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Q1. With IPv6 multicast, which feature can be used as a replacement method for static RP configuration? 

A. PIM Snooping 


C. MLD Snooping 

D. Embedded RP 

E. DHCPv6 


Q2. 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 

Q3. In Cisco IOS-XR, the ttl-security command is configured under which configuration mode? 

A. RP/0/RSP0/CPU0:P2(config)# 

B. RP/0/RSP0/CPU0:P2(config-bgp)# 

C. RP/0/RSP0/CPU0:P2(config-bgp-nbr)# 

D. RP/0/RSP0/CPU0:P2(config-bgp-af)# 

E. RP/0/RSP0/CPU0:P2(config-bgp-nbr-af)# 


Q4. Which three statements regarding NAT64 operations are correct? (Choose three.) 

A. With stateful NAT64, many IPv6 address can be translated into one IPv4 address, thus IPv4 address conservation is achieved 

B. Stateful NAT64 requires the use of static translation slots so IPv6 hosts and initiate connections to IPv4 hosts. 

C. With stateless NAT64, the source and destination IPv4 addresses are embedded in the IPv6 addresses 

D. NAT64 works in conjunction with DNS64 

E. Both the stateful and stateless NAT64 methods will conserve IPv4 address usage 

Answer: A,C,D 

Q5. 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 


Q6. Which of the following can be used by dual-stack service providers supporting IPv4/IPv6 customers with dual-stack hosts using public IPv6 addresses and private IPv4 addresses? 

A. NAT64 

B. 6RD 

C. 6to4 tunnels 

D. Carrier-grade NAT 


Q7. Which type of BGP session behaves like an EBGP session during session establishment but behaves like an IBGP session when propagating routing updates where the local preference, multi-exit discriminator, and next-hop attributes are not changed? 

A. BGP sessions between a route reflector and its clients 

B. BGP sessions between a route reflector and its non-client IBGP peers 

C. BGP sessions between a route reflector and another route reflector 

D. Intra-confederation IBGP sessions 

E. Intra-confederation EBGP sessions 


Q8. Refer to the Cisco IOS DHCPv6 configuration shown in the exhibit. 

Which statement is correct? 

A. The configuration is missing a command under interface Gi0/1 to indicate to the attached hosts to use stateful DHCPv6 to obtain their IPv6 addresses 

B. The IPv6 router advertisements indicate to the attached hosts on the Gi0/1 interface to get other information besides their IPv6 address via stateless auto configuration 

C. The IPv6 DHCPv6 server pool configuration is misconfigured 

D. The DNS server address can also be imported from another upstream DHCPv6 server 




The amount of time for the penalty to decrease to one-half of its current value - 60 Suppress a route when its penalty exceeds this value - 2400 If a flapping route penalty decreases and falls below this value , the route is unsuppressed - 600 The maximum time a route can be suppressed - 240 

Q10. Refer to the Cisco IOS-XR configuration exhibit. 

The Cisco IOS-XR router is unable to establish any PIM neighbor relationships. What is wrong with the configuration? 

A. The configuration is missing: interface gi0/0/0/0 

ip pim sparse-mode interface gi0/0/0/1 ip pim sparse-mode interface loopback0 ip pim sparse-mode 

B. The configuration is missing: 

multicast-routing address-family ipv4 interface gi0/0/0/0 enable interface gi0/0/0/1 enable 

C. The auto-rp scoping configurations should be set to 1 not 16 

D. The RP address has not been configured using the rp-address router PIM configuration command 

E. PIM defaults to dense mode operations only, so PIM sparse mode must be enabled using the pim sparse-mode router PIM configuration command