642-885 무료 덤프문제 온라인 액세스

DRAG DROP

정답:

Which two statements correctly describe the RPF check when a multicast packet arrives at a router? (Choose two.)

• A.If the packet has arrived on the interface leading back to the source, the RPF check passes and the packet is forwarded. If the RPF check fails, the packet is dropped
• B.The router looks up the destination address in the unicast routing table to determine if the packet has arrived on the interface that is on the reverse path back to the destination
• C.The router looks up the source address in the unicast routing table to determine if the packet has arrived on the interface that is on the reverse path back to the source
• D.If the packet has arrived on the interface leading back to the destination, the RPF check passes and the packet is forwarded. If the RPF check fails, the packet is dropped

A network engineer must configure a Cisco IOS XR router with BGP dampening. Which configuration meets these parameters?

• A.router bgp 60 address-family ipv4 unicast bgp dampening
• B.router bgp 60 neighbor 10.0.0.2 bgp dampening
• C.router bgp 60 bgp dampening
• D.route-policy dampening_specific drop ! router bgp 60 address-family ipv4 unicast bgp dampening route-policy dampening_specific
• E.router bgp 60 address-family ipv4 bgp dampening

Refer to the exhibit.

Based on the output of two eBGP adjacent neighbors, which command can be used to set up the default BGP timers?

• A.RP/0/0/CPU0:R1(config-bgp)#timers bgp 60 30
• B.RP/0/0/CPU0:R1(config-bgp)#timers bgp 60 180
• C.RP/0/0/CPU0:R2(config-bgp)#timers bgp 60 180
• D.RP/0/0/CPU0:R2(config-bgp-nbr)#timers bgp 180 60
• E.RP/0/0/CPU0:R2(config-bgp)#timers bgp 30 60

Which configuration would an engineer use to exchange IPv6 multicast routes via BGP with a neighbor that does not support thecorresponding Multicast SAFI onCisco IOS XE?

• A.router bgp 100 bgp router-id 209.165.201.10 no bgp default ipv4-unicast neighbor 2001:DB8::10 remote-as 201 neighbor 2001:DB8::10 update-source GigabitEthernet 0/10 address-family ipv6 neighbor 2001:DB8::10 translate-update ipv6 multicast unicast no synchronization exit address-family address-family ipv6 multicast neighbor 2001:DB8::10 activate network 2001:DB8:CDCD:1::/64 exit-address-family
• B.router bgp 100 bgp router-id 209.165.201.10 no bgp default ipv4-unicast neighbor 2001:DB8::10 remote-as 201 neighbor 2001:DB8::10 update-source GigabitEthernet 0/10 address-family ipv6 neighbor 2001:DB8::10 send-label neighbor 2001:DB8::10 override-capability-neg neighbor 2001:DB8::10 activate no synchronization exit address-family address-family ipv6 multicast network 2001:DB8:CDCD:1::/64 exit-address-family
• C.router bgp 100 bgp router-id 209.165.201.10 no bgp default ipv4-unicast neighbor 2001:DB8::10 remote-as 201 neighbor 2001:DB8::10 update-source GigabitEthernet 0/10 address-family ipv6 multicast neighbor 2001:DB8::10 activate network 2001:DB8:CDCD:1::/64 exit-address-family
• D.router bgp 100 bgp router-id 209.165.201.10 no bgp default ipv4-unicast neighbor 2001:DB8::10 remote-as 201 neighbor 2001:DB8::10 update-source GigabitEthernet 0/10 address-family ipv6 neighbor 2001:DB8::10 translate-update ipv6 multicast unicast neighbor 2001:DB8::10 activate no synchronization exit address-family address-family ipv6 multicast neighbor 2001:DB8::10 activate network 2001:DB8:CDCD:1::/64 exit-address-family
• E.router bgp 100 bgp router-id 209.165.201.10 no bgp default ipv4-unicast neighbor 2001:DB8::10 remote-as 201 neighbor 2001:DB8::10 update-source GigabitEthernet 0/10 address-family ipv6 neighbor 2001:DB8::10 activate address-family ipv6 multicast neighbor 2001:DB8::10 activate network 2001:DB8:CDCD:1::/64 exit-address-family