) You should only use pure Type 5 routes.
C) You should only use Type 2 and Type 5 routes.
D) You should only use Type 6 and Type 2 routes.

Question 7

You have a Layer 3 VPN established between PE-1 and PE-2 to allow communication between CE-1 and CE-2. Referring to the exhibit, which statement is correct?

A) You will need an OSPF import policy on PE-1 to receive the BGP routes, learned from PE-2, through the Layer 3 VPN.
B) You will need a BGP export policy on PE-1 to redistribute the routes, learned from CE-1, through the Layer 3 VPN.
C) You will need a VRF import policy on PE-1 to advertise the BGP routes, learned from CE-1, through the Layer 3 VPN.
D) You will need an OSPF export policy on PE-2 to redistribute the BGP routes, learned from PE-1, through the Layer 3 VPN.

Question 8

You are asked to configure a series of interface policers and firewall filters, which include policers, on the same device. You must ensure that the two configuration methods do not conflict. What are two considerations when performing this task? (Choose two.)

A) On inbound traffic, firewall filters are applied before interface policers.
B) On outbound traffic, interface policers are applied before firewall filters.
C) On outbound traffic, firewall filters are applied before interface policers.
D) On inbound traffic, interface policers are applied before firewall filters.

Question 9

You are the administrator of AS 65512. You are learning the 192.168.1.0/24 prefix from both AS 100 and AS 200. You want traffic destined to the 192.168.1.0.0/24 prefix to exit your AS towards AS 200. How would you accomplish this task?

A) Configure an import routing policy on PE-2 to set a higher MED on the path learned from AS 100.
B) Configure an import routing policy on PE-2 to modify the origin attribute on the path learned from AS 100.
C) Configure an import routing policy on PE-2 to set a higher local preference value on the path learned from AS 200.
D) Configure an import routing policy on PE-2 to append the AS path attribute on the path learned from AS 100.

Question 10

Referring to the exhibit, traffic sent from CE-A2 to PE3 does not loop back to CE-A2 through PE2. Winch two EVPN functions accomplish this task? (Choose two.)

A) multicast ingress replication
B) aliasing
C) split horizon
D) designated forwarder election

Question 11

Referring to the exhibit, there is a Layer 3 VPN setup that connects sites CE-A-1, CE-A-2, and CE-A-3 together. Host-1 can communicate with Host-3, but Host-1 cannot communicate with Host-2. What must you do to solve the problem?

A) Change the route distinguisher in both routing instances to the same value.
B) Use the next-table configuration statement for static routes in the corresponding routing instances. Use the next-table configuration statement for static routes in the corresponding routing instances.
C) Use BGP instead of static routing between the CE and PE devices.
D) Use the auto-export command in both routing instances. auto-export command in both routing instances.

Question 12

Which two statements regarding Ethernet segments (ES) are correct? (Choose two.)

A) The Type-4 EVPN route will be used to elect the designated forwarder for the ES.
B) The Type-3 EVPN route will be used for the aliasing function to load-balance to the ES.
C) The Type-1 EVPN route will indicate if the ES is all-active or single-active.
D) The Type-2 EVPN route will indicate if there is a designated forwarder on the ES.

Question 13

Referring to the exhibit, the local BGP router is receiving IPv4 routes from the BGP neighbor, but it is not receiving L3 VPN routes from the BGP neighbor. Which two actions should you take to solve this problem? (Choose two.)

A) Configure the family inet-vpn unicast statement on the BGP neighbor. Configure the family inet-vpn unicast statement on the BGP neighbor.
B) Configure the family inet unicast statement on the local BGP router. family inet unicast statement on the local BGP router.
C) Configure the family inet-vpn unicast statement on the local BGP router.
D) Configure the family inet unicast statement on the BGP neighbor.

Question 14

Referring to the exhibit, which OSPFv3 configuration is implemented on router R1?

A) set protocols ospf3 area 0.0.0.0 interface ge-0/0/0.0 set protocols ospf3 area 0.0.0.1 interface ge-0/0/1.0 set protocols ospf3 area 0.0.0.1 interface ge-0/0/0.0
B) set protocols ospf3 area 0.0.0.1 virtual-link neighbor-id 172.16.1.2
C) set protocols ospf3 area 0.0.0.1 interface ge-0/0/0.0 secondary
D) set protocols ospf3 area 0.0.0.1 interface ge-0/0/0.0 interface-type p2p

Question 15

You manage an MX Series device which includes the configuration shown in the exhibit. Traffic marked with DSCP 000011 is entering the ge-1/0/4 interface at 102 Mbps. The traffic exits the device on the ge-1/0/5 interface. No other traffic is transiting the router. In this scenario, what happens to traffic exceeding 100 Mbps?

A) Traffic exceeding 100 Mbps is redirected to a rate limiter.
B) Traffic exceeding 100 Mbps is buffered.
C) Traffic exceeding 100 Mbps is dropped.
D) Traffic exceeding 100 Mbps is forwarded.

