Question 6 of 105

Which statement about enabling segment routing for IGPs is true?

    Correct Answer: B

    Segment routing must first be enabled globally and then under the routing process. This ensures that segment routing capabilities are established at the global level before they are fine-tuned or applied within individual routing processes.

Question 7 of 105

Refer to the exhibit. Router 1 is a core ABR in a Cisco Unified MPLS environment. All of the router 1 BGP peers are established, but traffic between customers is failing. Which BGP configuration must be added to the configuration?

    Correct Answer: C

    In a Cisco Unified MPLS environment, when traffic between customers is failing despite all BGP peers being established, it is crucial to ensure that the BGP configuration includes the capability to send labels. MPLS relies on label switching to forward packets through the network, and BGP needs to exchange these MPLS labels to route the traffic appropriately. Configuring BGP with send labels will allow the router to distribute and utilize MPLS labels, ensuring proper traffic flow between customers.

Question 8 of 105

Refer to the exhibit. R1 is directly connected to R2 and R3. R1 is in BGP AS 123, R2 is in BGP AS 2, and R3 is in BGP AS 3. Assume that there is no connectivity issue between R1, R2 and R1, R3. Which result between BGP peers R1, R2 and R1, R3 is true?

    Correct Answer: D

    R1 is configured with a peer-group named TEST and has neighbored R2 and R3 using this group. However, R2 is in AS 2 and R3 is in AS 3. The alternate-as configuration allows R1 to accept R3's BGP session even though it is in a different AS. However, R2 does not have an alternate AS configuration, meaning it requires a direct AS match with R1's AS 123 to establish a session. Therefore, the BGP session will only come up between R1 and R2, but not between R1 and R3.

Question 9 of 105

Which two conditions must be met before separate ISPs can provide interdomain multicast routing? (Choose two.)

    Correct Answer: A, E

    Each ISP must configure MSDP to connect its individual multicast administrative domain to the domains at other ISPs, ensuring multicast source information can be shared between the ISPs. Additionally, each ISP must support intradomain multicast routing to ensure that multicast traffic can be routed within their own networks before it can be shared with other ISPs. These two conditions ensure seamless interdomain multicast routing.

Question 10 of 105

An engineer is troubleshooting a connectivity issue across the MPLS network and is verifying the forwarding behavior of packets. Which table does the engineer look at to verify the forwarding behavior of an IP packet as it enters the MPLS network at the ingress LSR?

    Correct Answer: D

    To verify the forwarding behavior of an IP packet as it enters the MPLS network at the ingress Label Switch Router (LSR), the engineer should look at the Forwarding Information Base (FIB). The FIB is used for making routing decisions based on destination addresses for incoming IP packets. When an IP packet enters the network, the ingress LSR will use the FIB to determine the appropriate outgoing label and the next hop. The Label Forwarding Information Base (LFIB) is utilized for packet forwarding based on labels, which comes into play once the packet has already been labeled.