300-510 practice test

1. Question 1 · 1

   Refer to the exhibit. The green policy is designed with low delay, and the pink policy is designed with low cost. What is the next hop for node A on its way to node D, with the objective of achieving a low delay?

   Choose one answer.

   

   • 192.168.1.2
   • 192.168.3.2
   • 192.168.3.6
   • 192.168.1.6

2. Question 2 · 1

   Refer to the exhibit. CE1 and CE2 are iBGP neighbors in AS 65516. All traffic that exits AS 65516 must use the link from CE1 to PE1. CE1 is advertising a higher local preference to CE2, but traffic from CE2 still prefers the PE2 link. Which action corrects the problem?

   Choose one answer.

   

   • Add the lower local-preference value on PE2 towards CE2.
   • Configure CE1 to send routes to CE2 with a higher MED.
   • Configure CE1 to send routes to CE2 with a higher weight.
   • Add the next-hop self command to the CE1 neighbor statement for CE2.

3. Question 3 · 1

   Refer to the exhibit. Routers R1 and R2 reside in AS 65530, which is multihomed to the Internet. A network engineer expects devices in the AS to use R2 to access the Internet, but they are using R1 as the exit point from the AS. Which action corrects the problem?

   Choose one answer.

   

   • Add a sequence number to the route map to remove the implicit deny.
   • Change the route map direction in the neighbor statement to out.
   • Configure the route map with a local preference of 200 or higher.
   • Remove the neighbor statements from the address family configuration and activate the neighbor globally on R1.

4. Question 4 · 1

   Refer to the exhibit. What is the relationship between Router 1 and Router 2?

   Choose one answer.

   

   • Router 1 centrally learns the topology of the network to aid in SR-TE path selection, and Router 2 is a node that feeds Router 1 topology information
   • Router 1 and Router 2 are participating in SR-TE tunnels and are both head-end routers
   • Router 1 and Router 2 centrally learn the topology of the network to aid in SR-TE path selection for peers
   • Router 2 is the head-end router in an SR-TE tunnel, and it is learning topology of the network from the PCE enabled on Router 1

5. Question 5 · 1

   An engineer is working to implement segment routing protocol on the customer’s core network. Which step should the engineer take before the segment routing is enabled and is running with BGP?

   Choose one answer.

   • Segment routing must be configured with EIGRP
   • Segment routing must be configured with ISIS
   • MPLS must be configured
   • Explicit-null must be configured for all neighbors

6. Question 6 · 1

   Refer to the exhibits. A network operator is troubleshooting packet loss seen from the R1 loopback interface to the R2 loopback interface over the core network. The operator is attempting to identify the next leg in the path from PE1. Which interface and label path should the operator investigate next?

   Choose one answer.

   

   • PE1 – Gi0/0/0/2 – forwarding label 24001
   • PE1 – Gi0/0/0/3 – forwarding label 24002
   • PE1 – Gi0/0/0/2 – forwarding label 24002
   • PE1 – Gi0/0/0/3 – forwarding label 24001

7. Question 7 · 1

   Refer to the exhibit. An MPLS core network has connectivity issues R4 has failed. It impacts traffic loss between R1 and R8. Customers report no access to their file servers, which delays their transformation work. Which quick action resolves the issue until R4 recovers?

   Choose one answer.

   

   • Implement Link and Node protection on routers R2 and R7.
   • Disable traffic engineering so that traffic prefers the IGP path
   • Enable MPLS ТЕ fast reroute on router R1 and Link and Node protection on router R2.
   • Configure IBGP full mesh for faster convergence.

8. Question 8 · 1

   Refer to the exhibit. An engineer is troubleshooting connectivity issues on the MPLS core network. A customer connected through R4 cannot reach the OSPF domain on R5. While checking the routing table of R1, the engineer cannot see all the routes from R3 and R5. Which task must the engineer perform so that R4 is able to reach R5?

   Choose one answer.

   

   • Enable OSPF peering and configure route redistribution between routers R4 and R1.
   • Enable route filtering between routers R1 and R3.
   • Enable MP-BGP peering on routers R1, R3, R4, and R5.
   • Enable OSPF on the Area-0 routers and configure MP-BGP between routers R1 and R3.

9. Question 9 · 1

   Refer to the exhibit. When implementing SRv6, which SID does R2 propagate into area 0 for the prefix 2001:DB8:1:1/128?

   Choose one answer.

   

   • 120
   • 230
   • 110
   • 10

10. Question 10 · 1

    Refer to the exhibit. VPN users that are connected to PE routers are facing network issues. Traffic that originates from CE1 drops before reaching CE2. An engineer finds no outgoing traffic statistics on PE1 and PE2 routers toward CE devices and finds that the PE1 router is running the older software image. Which action must be implemented to resolve the issues?

    Choose one answer.

    

    

    • Enable LDP protocol on PE1 and PE2 routers.
    • Advertise P1 router loopback on PE1 in OSPF.
    • Enable CEF-based forwarding on PE1 router.
    • Advertise PE2 router loopback on PE1 in OSPF.

11. Question 11 · 1

    Refer to the exhibit. Company A established BGP sessions with several ISPs. A network engineer at the company must filter out all traffic except for routes that transit AS 152. The engineer configured the filtering policy "permit _152$_(_[0-9])" on R1, but after applying the configuration, the engineer notices that other routes are still visible. Which action resolves the issue?

    Choose one answer.

    

    • Add a second filtering policy in the format ip access-list 1 permit ^152_([0-9]+).
    • Add a second filtering policy in the format ip prefix-list 1 permit ^152^.
    • Change the filtering policy to ip explicit-path 1 permit $152^.
    • Change the filtering policy to ip as-path access-list 1 permit _152_.

12. Question 12 · 1

    Refer to the exhibit. Networks 172.16.31.0/24 and 172.16.30.0/24 are advertised in area 34, and network 172.22.10.0/24 is advertised in area 0. A recent security review discovered that users connected to routers R1 and R2 have been making unauthorized access to an application running on network 172.16.31.0/24. An engineer determined that routers R1 and R2 are receiving updates for network 17.16.31.0/24. Which action resolves the issue?

    Choose one answer.

    

    • Apply route filtering on routers R3 and R4.
    • Apply route filtering on routers R1 and R2.
    • Apply route filtering on router R3 only.
    • Apply route filtering on router R4 only.

13. Question 13 · 1

    Refer to the exhibit. A network engineer just replaced five routers on this OSPF network. When the routing protocol is brought up, R5 cannot reach routes that originate on R1. The engineer verified that all connected links have established neighbor relationships. R5 reaches routes originating on R3 and R4. Which action resolves the issue?

    Choose one answer.

    

    • Configure each link to be point-to-point.
    • Configure an OSPF virtual link to bridge Area 0 on routers R3 and R4.
    • Configure automatic neighbor discovery on R1 and R5.
    • Configure OSPF to have a contiguous Area 0.

14. Question 14 · 1

    Which difference must an engineer consider when implementing inter-domain and intra-domain multicast routing on the network?

    Choose one answer.

    • Intra-domain routing is dependent on the RP router within the same SP network, but inter-domain routing reduces the dependency on the other SP network.
    • Intra-domain routing allows the service provider to control incoming and outgoing multicast data streams on its network, but inter-domain routing limits the service provider's control.
    • Inter-domain routing supports policy routing to connect different multicast domains using PIM-SM, but intra-domain routing supports policy routing using PIM-SM only within a single domain.
    • Intra-domain routing uses the PIM and MBGP protocols for multicast routing, but inter-domain routing must use PIM-SSM or MSDP.

15. Question 15 · 1

    An ISP has an MPLS VPN-based network with 12 PE routers. How many peerings are required between the 12 routers if the engineer has not configured route reflectors?

    Choose one answer.

    • 60
    • 66
    • 78
    • 84

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