Cisco CCNP Service Provider 350-501 Questions & Answers

• Question 291:

  An engineer implemented LDP protocol on the ISP network. The engineer must ensure that there are no packet loss issues when IGP and LDP protocols are not synchronized. Which configuration must the engineer implement so that the IGP routing protocol will wait until LDP convergence is completed?

  A. Disable MPLS LDP IGP synchronization on the network.

  B. Configure LDP sessions protection on the network.

  C. Disable IP CEF on routers running LDP and enable LDP protocol.

  D. Configure MPLS LDP IGP synchronization on the network.

  Correct Answer: D

• Question 292:

  What is a constraint of Cisco MPLS TE tunnel configurations?

  A. QoS-aware tunneling is not supported.

  B. Tunnels cannot be configured over IP unnumbered links.

  C. With ISIS as an IGP, only older-style metrics are used.

  D. Tunnels cannot span multiple OSPF areas.

  Correct Answer: D

• Question 293:

  An engineer is implementing MPLS OAM to monitor traffic within the MPLS domain. Which action must the engineer perform to prevent packets from being forwarded beyond the service provider domain when the LSP is down?

  A. Configure a private IP address as the destination address of the headend router of Cisco MPLS TE.

  B. Disable IP redirects only on outbound interfaces.

  C. Disable IP redirects on all ingress interfaces.

  D. Implement the destination address for the LSP echo request packet in the 127.x.y.z/8 network.

  Correct Answer: D

• Question 294:

  A network engineer has configured TE tunnels in the MPLS provider core. Which two steps ensure traffic traverse? (Choose two.)

  A. ECMP between tunnels allows RSVP to function correctly.

  B. The IGP metric of a tunnel is configured to prefer a certain path.

  C. A tunnel weight is configured in SPF database the same way as a native link.

  D. Static route is the only option for directing traffic into a tunnel.

  E. Forwarding adjacency feature allows a tunnel to be installed in the IGP table as a link.

  Correct Answer: BE

• Question 295:

  An engineer is implementing a Cisco MPLS TE tunnel to improve the streaming experience for the clients of a video-on-demand server. Which action must the engineer perform to configure extended discovery to support the MPLS LDP session between the headend and tailend routers?

  A. Configure a targeted neighbor session.

  B. Configure an access list on the interface to permit TCP and UDP traffic.

  C. Configure a Cisco MPLS TE tunnel on both ends of the session.

  D. Configure the interface bandwidth to handle TCP and UDP traffic between the LDP peers.

  Correct Answer: A

  Reference: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/mp_ldp/configuration/12-4m/mp-ldp-12-4m-book.pdf

• Question 296:

  Refer to the exhibit.

  

  A Cisco engineer is implementing gRPC dial-out on an ASR. Receiver 192.168.1.1 will be assigned one of the subscriptions, and it will manage the ASR. Which command is needed to complete the router configuration?

  A. protocol tcp

  B. protocol any

  C. protocol grpc

  D. protocol all

  Correct Answer: A

• Question 297:

  After implementing MPLS protocol for multiple VRFs on a single Cisco device, the engineer notices all VRFS on the router still do not have the LDP session protection feature enabled. Which configuration must the engineer apply to enable the LDP session protection feature for LDP neighbors within each VRF?

  A. Configure LDP session protection globally on the device only.

  B. Configure LDP session protection within the individual VRFs.

  C. Configure LDP session authentication on the device to enable LDP session protection on each VRF automatically.

  D. Configure LDP session protection globally on the device and on each neighbor that requires session protection.

  Correct Answer: A

  Reference: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/mp_ldp/configuration/xe-16-5/mp-ldp-xe-16-5-book/mp-ldp-sessn-prot.html

• Question 298:

  The network-engineering team of a service provider is integrating several recently acquired networks into a more scalable common Unified MPLS architecture. The new network architecture will support end-to-end VPNv4 and VPNv6 services with these requirements:

  1.

  The IGP of the core layer is IS-IS in Area 0.

  2.

  The IGP of the aggregation layers is OSPF in Area 0.

  3.

  The LDP protocol is used to distribute label bindings within each IGP domain.

  Which task must the network engineer perform when implementing this new architecture?

  A. Configure a BGP session between the ABR routers of each IGP domain to exchange VPNv4 or VPNv6 prefixes.

  B. Configure mutual redistribution of each IGP domain's loopback prefix to provide end-to-end LDP LSP.

  C. Configure the ABR in each IGP domain to preserve next-hop information on all VPNv4 and VPNv6 prefixes advertised by the PE.

  D. Configure BGP-LU between ABR routers of each IGP domain to carry MPLS label information in NLRI.

  Correct Answer: B

• Question 299:

  How is a telemetry session established for data analytics?

  A. A router initiates a session using the dial-out mode to a destination.

  B. A router requests the data using Telnet.

  C. The destination initiates a session using the dial-out mode to the router.

  D. A destination initiates a session to a router.

  Correct Answer: A

• Question 300:

  A network operator needs to implement PIM-SSM multicast configuration on a customer's network so that users in different domains are able to access and stream live traffic. Which two actions must the engineer perform on the network to make the streaming work? (Choose two.)

  A. Enable IGMP version 3 at the interface level.

  B. Enable PIM dense mode on the device.

  C. Enable PIM sparse mode on the device.

  D. Enable IGMP version 2 at the interface level.

  E. Configure at least one MSDP peer on the network.

  Correct Answer: AE