Enterprise Routing and Switching, Specialist (JNCIS-ENT) practice questions

1. Question 1 of 25

   

   Referring to the exhibit, which router will become the OSPF BDR if all routers are powered on at the same time?

   • AR4
   • BR1
   • CR3
   • DR2

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   Correct answer: C

   How others answered

   • C92%
   • A8%

2. Question 2 of 25

   

   What is the management IP address of the device shown in the exhibit?

   • A10.210.20.233
   • B172.23.12.100
   • C128.0.0.1
   • D172.23.11.10

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   Correct answer: A

   How others answered

   • A100%

3. Question 3 of 25

   Select 3

   Which three protocols support BFD? (Choose three.)

   • ARSTP
   • BBGP
   • COSPF
   • DLACP
   • EFTP

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   Correct answer: B, C, D

   How others answered

   • BCD100%

4. Question 4 of 25

   Which statement is correct about graceful Routing Engine switchover (GRES)?

   • AThe PFE restarts and the kernel and interface information is lost.
   • BGRES has a helper mode and are starting mode.
   • CWhen combined with NSR, routing is preserved and the new master RE does not restart rpd.
   • DWith no other high availability features enabled, routing is preserved and the new master RE does not restart rpd.

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   Correct answer: C

   How others answered

   • C100%

5. Question 5 of 25

   Which statement is correct about controlling the routes installed by a RIB group?

   • AAn import policy is applied to the RIB group.
   • BOnly routes in the last table are installed
   • CA firewall filter must be configured to install routes in the RIB groups.
   • DAn export policy is applied to the RIB group.

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   Correct answer: A

   How others answered

   • A100%

6. Question 6 of 25

   Select 2

   

   You are using OSPF to advertise the subnets that are used by the Denver and Dallas offices. The routers that are directly connected to the Dallas and Denver subnets are not advertising the connected subnets. Referring to the exhibit, which two statements are correct? (Choose two.)

   • ACreate static routes on the switches using the local vMX router's loopback interface for the next hop.
   • BConfigure and apply a routing policy that redistributes the Dallas and Denver subnets using Type 5 LSAs.
   • CConfigure and apply a routing policy that redistributes the connected Dallas and Denver subnets.
   • DEnable the passive option on the OSPF interfaces that are connected to the Dallas and Denver subnets.

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   Correct answer: C, D

   How others answered

   • CD63%
   • BC38%

   Only 63% agreed on this answer — treat it as contested rather than settled.

7. Question 7 of 25

   Select 2

   

   You want to verify prefix information being sent from 10.36.1.4. Which two statements are correct about the output shown in the exhibit? (Choose two.)

   • AThe routes displayed have traversed one or more autonomous systems.
   • BThe output shows routes that were received prior to the application of any BGP import policies.
   • CThe output shows routes that are active and rejected by an import policy.
   • DThe routes displayed are being learned from an IBGP peer.

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   Correct answer: A, B

   How others answered

   • AB63%
   • AD21%
   • A11%
   • AC5%

   Only 63% agreed on this answer — treat it as contested rather than settled.

8. Question 8 of 25

   What is the default keepalive time for BGP?

   • A10 seconds
   • B60 seconds
   • C30 seconds
   • D90 seconds

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   Correct answer: C

   How others answered

   • C88%
   • B6%
   • A6%

9. Question 9 of 25

   Select 2

   Which two statements are correct about tunnels? (Choose two.)

   • ABFD cannot be used to monitor tunnels.
   • BTunnel endpoints must have a valid route to the remote tunnel endpoint.
   • CIP-IP tunnels are stateful.
   • DTunnels add additional overhead to packet size.

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   Correct answer: B, D

   How others answered

   • BD100%

10. Question 10 of 25

    Which statement is correct about IP-IP tunnels?

    • AIP-IP tunnels only support encapsulating IP traffic.
    • BIP-IP tunnels only support encapsulating non-IP traffic.
    • CThe TTL in the inner packet is decremented during transit to the tunnel endpoint.
    • DThere are 24 bytes of overhead with IP-IP encapsulation.

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    Correct answer: A

    How others answered

    • A67%
    • C33%

    Only 67% agreed on this answer — treat it as contested rather than settled.

11. Question 11 of 25

    Select 2

    You are configuring an IS-IS IGP network and do not see the IS-IS adjacencies established. In this scenario, what are two reasons for this problem? (Choose two.)

    • AMTU is not at least 1492 bytes.
    • BIP subnets are not a /30 address.
    • CThe Level 2 routers have mismatched areas.
    • DThe Io0 interface is not included as an IS-IS interface.

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    Correct answer: A, D

    How others answered

    • AD100%

12. Question 12 of 25

    Select 2

    You are asked to create a new firewall filter to evaluate Layer 3 traffic that is being sent between VLANs. In this scenario, which two statements are correct? (Choose two.)

    • AYou should create a family Ethernet-switching firewall filter with the appropriate match criteria and actions.
    • BYou should apply the firewall filter to the appropriate VLAN.
    • CYou should create a family inet firewall filter with the appropriate match criteria and actions.
    • DYou should apply the firewall filter to the appropriate IRB interface.

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    Correct answer: C, D

    How others answered

    • CD100%

13. Question 13 of 25

    Select 2

    

    You are a network operator troubleshooting BGP connectivity. Which two statements are correct about the output shown in the exhibit? (Choose two.)

