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2021 Mar 400-201 real exam

Q71. Cisco IOS XR has implemented a nonstop routing feature so that when RP failover occurs, the routing information can be recovered locally. Which protocol does not support the NSR feature? 

A. OSPF 

B. LDP 

C. BGP 

D. IS-IS 

E. RSVP 

Answer:


Q72. Refer to the exhibit. 

Customer ABC is peering with two service providers for Internet Access In order to prevent the AS100 from becoming a transit AS between ISP_1 and ISP_2 Which BGP configuration must be applied to achieve this goal? 

A. CE1# 

ip as-path access-list 1 permit ^$ 

route-map LOCAL_ONLY permit 10 

match as-path 1 

router bgp 100 

neighbor 1.1.2.2 route-map LOCAL_ONLY in 

CE2# 

ip as-path access-list 1 permit ^$ 

route-map LOCAL_ONLY permit 10 

match as-path 1 

router bgp 100 

neighbor 1.1.1.2 route-map LOCAL-ONLY in 

B. CE1# 

ip as-path access-list 1 permit ^11$ 

route-map LOCAL_ONLY permit 10 

match as-path 1 

, router bgp 100 

neighbor 1.1.1.2 route-map LOCAL_ONLY out 

CE2# 

ip as-path acctss-list 1 permit ^22$ 

router-map LOCAL.ONLY permit 10 

match as-path 1 

router bgp 100 

neighbor 1.1.1.2 routt-map LOCAL_ONLY out 

C. CE1# 

ip as-path access-list 1 permit ^$ 

route-map LOCAL_ONLY permit 10 

match as-path 1 

router bgp 100 

neighbor 1.1.2.2 route-map LOCAL_ONLY out 

CE2# 

ip as-path access-list 1 permit ^$ 

route-map LOCAL_ONLY permit 10 

match as-path 1 

router bgp 100 

neighbor 1.1.1.2 route-map LOCAL_ONLY out 

D. CE1# 

ip as-path access-list 1 permit ^100$ 

route-map LOCAL_ONLY permit 10 

match as-path 1 

router bgp 100 

neighbor 1.1.2.2 route-map LOCAL_ONLY out 

CE2# 

ip as-path access-list 1 permit ^100S 

route-map LOCAL_ONLY permit 10 

match as-path 1 

router bgp 100 

neighbor 1.1.1.2 route-map LOCALJDNLY out 

Answer:


Q73. MPLS Service Providers use Route Distinguishers and Route Targets as methods to control routing for customer VRFs. Which two statements are true about Route Distinguishers and Route Targets? (Choose two.) 

A. Route Targets are values that are used by a PE router to uniquely identify a VRF within its local MP-BGP VPNv4 table. 

B. Route Distinguishers are used by PE routers by exporting and importing routes into a local VRF. 

C. Route Targets are used by PE routers to define how to import and export prefixes into a local VRF database. 

D. Route Targets are extended communities that are used by MP-BGP to identify routes as they are advertised to neighbor PE routers. 

E. Route Distinguishers are values that are used by a PE router to uniquely identify a VRF within its local MP-BGP VPNv4 table. 

Answer: C,E 


Q74. What is the PPMP label used for? 

A. for the ingress replication model with BIDIR-PIM in an overlay model 

B. only for the inter-AS mVPN models that use mLDP 

C. for the partitioned mVPN model with PIM signaling in an overlay model 

D. only for unicast over MPLS VPN 

E. for all the default MDT and mVPN models 

Answer:

Explanation: http://lostintransit.se/tag/bgp/ 

https://tools.ietf.org/html/draft-rosen-l3vpn-mvpn-mspmsi-08#section-3.2.2.1 


Q75. Refer to the exhibit. 

All routers have OSPF adjacency with the directly connected routers, yet RC cannot receive OSPF updates from Area 0 To fix this issue, which configuration should be applied? 

A. On RD router 

router ospf 1 

area 1 virtual-link 3.3.3.3 

On RB router: 

router ospf 1 

area 1 virtual-link 4.4.4.4 

B. On RC router. 

router ospf 1 

area 2 virtual-link 3.3.3.3 

On RB router: 

router ospf 1 

area 2 virtual-link 2.2.2.2 

C. On RC router 

router ospf 1 

area 0 virtual-link 1.1.1.1 

On RA router: 

router ospf 1 

area 2 virtual-link 2.2.2.2 

D. On RD router: 

router ospf 1. 

area 1 virtual-link 1.1.1.1 

On RA router: 

router ospf 1 areal virtual-link 4.4.4.4 

Answer:


Renewal 400-201 practice exam:

Q76. An operations engineer wants to manually optimize the MPLS Traffic Engineering tunnels. Which Cisco IOS EXEC command should the engineer apply? 

A. tunnel mpls traffic-eng autoroute destination 

B. tunnel mpls traffic-eng path-option lowest _number dynamic 

C. mpls traffic-eng reoptimize lockdown 

D. mpls traffic-eng multicast-intact 

E. mpls traffic-eng reoptimize 

Answer:


Q77. SSO was configured on a Cisco ASR 1006 Router by using two RPs. When the main RP failed, a service disruption occurred. What are two reasons that the SSO did not work? (Choose two.) 

A. The standby RP has a different DRAM configuration than the primary RP. 

B. HSRP and NSF are not configured. 

C. The ESP that is installed in the Cisco ASR 1006 Router does not support SSO. 

D. The standby RP was not ready to switch over when the primary RP failed. 

E. The standby RP has a different IOS version than the primary RP. 

Answer: B,E 

Explanation: 

http://www.cisco.com/c/en/us/td/docs/routers/asr1000/configuration/guide/chassis/asrswcfg /High_Availability.html 


Q78. Two Service Providers are beginning a merger between AS boundaries to provide MPLS-enabled services between their networks. Customers are using both Service Providers for services and, under certain circumstances; there are requirements to extend Layer 2 VPN circuits between each provider. The providers are in the process of completing the technical merger. However, the MPLS is not supported between the providers. Which action allows MPLS Layer 2 VPN circuits to be built over the inter-AS link? 

A. Create a GRE tunnel with the mpls ip command between ASBRs. 

B. Create Layer 2 VPN peerings between PE routers from each provider. 

C. Create a VPNv4 peering between ASBRs to advertise labels between each provider. 

D. Create a sham link between ASBR routers to enable a superbackbone peering for Layer 2 VPN signaling. 

Answer:

Explanation: https://ccdewiki.wordpress.com/2013/07/02/inter-as-l2vpn-mpls-solutions/ 


Q79. Refer to the exhibit. A customer is running IS-IS within a network and is using BGP as a CE-PE routing protocol. Which action allows CE1 to get the subnet 10.10.2.0/24 over the CE1-PE1 link, regardless of whether there is a flap in the MPLS link or backdoor link? 

A. Configure the neighbor <PE1-IP>weight 33768 command on CE1 under the BGP process. 

B. Configure the distance bgp 115 200 200 command on CE1 under the BGP process. 

C. Configure the distance 30 ip command on CE1 under the IS-IS process. 

D. Configure the distance bgp 115 200 200 command on CE2 under the BGP process. 

E. Configure the neighbor <PE1-IP>weight 33768 command on CE2 under the BGP process. 

Answer:


Q80. Refer to the exhibit. An MPLS Layer 3 VPN service has been provisioned for a customer. What will be the ToS value at Site-B for the exceeded traffic that it is sent from Site-A with ToS 2? 

A. 0 

B. 2 

C. 3 

D. 4 

E. No exceeded traffic will reach Site-B. 

Answer: