Shortcuts To 400-201(21 to 30)

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Q21. A network engineer is designing the BGP architecture with a requirement of preventing the AS 65001 from becoming a Transit AS path, using the following configuration: 

router bgp 65000 

neighbor 10.0.0.1 route-map BGP-ROUTE-POLICY in 

The goal is to prevent routes learned from 10.0.0.1 from being advertised to any other eBGP peering in the AS 65000. What command should be used within the route map to achieve this goal while keeping existing route policies in place? 

A. set community no-export additive 

B. set community no-advertise 

C. set community no-advertise additive 

D. set community no-export 

Answer:

Explanation: 

Reference: http://www.cisco.com/c/en/us/support/docs/ip/border-gateway-protocol-bgp/26634-bgp-toc.html 


Q22. Which are the three header fields that affect how Equal-Cost Multipath hashes traffic flow into interface groups? (Choose three.) 

A. source MAC address 

B. source port 

C. source IP address 

D. destination IP address 

E. IP protocol ID 

F. destination MAC address 

Answer: B,C,D 

Explanation: https://supportforums.cisco.com/document/111291/asr9000xr-loadbalancing-architecture-and-characteristics#field 


Q23. Which BGP feature improves the convergence and response time to adjacency changes with BGP neighbors? 

A. Fast Peering Session Deactivation 

B. BGP Multihop 

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

D. TTL Security Check 

E. Next-Hop Address Tracking 

Answer:


Q24. DRAG DROP 

Drag and drop the IPFIX terminology on the left to the correct description on the right. Not all options will be used. 

Answer: 


Q25. Refer to the exhibit. 

A service provider has multiple time sources in the environment for NTP. The time source at 10.0.4.1 is intended to be seen as a primary time source. What command can be issued on PE4 to fix the configuration, ensuring the proper NTP source will be issued? 

A. ntp peer 10.0.4.1 

B. ntp peer 10.0.4.1 prefer 

C. ntp server 10.0.4.1 source GigabitEthernet0/0 

D. ntp server 10.0.4.1 prefer 

Answer:

Explanation: http://www.cisco.com/c/en/us/td/docs/switches/datacenter/sw/5_x/nx-os/system_management/configuration/guide/sm_nx_os_cg/sm_3ntp.html#wp1106725 


Q26. 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 


Q27. Refer to the exhibit. 

Which piece of information can be derived from this Cisco IOS XR route policy? 

A. If the destination is 227.0 0 3 or 227 0 0 13 the default table will be used for reverse path forwarding 

B. If the destination ranges between 227.0 0.3 and 227 0.0.13. the IPv4 unicast table will be used for reverse path forwarding 

C. If the destination is 227.0.0.3 or 227.0 0.13, the IPv4 unicast table will be used for reverse path forwarding 

D. If the destination ranges between 227.0.0.3 and 227.0.0.13. the multicast default table will be used for reverse path forwarding 

Answer:


Q28. In an end-to-end Layer 2 service, which technology provides the capability to detect, verify, isolate, and report faults across a provider network? 

A. carrier detect 

B. UDLD 

C. BFD 

D. CFM 

Answer:


Q29. In a routing virtualization concept, which are the two main techniques for creating vitalized router entities as defined by their physical and operational characteristics? (Choose two.) 

A. HVR 

B. SVR 

C. SDR 

D. DRP 

E. VDC 

Answer: A,B 


Q30. Due to recent acquisitions, a company's MPLS infrastructure is growing very quickly. Concerns arise about labeling each and every IP address on the service provider core network. The IP address space is designed as per following: 

. Service provide ip address range is: 10.0.0.0/16 

. All loopback addresses use subnet mask /32 

. 10.0.0.0/24 range is used for loopback addresses 

. All other subnet masks used for links are /24 and /25 

Which command would significantly reduce the label allocations without compromising LDP functionalities? 

A. ip prefix-list Llst1 deny 10.0.0./16 le 20 ge 25 

mpls Idp label 

allocate global prefix-list List1 

B. access-list 1 permit 10.0.0.0 0.0.255.255 

mpls Idp neighbor 10.0.0.1 labels accept 3 

C. mpls Idp label 

allocate global host-routes 

D. mpls Idp password required for 10 

access-list 10 permit 10.0.0.1 

access-list 10 permit 10.0.0.2 

access-list 10 permit 10.0.0.3 

Answer: