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400-201 Exam Questions - Online Test


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Q1. Two routers that are running MPLS and LDP have multiple links that than connect them to each other. An engineer wants to ensure that the label bindings are not flushed from the LIB if one of the links fails. Which configuration meets this requirement? 

A. the mpls ldp neighbor targeted command 

B. the mpls ip command on a Cisco MPLS TE tunnel 

C. the mpls ldp discovery targeted-hello accept command 

D. the mpls ldp session protection command 

Answer:

Explanation: 

http://www.cisco.com/c/en/us/td/docs/ios/12_0s/feature/guide/fssespro.html#wp1027177 

http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/mp_ldp/configuration/xe-3s/asr1000/mp-ldp-xe-3s-asr1000-book/mp-ldp-sessn-prot.html#GUID-FA0EF183-FA7C-488A-85C1-82BFEB91DCA7 

Q2. Which are the two fundamental ways in which IEEE 1588 differs from SyncE? (Choose two.) 

A. In addition to frequency synchronization, it achieves ToD synchronization to achieve phase alignment which is required for multi-channel communication. 

B. It is a purely-based solution, with the actual clock values being passed inside the payloads of special packets dedicated to that task. 

C. It offers two major changes over traditional Ethernet to make it suitable for clock distribution: a mandated clock accuracy and the ESMC protocol for clock selection, distribution, management, traceability, and failover. 

D. SyncE is a Cisco proprietary ToD technology where IEEE 1588 is a industry standard recommended for interoperability across vendor devices. 

E. IEEE 1588 applies to voice-only systems or with low-bandwidth data traffic. 

Answer: A,B 

Explanation: http://www.eetimes.com/document.asp?doc_id=1278660 

Q3. Refer to the exhibit. 

A CE connected to a service provider has an agreement to use 512Mbps of bandwidth. Which QoS configuration must be modified to ensure that the traffic matches the agreed bandwidth? 

A. Apply the same CE QoS configuration on PE on inbound direction. 

B. Change the outbound direction of the service-policy to inbound for ingress traffic shaping. 

C. Treat the class-default as best-effort by removing the shape average 512000 command 

D. Replace the shape keyword with police keyword in both classes 

E. Reconfigure the policy-map as a nested policy with the shaping applied as a parent for all child policies 

Answer:

Q4. Refer to the exhibit: 

A customer with two sites is running RIP as a CE-PE routing protocol. These two sites are connected through Layer 3 VPN services. Each of these CE routers cannot ping the LAN IP address of the other router. Which action resolves this issue? 

A. On PE2 under RIP VRF ABC address family, add the redistribute bgp 100 metric 5 command. 

B. On PE1 under RIP VRF ABC address family, add the network 10.10.13.0 command. 

C. On both PEs under BGP VRF ABC address family, add the bgp bestpath igp-metric ignore command. 

D. On PE1 under RIP VRF ABC address family, add the no auto-summary command. 

E. On PE2 under BGP VRF ABC address family, add the bgp redistribute-internal command. 

Answer:

Q5. A MPP has been implemented in a Cisco IOS-XR device. Which are the two results that will occur? (Choose two.) 

A. If MPP is disabled and a protocol is activated, all interfaces cannot pass traffic 

B. MPP configuration changes doesn't affect active sessions established before the changes 

C. RP/DRP Ethernet Interfaces are not default out-of-band interfaces 

D. Management traffic to RP from all non-MPP interfaces is dropped 

E. Interfaces configured for out-of-band MPP are still part of global routing/forwarding 

Answer: B,D 

Q6. DRAG DROP 

Drag and drop the OAM protocol listed on the left to the correct standard on the right. Not all options will be used. 

Answer:  

Q7. Two Tier 2 Service Providers are using a Tier 1 Service Provider for transport. MPLS is required between the Tier 2 Service Providers for label switching. In this CSC solution, which label stack is correct? 

A. original IP packet, MPLS CSC transport label, MPLS VPN label, and MPLS Tier 2 transport label 

B. original IP packet, MPLS Tier 2 transport label, MPLS VPN label, and MPLS CSC transport label 

C. original IP packet, MPLS VPN label, MPLS Tier 2 transport label, and MPLS CSC transport label 

D. original IP packet, MPLS Tier 2 transport label, MPLS CSC transport label, and MPLS VPN label 

Answer:

Q8. 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:

Q9. A network engineer is responsible for implementing a solution with Cisco IOS XR Software that ensures continuous forwarding during a control plane failure. Which two technologies should the engineer consider? (Choose two.) 

A. IP FRR 

B. NSR 

C. graceful restart 

D. BFD 

E. TE FRR 

Answer: B,C 

Q10. A network engineer is responsible for implementing a solution with Cisco IOS XR Software that insures continuous forwarding during a control plane failure. Which two technologies should the engineer consider? (Choose two.) 

A. TE FRR 

B. IP FRR 

C. graceful restart 

D. BFD 

E. NSR 

Answer: C,E 

Explanation: http://www.cisco.com/c/en/us/td/docs/routers/crs/software/crs_r4-3/mpls/configuration/guide/b_mpls_cg43xcrs/b_mpls_cg43crs_chapter_01.html#task_1129