    • APeer 10.32.1.2 is configured for AS 63645.
    • BThe BGP session is not established.
    • CThe R1 is configured for AS 65400.
    • DThe routers are exchanging IPv4 routes.

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    Correct answer: C, D

    How others answered

    • CD81%
    • BD13%
    • BC6%

14. Question 14 of 25

    What is the maximum allowable MTU size for a default GRE tunnel without IPv4 traffic fragmentation?

    • A1496 bytes
    • B1480 bytes
    • C1500 bytes
    • D1476 bytes

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    Correct answer: D

    How others answered

    • D100%

15. Question 15 of 25

    Select 2

    You are troubleshooting a BGP routing issue between your network and a customer router and are reviewing the BGP routing policies. Which two statements are correct in this scenario? (Choose two.)

    • AExport policies are applied to routes in the RIB-In table.
    • BImport policies are applied to routes in the RIB-Local table.
    • CImport policies are applied after the RIB-In table.
    • DExport policies are applied after the RIB-Local table.

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    Correct answer: C, D

    How others answered

    • CD100%

16. Question 16 of 25

    You are asked to connect an IP phone and a user computer using the same interface on an EX Series switch. The traffic from the computer does not use a VLAN tag, whereas the traffic from the IP phone uses a VLAN tag. Which feature enables the interface to receive both types of traffic?

    • Anative VLAN
    • BDHCP snooping
    • CMAC limiting
    • Dvoice VLAN

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    Correct answer: D

    How others answered

    • D86%
    • A14%

17. Question 17 of 25

    

    The ISP1.inet.0 route table has currently no routes in it. What will happen when you commit the configuration shown on the exhibit?

    • AThe inet.0 route table will be completely overwritten by the ISP1.inet.0 route table.
    • BThe inet.0 route table will be imported into the ISP1.inet.0 route table.
    • CThe ISP1.inet.0 route table will be completely overwritten by the inet.0 route table.
    • DThe ISP1.inet.0 route table will be imported into the inet.0 route table.

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    Correct answer: B

    How others answered

    • B100%

18. Question 18 of 25

    

    Your ISP is announcing a default route to both R1 and R2. You want your network routers to forward all Internet traffic through the R1 device. Which BGP attribute would you use?

    • AMED
    • Bnext-hop
    • Clocal preference
    • Dorigin

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    Correct answer: C

    How others answered

    • C100%

19. Question 19 of 25

    Select 2

    Which two BGP attributes must be supported by all BGP implementations and must be included in every update? (Choose two.)

    • AAS path
    • BMED
    • Cnext hop
    • Dcommunity

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    Correct answer: A, C

    How others answered

    • AC100%

20. Question 20 of 25

    

    Your BGP neighbors, one in the USA and one in France, are not establishing a connection with each other. Referring to the exhibit, which statement is correct?

    • AThe BFD liveness is set too low.
    • BThe BFD liveness must be configured on the BGP neighbor.
    • CThe BFD liveness must be configured on the BGP group.
    • DThe BFD liveness is set too high.

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    Correct answer: A

    How others answered

    • A70%
    • C20%
    • B10%

    Only 70% agreed on this answer — treat it as contested rather than settled.

21. Question 21 of 25

    Select 2

    You need to configure a LAG between your switches. In this scenario, which two statements are correct? (Choose two.)

    • ADuplex and speed settings are not required to match on both participating devices.
    • BDuplex and speed settings are required to match on both participating devices.
    • CMember links are not required to be contiguous ports.
    • DMember links are required to be contiguous ports.

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    Correct answer: B, C

    How others answered

    • BC100%

22. Question 22 of 25

    

    What does the * indicate in the output shown in the exhibit?

    • AThe switch ports have a router attached.
    • BThe interface is down.
    • CThe interface is active.
    • DAll interfaces have elected a root bridge.

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    Correct answer: C

    How others answered

    • C100%

23. Question 23 of 25

    You have two OSPF routers forming an adjacency. R1 has a priority of 32 and a router ID of 192.168.1.2. R2 has a priority of 64 and a router ID of 192.168.1.1. The routers were started at the same time and all other OSPF settings are the default settings. Which statement is correct in this scenario?

    • AAt least three routers are required for a DR/BDR election.
    • BRouter IDs must match for an adjacency to form.
    • CR2 will be the BDR.
    • DR1 will be the BDR.

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    Correct answer: D

    How others answered

    • D100%

24. Question 24 of 25

    

    You have configured the four EX Series switches with RSTP, as shown in the exhibit. You discover that whenever a link between switches goes up or down, the switches take longer than expected for RSTP to converge, using the default settings. In this scenario, which action would solve the delay in RSTP convergence?

    • AThe hello-time must be increased.
    • BThe force-version must be removed.
    • CThe bridge priority for EX-4 must be set at 4000.
    • DThe max-age must be increased to 20.

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    Correct answer: B

    How others answered

    • B100%

25. Question 25 of 25

    Select 2

    Which two statements correctly describe RSTP port roles? (Choose two.)

    • AThe designated port forwards data to the downstream network segment or device.
    • BThe backup port is used as a backup for the root port.
    • CThe alternate port is a standby port for an edge port.
    • DThe root port is responsible for forwarding data to the root bridge.

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    Correct answer: A, D

    How others answered

    • AD100%

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JN0-351 practice, question 1 of 25