Online Access Free 642-885 Practice Test

Refer to the Cisco IOS-XR show output exhibit.

Which two statements are correct? (Choose two.)

• A.This router is the RP for the 224.1.1.1 multicast group
• B.The RP for the 224.1.1.1 multicast group is reachable over the Gi0/0/0/0 interface
• C.Incoming 224.1.1.1 multicast group traffic will be sent out through the Gi0/0/0/0 interface
• D.The RPF neighbor 192.168.11.1 is the path towards the RP for the 224.1.1.1 multicast group
• E.Incoming 224.1.1.1 multicast group traffic will be sent out through the Gi0/0/0/2 interface

Which two functions are supported for BGP extension MP-BGP for IP multicasting? (Choose two.)

• A.MP-BGP is an enhanced BGP that carries routing information for multiple network layer protocols and IP multicast routes.
• B.A network can support congruent unicast and multicast topologies.
• C.MP-BGP is useful when a link dedicated to multicast and unicast traffic is desired.
• D.A network can support incongruent unicast and multicast topologies.
• E.MP-BGP carries single sets of routes for unicast routing and multicast routing.

Which three statements regarding the BGP operations are correct? (Choose three)

• A.CE5 is announcing the 192.168.55.0/24 prefix via EBGP to the PE5 EBGP peer
• B.CE5 has received 5 prefixes from the PE5 EBGP peer
• C.PE5 will set the local preference to 200 on all the prefixes learned from CE5
• D.The AS-Path to reach the 209.165.202.128/27 prefix from CE5 is: 64500 64497 64498
• E.CE5 has the BGP scan interval set to 30 seconds
• F.PE5 will set the local preferences 200 on all the prefixes sent to CE5

Refer to the exhibit.

XR4 must protect itself from a DOS attack against its BGP process from R1 by using the TTL security feature. Which configuration achieves this goal?

• A.router bgp 100 neighbor 10.10.14.1 ttl-security hops 255
• B.router bgp 100 neighbor 10.10.14.1 ttl-security hops 254
• C.router bgp 100 neighbor 10.10.14.1 ttl-security hops 1
• D.router bgp 100 neighbor 10.10.14.1 ttl-security

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

• A.Stateful NAT64 requires the use of static translation slots so IPv6 hosts and initiate connections to IPv4 hosts.
• B.With stateful NAT64, many IPv6 address can be translated into one IPv4 address, thus IPv4 address conservation is achieved
• C.NAT64 works in conjunction with DNS64
• D.Both the stateful and stateless NAT64 methods will conserve IPv4 address usage
• E.With stateless NAT64, the source and destination IPv4 addresses are embedded in the IPv6 addresses