Question 16

Which two statements about IS-IS are correct? (Choose two.)

A) Level 1 intermediate systems exchange routing information with Level 1 intermediate systems on other IS-IS areas.
B) An IS-IS router sets the attached bit in the PDUs it sends to a Level 1 area to indicate that it is a backbone router.
C) A Level 1 router can only form adjacencies with other Level 1 routers.
D) Level 2 routers can form adjacencies with either Level 1 or Level 2 routers.

Question 17

Which three statements are true about the show pim join output shown in the exhibit? (Choose three.)

A) This is a source-specific multicast stream.
B) The multicast receiver is still using the RP to receive the stream.
C) The multicast stream has been configured with a backup path to allow for fast reroute.
D) The multicast stream does not have an RP.
E) The shortest path to the source is through the RP.

Question 18

You are provisioning Layer 2 circuits between sites CE1, CE2, and CE3. Referring to the exhibit, which statement is true?

A) A point-to-multipoint LSP must be created between sites.
B) Each site must have only one VLAN configured to the PE.
C) Site PE1 must have a point-to-multipoint link configured towards the core.
D) Two VLANs must be configured from PE 1 to CE 1.

Question 19

A customer wants to reduce LSP flooding in their IS-IS network. Which parameter should you change to accomplish this task?

A) [edit protocols isis] user@router# set spf-options rapid-runs 5
B) [edit protocols isis interface ] user@router# set csnp-interval 65535
C) user@router# set lsp-interval 1000
D) user@router# set mesh-group

Question 20

A network administrator is migrating from IPv4 to IPv6 and one of the IS-IS adjacencies is not coming up between R1 and R2. Which action will solve the problem?

A) Remove topologies ipv6-unicast from protocols isis on R2. Remove topologies ipv6-unicast from protocols isis on R2.
B) Configure topologies ipv4-unicast from protocols isis on R2. Configure topologies ipv4-unicast
C) Remove topologies ipv6-unicast from protocols isis on R1. on R1.
D) Configure an IPv4 address on interface ge-0/0/1 on R1. Configure an IPv4 address on interface ge-0/0/1

Question 21

Referring to the exhibit, a Layer 3 VPN is configured, however, the routes are being hidden. What is the problem?

A) The BGP peer is not reachable through the IGP.
B) An active MPLS tunnel does not exist between the peers.
C) A route distinguisher mismatch exists between the peers.
D) A VRF target community mismatch exists between the peers.

Question 22

All networks shown in the exhibit contain more than one BGP speaker. You operate ISP A and must ensure that Customer Y sends their traffic to you over the directly connected link. Customer Y is not to be used for transit into your network. What would you do to accomplish this task?

A) Advertise routes to Customer X with the custom defined 0:0 community.
B) Advertise routes to Customer X with the well-known no-advertise community.
C) Advertise routes to Customer Y with the custom defined 65535:65535 community.
D) Advertise routes to Customer Y with the well-known no-export community.

Question 23

R1 assigns incoming voice traffic to the ef forwarding class. All other traffic is assigned to the best-effort forwarding class. You have configured a CoS re-write rule on R1 to include the correct CoS bit values in packets sent towards R2. You want R2 to classify traffic using the CoS markings created by R1. Which two configuration steps are necessary to accomplish this task? (Choose two.)

A) Assign the behavior aggregate classifier to the ge-0/0/1.0 interface on R2.
B) Assign the CoS re-write rule to the ge-0/0/1.0 interface on R2.
C) Configure a CoS re-write rule on R2 and assign matching CoS values.
D) Configure a behavior aggregate classifier on R2.

Question 24

A network administrator is investigating why traffic from R2 is not being forwarded to R1. Referring to the show isis database command output shown in the exhibit, what is causing this problem on the network?

A) R1 and R2 are in different IS-IS areas.
B) The preferred interface between R1 and R2 is experiencing errors.
C) R1 is configured to drop all incoming traffic.
D) R2 is ignoring specific LSPs from R1 in its SPF calculations.

Question 25

You are receiving the same 200.0.0.0/24 BGP route from four different ISPs. Referring to the exhibit, which ISP's route would be selected as active?

A) ISP-B
B) ISP-A
C) ISP-C
D) ISP-D

Question 26

You are troubleshooting a problem with a BGP peer where BGP routes are not being accepted from that peer. Referring to the exhibit, which two statements are correct? (Choose two.)

A) Term 0 is missing a terminating action that allows BGP routes to be accepted.
B) Term 0 is missing a route-filter that specifies the allowed routes.
C) The reject at the end of the policy is preventing the routes from being accepted.
D) You cannot have terminating actions outside of terms.

Question 27

You have an established Layer 3 VPN between two PE devices. You are asked to only send certain routes from PE-1 over the VPN to the remote site while maintaining all the routes on the PE-1 device. You created a policy that matches the specific routes and then tags these routes with the appropriate target community values. In this scenario, which configuration changes must be made to satisfy the requirement?

A) Configure the export parameter and apply the policy to the my-ext-group BGP group configuration. Configure the export parameter and apply the policy to the my-ext-group BGP group configuration.
B) Configure the vrf-export parameter and apply the policy under the edit routing-instances vpn-a hierarchy. Configure the vrf-export parameter and apply the policy under the edit routing-instances vpn-a hierarchy.
C) Configure a RIB group and apply the policy as an import policy to routes distributed into the bgp.13vpn.0 routing table.
D) Configure the import parameter and apply the policy to the my-ext-group BGP group configuration. Configure the import parameter and apply the policy to the

Question 28

Refer ring to the exhibit, which two statements are correct for a route advertised by R1 towards R4? (Choose two.)

A) The BGP next hop is set to 14.1.1.1 by R2.
B) The AS path is set to 150 by R2.
C) The BGP next hop is set to 192.168.2.2 by R2.
D) The AS path is set to null by R2.

Question 29

You are considering different MPLS VPN connectivity options for a new customer deployment. Your customer requires shared LSPs, Layer 2 connectivity, and auto-provisioning. Which type of VPN satisfies the requirements?

A) BGP Layer 3 VPNs
B) circuit cross-connects
C) LDP Layer 2 circuits
D) BGP Layer 2 VPNs

Question 30

You have the Layer 2 VPN configuration shown in the exhibit. You are asked to determine the remote site ID for ge-1/0/1.512. In this scenario, what is the remote site ID?

A) 4
B) 5
C) 1
D) 3

Question 31

Referring to the exhibit, what will the IS-IS cost be for R3 to reach R1?

A) 301
B) 73
C) 20
D) 310

Question 32

What are two reasons an IBGP learned route would be hidden? (Choose two.)

A) The route is suppressed by damping.
B) The route has a next hop of the local routing device.
C) The route is rejected by an export policy.
D) The route has an empty AS path.

Question 33

Traffic is being sent from R2 to R3. The link between R2 and R3 fails. Referring to the exhibit, which statement is correct?

A) Traffic will automatically reroute using the shortest path, which is R2 to R1 to R3.
B) Traffic will automatically reroute distributed between all available paths.
C) Manual intervention is required for traffic to be rerouted.
D) Traffic will automatically reroute using R2 to R4 to R1 to R3.

Question 34

Your router should be configured with a rewrite rule which alters the default behavior of expedited forwarding as shown in the exhibit. In this scenario, which configuration is correct?

A)
B)
C)
D)

Question 35

Referring to the exhibit, which statement is true?

A) The BGP session between R1 and R2 will establish correctly and only the inet6 unicast NLRI will pass routing information.
B) The BGP session between R1 and R2 will fail to establish correctly due to an NLRI mismatch.
C) The BGP session between R1 and R2 will establish correctly and the inet unicast and the inet6 unicast NLRIs will pass routing information.
D) The BGP session between R1 and R2 will establish correctly and only the inet unicast NLRI will pass routing information.

Question 36

Referring to the exhibit, which path would traffic passing through R1 take to get to R6?

A) R1 -> R2 -> R4 -> R6
B) R1 -> R2 -> R3 -> R6
C) R1 -> R3 -> R5 -> R6
D) R1 -> R3 -> R4 -> R6

Question 37

Referring to the exhibit, which three statements about route 10.222/16 are correct when using the default BGP advertisement rules? (Choose three)

A) R1 will prepend AS10 when advertising 10.222/16 to R2.
B) R2 will prepend AS10 when advertising 10.222/16 to R7.
C) R2 will advertise 10.222/16 to R4 with itself as the next hop.
D) R1 will advertise 10.222/16 to R2 with itself as the next hop.
E) R7 will advertise 10.222/16 to R9 with itself as the next hop.

Question 38

You are using EVPN to provide Layer 2 stretched VLANs between two sites. You notice that the MAC addresses in either site are not showing up on the remote site. Referring to the exhibit, what are two ways to solve this problem? (Choose two.)

A) On R1, issue the set switch-options vrf-target target:65101:22030 command. On R1, issue the set switch-options vrf-target target:65101:22030 command.
B) On R2, issue the delete protocols evpn vni-options vni 22030 command. On R2, issue the delete protocols evpn vni-options vni 22030 command.
C) On R2, issue the set switch-options vrf-target target:65101:22030 command.
D) On R1, issue the set protocols evpn vni-options vni 22030 vrf-target target :65101:22030 command. set protocols evpn vni-options vni 22030 vrf-target target :65101:22030

Question 39

Referring to the exhibit, you want to reduce the CPU processing load on PE 2 by preventing the receipt of routes belonging to Customer B. In this scenario, which layer 3 VPN scaling mechanism provides this functionality?

A) route refresh
B) route origin
C) route reflection
D) route target filtering