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2021 Mar 400-201 free exam

Q81. An engineer is troubleshooting Precision Time Protocol on Cisco ASR 9000 router and noticed the protocol is running in a Multicast mode. Which two results regarding the messages can the engineer expect? (Choose two) 

A. IPTP messages that use unicast messages and those that use multicast messages must be specified. 

B. Announce and Sync messages are sent as multicast messages. 

C. Signaling. Delay-Request and Delay-Response messages are sent as multicast messages 

D. All messages for PTP will be sent as multicast messages 

E. Announce and Sync messages are sent as unicast messages 

F. Signaling, Delay-Request, and Delay-Response messages are sent as unicast messages 

Answer: B,F 


Q82. In a routing virtualization concept, which are the two main techniques for creating virtualized router entities as defined by their physical and operational characteristics? (Choose two.) 

A. VDC 

B. SVR 

C. DRP 

D. HVR 

E. SDR 

Answer: B,D 

Explanation: 

http://www.cisco.com/en/US/solutions/collateral/ns341/ns524/ns562/ns573/white_paper_c1 1-512753_ns573_Networking_Solutions_White_Paper.html 


Q83. Which information is carried in the OSPFv3 intra-area Prefix LSA? 

A. All link-local addresses 

B. All IPv6 prefix and topology information that OSPFv2 included in Router LSA and Network LSA 

C. List of options associated with the link to all other routers attached to the link 

D. All prefix-specific information that OSPFv2 included in Router LSA and Network LSA 

Answer: D 

Explanation: 

OSPFv3's new LSA, the Intra-area Prefix LSA (type 9), handles intra-area network information that was previously included in OSPFv2 type 2 LSAs. It is used in order to advertise one or more IPv6 prefixes. The prefixes are associated with router segment, stub network segment or transit network segment. Intra-area prefix LSAs (type 9) & Inter-Area-Prefix-LSA (type 3) carry all IPv6 prefix information, which, in IPv4, is included in router LSAs and network LSAs. 


Q84. Refer to the exhibit. 

MPLS VPN service has been provisioned for a customer by using inter-AS MPLS Option C. It is possible to redistribute ISP1 and ISP2 received loopback addresses into the local IGP. How many labels are associated with packet forwarding between the ASBRs? 

A. 0 

B. 1 

C. 2 

D. 3 

E. 4 

Answer: C 


Q85. Which BGP feature improves the convergence and response time to adjacency changes with BGP neighbors? 

A. reducing BGP scanner timing to the minimum that is supported 

B. BGP Multihop 

C. Next-Hop Address Tracking 

D. Fast Peering Session Deactivation 

E. TTL Security Check 

Answer: C 

Explanation: http://www.cisco.com/c/en/us/td/docs/ios/12_2sb/feature/guide/sbbnhop.html 


Regenerate 400-201 free practice test:

Q86. Refer to the exhibit. 

A service provider is running MPLS TE across its network. IS-IS is deployed as the IGP for the ISP network. The MPLS TE tunnel 0 configured on PE2 is seen in an operational down state. PE2 is a level-1 router and the destination 192.168.1.1 is located in the IS-IS level-2 area. Which action is required to bring the MPLS TE tunnel 0 to up state? 

A. Configure the next-address entries as loose paths in the explicit-path. 

B. Change the autoroute option from destination to announce. 

C. Configure a bandwidth value for the tunnel. 

D. Configure an IPv4 address for the Tunnel 0. 

E. Add a dynamic path option to the tunnel. 

Answer: A 


Q87. An engineer wants to configure MPLS TE Fast Reroute with link protection on five routers. Which methodology can reduce configuration on the point of the local repair router and successfully complete the task? 

A. Configure a backup tunnel on the PLR. 

B. Enable the autotunnel backup feature. 

C. Configure a backup tunnel on the tunnel head end router. 

D. Enable the autotunnel primary feature. 

Answer: B 

Explanation: http://www.cisco.com/c/en/us/td/docs/routers/crs/software/crs_r4-2/mpls/configuration/guide/b_mpls_cg42crs/b_mpls_cg42crs_chapter_0100.html#concept_ F19BEEEFC831436AAC9291A87F9B34E5 


Q88. Refer to the exhibit. 

The NOC engineer noticed that the R2 router system clock is not updated and synchronized to the NTP server that is configured on the R10 router. What is the issue? 

A. The access list NTP_Clients is missing. 

B. The access group is misconfigured. 

C. The maximum number of peers and client associations is exceeded. 

D. The authentication key is mismatched. 

E. The PE2 router should be configured as an NTP peer instead of as a client. 

Answer: C 


Q89. Which are the three benefits of using the Yang model? (Choose three.) 

A. Reduce lab footprint 

B. Improve access to resources 

C. Support interoperability that provides a standard way to model management data 

D. Support simplified network management applications 

E. Provide a scale virtual lab environment 

F. Support programmatic interfaces 

Answer: C,D,F 

Explanation: https://tools.ietf.org/html/rfc6020#page-11 


Q90. Refer to the exhibit. 

Which VLAN interface does untagged traffic pass through? 

A. 1 

B. 2 

C. 3 

D. 4 

Answer: C