Cisco CCNP Service Provider 350-501 Questions & Answers

• Question 11:

  Which role does the Adjacency-SID sub-TLV extension perform in the IS-IS routing protocol?

  A. It is advertised within TLV-136 (Extended IP Reachability) to label a specific node in the network.

  B. It is advertised within TLV-145 (IS-IS Prefix Reachability Information) to label host prefixes on loopback interfaces on Level 2 routers within one IS-IS area

  C. It is advertised within TLV-24 (IS-IS Neighbor Adjacency Attribute) to label a specific adjacency between Level 1 routers within one IS-IS area

  D. It is advertised within TLV-22 (Extended IS Reachability) to label a specific link in a segment routing domain

  Correct Answer: D

  Explanation:

  A new IS-IS sub-TLV is defined: the Adjacency Segment Identifier (Adj-SID) sub-TLV.

  The Adj-SID sub-TLV is an optional sub-TLV carrying the Segment Routing IGP-Adjacency-SID as defined in [RFC8402] with flags and fields that may be used, in future extensions of Segment Routing, for carrying other types of SIDs.

  IS-IS adjacencies are advertised using one of the IS Neighbor TLVs below:

  TLV-22 (Extended IS reachability) [RFC5305]

  TLV-222 (MT-ISN) [RFC5120]

  TLV-23 (IS Neighbor Attribute) [RFC5311]

  TLV-223 (MT IS Neighbor Attribute) [RFC5311]

  TLV-141 (inter-AS reachability information) [RFC5316]

  Multiple Adj-SID sub-TLVs MAY be associated with a single IS Neighbor.

• Question 12:

  Which capability does the MPLS TE FRR facility backup protection method provide?

  A. creating a bypass LSP for each protected LSP at each point of local repair

  B. assigning a backup TE LSP tunnel to the protected node at the headend of the protected TE LSP

  C. leveraging label stacking to protect selected TE LSPs using a single backup TE LSP

  D. defining the set of characteristics for the backup TE LSP

  Correct Answer: A

  Reference: https://www.cisco.com/c/en/us/td/docs/routers/ios/config/17-x/mpls/b-mpls/m_mp-te-frr-node-prot-0.html

• Question 13:

  

  Refer to the exhibit. A network engineer is implementing BGP in AS 65101 and AS 65201 R3 sends data traffic to 192.168.1.1/32 via the path R3-R2-R1. The traffic must travel via alternate path R6-R5 for prefix 192.168.1.1/32. Which action must be taken to meet the requirement?

  A. Apply route-map HIGH-MED out on R2 for neighbor R3

  B. Apply route-map HIGH-LP in on R3 for neighbor R6

  C. Apply route-map LOW-MED in on R5 for neighbor R2

  D. Apply route-map LOW-LP out on R2 for neighbor R3

  Correct Answer: B

• Question 14:

  Which fact must a network engineer consider when planning to deploy RSVP-TE FRR?

  A. PLR prefers FRR NHOP backup tunnels over NNHOP tunnels

  B. FRR protects MPLS LDP and RSVP-TE LSPs

  C. The FRR backup tunnel reserves the total bandwidth of all protected tunnels

  D. PLR prefers FRR NNHOP backup tunnels over NHOP tunnels

  Correct Answer: D

  Reference: https://www.cisco.com/en/US/docs/ios-xml/ios/mp_te_path_protect/configuration/15-1s/mp-link-node-prot.html

• Question 15:

  What is an enhancement that Cisco IOS XE Software has over Cisco IOS Software?

  A. It is built on a QNX Neutrino Microkernel

  B. It allows all processes to use the same pool of memory

  C. It runs on a 32-bit operating system

  D. It supports symmetric multiprocessing

  Correct Answer: D

  Reference: https://layer3life.wordpress.com/2018/02/08/ios-xe-xr-nx-os/#:~:text=Thanks%20to%20the%20feature%20set,same%20as%20traditional%20Cisco%20IOS.

• Question 16:

  

  Refer to the exhibit. A service provider engineer is configuring the connection between CE1 and CE2. AS 200 of the service provider and AS 100 of enterprise ABC should connect using BGP. The engineer already completed the configuration of VRF RT 100:10 of enterprise ABC. Which configuration must the engineer apply on PE1 to meet the requirement?

  

  A. Option A

  B. Option B

  C. Option C

  D. Option D

  Correct Answer: A

• Question 17:

  

  Refer to the exhibit. Routers R1 through R5 are being deployed within the core of a service provider running BGP. The core supports distribution of VPNv4 routes using MPLS. R3 currently has multiple paths to reach R4. A network engineer must implement BGP attributes so that R3 can reach R4 via R1. Which action must the engineer take to meet the requirement?

  A. Configure R3 so the route to R4 through R1 will have a higher weight than the route from R2 or R5.

  B. Configure R2 to send the route from R4 to R1 using a higher metric than what is advertised to R3.

  C. Configure R3 so the route to R4 through R1 will have a lower local preference than the route from R2 or R5.

  D. Configure R5 to send the route from R4 to R1 using a longer AS path than the AS path that it receives from R1 or R2.

  Correct Answer: A

• Question 18:

  A network architect must implement CSC VPN services for a new backbone earner. Which two benefits does the architecture provide? (Choose two.)

  A. It leverages IPsec to establish connections within the backbone, which eliminates the need for BGP to distribute routes.

  B. It supports a scalable growth strategy that services multiple customers efficiently.

  C. It relies on IP communications, which simplifies the network design.

  D. It eliminates the need to maintain a centralized network-maintenance and operations strategy.

  E. It maintains a single backbone, which simplifies the VPN implementation to customers.

  Correct Answer: BE

  Reference: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/mp_ias_and_csc/configuration/15-s/mp-ias-and-csc-15-s-book/mp-carrier-ldp-igp.html

• Question 19:

  A network operator with an employee ID: 1516:11:567 must implement a PIM-SSM multicast configuration on the customer's network so that users in different domains are able to access and stream live traffic. The IGMP version must be enabled to support the SSM implementation. Which action must the engineer perform on R1 to complete the SSM implementation?

  

  A. Option A

  B. Option B

  C. Option C

  D. Option D

  Correct Answer: B

  Reference: https://www.cisco.com/en/US/docs/switches/lan/catalyst3850/software/release/3se/consolidated_guide/b_consolidated_3850_3se_cg_chapter_0100111.html

• Question 20:

  The NOC engineer in a service provider network must configure an SNMP community on switch SW with these security attributes:

  Event messages must be authenticated with the MD5 algorithm and encrypted. The remote user name for the SNMP server at 172.16.10.1 is AuthNocUser. Which configuration must the engineer apply to the switch?

  

  A. Option A

  B. Option B

  C. Option C

  D. Option D

  Correct Answer: B