400-201 training tools(31 to 40) for IT professionals: Apr 2021 Edition


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Q31. Refer to the exhibit. 

R1 is using the RP that is learned via BSR R1 also has a static RP configuration in place. 

In order to prefer the static RP over BSR, which configuration should be applied on R1? 

A. ip pim bsr-candidate loopback 0 priority 200 

B. ip pim rp-address 172.1.224.3 priority 200 

C. ip pim bsr-candidate loopback 0 override 

D. ip pim rp-address 172.1.224.3 override 

Answer:


Q32. Which Cisco IOS XR Virtualization technology provides full isolation between virtualized routing instances for extra control plane resources? 

A. HVR 

B. SVR 

C. SDR 

D. DRP 

Answer:

Explanation: 

http://www.cisco.com/en/US/solutions/collateral/ns341/ns524/ns562/ns573/white_paper_c11-512753_ns573_Networking_Solutions_White_Paper.html 


Q33. 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:


Q34. In a secure domain router scenario, which two functions are shared amongst all SDR in the system? (Choose two.) 

A. configuration 

B. protocols 

C. routing tables 

D. chassis-control 

E. switch-fabric 

Answer: D,E 

Explanation: 

Secure domain routers (SDRs) provide a means of partitioning a router into multiple, independent routers. SDRs perform routing functions in the same manner as a physical router but share resources with the rest of the system. For example, the applications, configurations, protocols, and routing tables assigned to an SDR belong to that SDR only, but other functions such as chassis control, switch fabric, and partitioning are shared with the rest of the system. 

Reference: http://www.cisco.com/c/en/us/td/docs/routers/crs/software/crs_r4-3/system_management/command/reference/b_sysman_cr43crs/b_sysman_cr43crs_chapt er_01110.html 


Q35. Refer to the exhibit. 

IS-IS configuration has been deployed using the default IS-IS metric value and default IS-IS metric-style. The SP decides to implement MPLS TE in all routers, except R5. In order to maintain IS-IS adjacency between R3 and R5 without impacting reachability, which command should be configured on R3 router under the IS-IS process? 

A. metric-style narrow 

B. metric-style wide 

C. metric-style narrow transition 

D. metric-style transition 

Answer:


Q36. 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 


Q37. 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:


Q38. Which QoS DiffServ mode preserves the original customer IP marking besides of on egress PE router uses the DSCP value of this IP packet on outbound queuing? 

A. MPLS PHB mode 

B. Pipe mode 

C. IntServ mode 

D. Uniform mode 

E. Short-Pipe mode 

Answer:


Q39. Which two flexible service mapping features that are used on the ES40 line card can classify traffic into different service instances, in order to consume fewer VLANs? (Choose two.) 

A. CoS 

B. DSCP 

C. IP precedence 

D. MPLS experimental bit 

E. ToS 

F. EtherType 

Answer: A,F 

Explanation: 

Reference: http://www.cisco.com/c/en/us/td/docs/routers/7600/install_config/ES40_config_guide/es40_ sw_config/es40_chap7.html#pgfId-1500091 


Q40. A Service Provider is offering VoIP services and a service level agreement to customers. Which configuration provides validation to customers that the service level agreement has been honored? 

A. ip sla 999 udp-jitter 209.165.200.225 1000 codec g729a tos 160 ip sla schedule 999 life forever start-time now 

B. ip sla 999 icmp-jitter 209.165.200.225 tos 160 ip sla schedule 999 life forever start-time now 

C. ip sla 999 icmp-jitter 209.165.200.225 tag VoIP-SLA ip sla schedule 999 life forever start-time now 

D. ip sla 999 udp-jitter 209.165.200.225 1000 codec g729a tag VoIP-SLA 

ip sla schedule 999 life forever start-time now 

Answer: