Cisco CCNP Service Provider 350-501 Questions & Answers

• Question 101:

  A new PE router is configured to run OSPF as an IGP with LDP on all interfaces. The engineer is trying to prevent black holes after convergence when the PERSON device loses an LDP session with other PE routers. Which action must the engineer take to implement LDP session protection on a new PE router?

  A. Configure the mpls ldp session protection and mpls label protocol ldp commands on the interfaces on the new PE router that connect to the CENTER routers.

  B. Configure the mpls ldp discovery targeted-hello accept and mpls ldp session protection commands on the interfaces on the new PE router that connect to the CE routers.

  C. Configure the new PE router with the mpls ldp session protection command and on neighboring routers that connect to this new PE router.

  D. Configure the new PE router with the mpls ldp session protection command on interfaces with directly connected neighbors.

  Correct Answer: C

• Question 102:

  Refer to the exhibit.

  

  A network engineer is implementing multicast services on CPE-1 and CPE-2. CPE-1 must be configured as the preferred IGMP querier for the LAN segment. PIM-SM must be implemented on the LAN interfaces with an IGMP version that supports (*, G) joins only. Which configurations must the engineer implement on CPE-1 and CPE-2?

  A. On CPE-1:

  interface GigabitEthernet0/1

  ip address 10.0.12.129 255.255.255.128

  ip pim sparse-mode

  ip igmp version 2

  On CPE-2:

  interface GigabitEthernet0/1

  ip address 10.0.12.130 255.255.255.128

  ip pim sparse-mode

  ip igmp version 2

  B. On CPE-1:

  interface GigabitEthernet0/1

  ip address 10.0.12.130 255.255.255.128

  ip pim sparse-mode

  ip igmp version 3

  On CPE-2:

  interface GigabitEthernet0/1

  ip address 10.0.12.129 255.255.255. 128

  ip pim sparse-mode

  ip igmp version 3

  C. On CPE-1:

  interface GigabitEthernet0/1

  ip address 10.0.12.130 255.255.255.128

  ip pim sparse-mode

  ip igmp version 2

  On CPE-2:

  interface GigabitEthernet0/1

  ip address 10.0.12.129 255.255.255.128

  ip pim sparse-mode

  ip igmp version 2

  D. On CPE-1:

  interface GigabitEthernet0/1

  ip address 10.0.12.129 255.255.255.128

  ip pim sparse-mode

  ip igmp version 3

  On CPE-2:

  interface GigabitEthernet0/1

  ip address 10.0.12.130 255.255.255.128

  ip pim sparse-mode

  ip igmp version 3

  Correct Answer: A

• Question 103:

  An engineering team must implement Unified MPLS to scale an MPLS network. Devices in the core layer use different IGPs, so the team decided to split the network into different areas. The team plans to keep the MPLS services as they are and introduce greater scalability. Which additional action must the engineers take to implement the Unified MPLS?

  A. Redistribute the IGP prefixes from one IGP into the other routers to ensure end-to-end LSPs.

  B. Configure the ABR routers as route reflectors that redistribute IGP into BGP.

  C. Redistribute the IGP prefixes into another IGP to ensure end-to-end LSPs.

  D. Move the IGP prefixes into IS-IS as the loopback prefixes of the PE routers to distribute the prefixes to other routers to create end-to-end LSPs.

  Correct Answer: C

• Question 104:

  Which OS uses a distributed subsystem architecture?

  A. IOS XE

  B. IOS

  C. IOS XR

  D. CatOS

  Correct Answer: C

• Question 105:

  Refer to the exhibit.

  

  ISP A provides MPLS L3VPN service to customer A with BGP as the external routing protocol. Customer A has just opened a new branch office in London and requested the service provider to implement lossless service between its two offices. The LDP is enabled over the MPLS backbone and label exchange is working normally. Which action must the ISP engineering team take to enable the service?

  A. Configure LDP and redistribute the route from EIGRP.

  B. Configure BGP address family VPNv4.

  C. Configure IGP and redistribute the route from BGP.

  D. Configure IGP LDP synchronization

  Correct Answer: D

• Question 106:

  How does Cisco DNA Center enhance network automation?

  A. It allows network administrators to quickly deploy Cisco Layer 2 devices without requiring STP and broadcast transport.

  B. It allows network administrators to reduce inconsistencies when they deploy and validate network configurations.

  C. It allows network administrators to reduce the number of VRFs in a multi customer environment by automatically implementing a single VLAN per customer.

  D. It allows network administrators to combine voice and data networks into a single topology without manual configuration.

  Correct Answer: B

• Question 107:

  How does an untrusted interface at the boundary of an administrative domain handle incoming packets?

  A. It remarks all values to a CoS of 0.

  B. It forwards only traffic with a DSCP value of 48.

  C. It translates the IP precedence value to the corresponding DSCP value.

  D. It drops all traffic ingressing the network.

  Correct Answer: A

• Question 108:

  Refer to the exhibit.

  

  A network engineer wants to monitor traffic from the application server and send the output to the external monitoring device at 172.16.20.5. Application server traffic should pass through the R1 Eth2/1 interface for further analysis after it is monitored. Which configuration must be applied on the R1 router?

  A. Configure the FLOW-MONITOR-20 command.

  B. Configure the flow exporter EXPORTER-10 destination 192.168.20.4 command.

  C. Configure the ip flow monitor FLOW-MONITOR-10 input command on the Ethernet1/0 interface.

  D. Configure the ip flow monitor FLOW-MONITOR-10 output command on the Ethernet 2/1 interface.

  Correct Answer: C

• Question 109:

  Which two features describe TI-LFA? (Choose two.)

  A. TI-LFA uses PQ or P and Q nodes on the post-convergence path to compute the backup path.

  B. Post-convergence, TI-LFA considers the next-hop neighbor to calculate the backup repair path.

  C. TI-LFA works with point of local repair when the PQ node supports only LDP capability.

  D. Unlike RLFA, TI-LFA works without the PQ node and provides double segment failure protection.

  E. TI-LFA leverages the post-convergence path that carries data traffic after a failure.

  Correct Answer: AE

• Question 110:

  How does SR policy operate in Segment Routing Traffic Engineering?

  A. An SR policy for color and endpoint is deactivated at the headend as soon as the headend learns a valid candidate path for the policy.

  B. When "invalidation drop" behavior occurs, the SR policy forwarding entry is removed and the router drops all traffic that is steered into the SR policy.

  C. When a set of SID lists is associated with the SR policy designated path, traffic steering is ECMP-based according to the qualified cost of each SID-list.

  D. An active SR policy installs a BSID-keyed entry in the forwarding table to steer the packets that match the entry to the SR policy SID-list.

  Correct Answer: D