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Q1. What must occur before an (S,G) entry can be populated in the multicast routing table? 

A. The (*,G) entry must have timed out 

B. The (*,G) entry OIL must be null 

C. The router must be directly connected to the multicast source 

D. The parent (*,G) entry must be created first 

Answer: D 

Q2. Refer to the topology diagram shown in the exhibit and the partial configurations shown below. 

Once the attack from 209.165.201.144/28 to 209.165.202.128/28 has been detected, which additional configurations are required on the P1 IOS-XR router to implement source-based remote-triggered black hole filtering? 

! router bgp 123 address-family ipv4 unicast redistribute static route-policy test 

A. router static address-family ipv4 unicast 209.165.202.128/28 null0 tag 666 192.0.2.1/32 null0 tag 667 ! route-policy test if tag is 666 then set next-hop 192.0.2.1 endif if tag is 667 then set community (no-export) endif end-policy ! 

B. router static address-family ipv4 unicast 209.165.201.144/28 null0 tag 666 192.0.2.1/32 null0 tag 667 ! route-policy test if tag is 666 then set next-hop 192.0.2.1 endif if tag is 667 then set community (no-export) endif end-policy ! 

C. router static address-family ipv4 unicast 209.165.201.144/28 null0 tag 666 192.0.2.1/32 null0 ! route-policy test if tag is 666 then set next-hop 192.0.2.1 set community (no-export) endif end-policy 

D. router static address-family ipv4 unicast 209.165.202.128/28 null0 tag 666 192.0.2.1/32 null0 ! 

route-policy test if tag is 666 then set next-hop 192.0.2.1 set community (no-export) endif end-policy ! 

Answer: C 

Q3. Refer to the exhibit. 

Which statement correctly explains the bgp graceful-restart command? 

A. This command is used to enable NSR and is entered on the NSR-capable router, and also on any NSR-aware peer 

B. This command is used to enable NSF and is entered on the NSF-capable router, and also on any NSF-aware peer 

C. This command is only required on the NSF-capable routers to enable BGP graceful restart with the BGP peers 

D. This command is only required on the NSF-aware routers to enable BGP graceful restart with the BGP peers 

E. This command is only required on the NSR-capable routers to enable BGP graceful restart with the BGP peers 

Answer: B 

Q4. Which three statements are correct regarding the various multicast groups? (Choose three.) 

A. Currently there is no source sending traffic to the 224.1.1.1 multicast group 

B. PE5 has a Null OILforthe (*,224.0.1.40) entry 

C. PE5 has a Null OILforthe (*,224.1.1.1) entry 

D. CE5 has joined the 224.0.1.40 multicast group 

E. CE5 has a Null OILforthe (*,224.1.1.1) entry 

Answer: C,D,E #show ip mroute 

Q5. Which two statements correctly describe the BGP ttl-security feature? (Choose two.) 

A. This feature protects the BGP processes from CPU utilization-based attacks from EBGP neighbors which can be multiple hops away 

B. This feature prevents IBGP sessions with non-directly connected IBGP neighbors 

C. This feature will cause the EBGP updates from the router to be sent using a TTL of 1 

D. This feature needs to be configured on each participating BGP router 

E. This feature is used together with the ebgp-multihop command 

Answer: A,D 

Q6. Which statement is correct regarding MP-BGP? 

A. MP-BGP can indicate whether an advertised prefix (NLRI) is to be used for unicast routing, multicast RPF checks or for both using different SAFIs. 

B. MP-BGP uses a single BGP table to maintain all the unicast prefixes for unicast forwarding and all the unicast prefixes for RPF checks. 

C. MP-BGP can be used to propagate multicast state information, which eliminates the need to use PIM for building the multicast distribution trees. 

D. MP-BGP enables BGP to carry IP multicast routes used by MSDP to build the multicast distribution trees. 

Answer: A 

Q7. Which types of multicast distribution tree can PIM-SM use? 

A. Only shared tree rooted at the source 

B. Only shared tree rooted at the RP 

C. Only shortest path tree rooted at the RP 

D. Shared tree rooted at the source and shortest path tree switchover 

E. Shared tree rooted at the RP and shortest path tree switchover F. Shared tree rooted at the first-hop router and shortest path tree rooted at the RP 

Answer: E 

Q8. On Cisco IOS-XR, which BGP process can be distributed into multiple instances? 

A. BGP process manager 

B. BGP RIB process 

C. BGP speaker process 

D. BGP scanner process 

E. BGP dampening process 

Answer: C 

Q9. Which multicast routing protocol is most optimal for supporting many-to-many multicast applications? 

A. PIM-SM 

B. PIM-BIDIR 

C. MP-BGP 

D. DVMRP 

E. MSDP 

Answer: B 

Q10. RAG DROP Answer: 

Manually configured tunnel - 6RD , GRE Automatic Tunnel - 6 to 4 , IPV6-in-IPV4 

Answer: