Which configuration must the team implement on PE-XR1?

Refer to the exhibit.

The network team must implement MPLS LDP session protection with two requirements:

Session protection is provided for core loopback IP addresses only.

The LDP session must remain operational for one hour when the WAN link on PE-XR1 fails.

Which configuration must the team implement on PE-XR1?
A . configure terminal
ipv4 access-list LDP-SESSION-PROTECTION
permit ipv4 172.31.255.0 0.0.0.255 any
!
mpls ldp
session protection for LDP-SESSION-PROTECTION duration 60
end
B. configure terminal
ipv4 access-list LDP-SESSION-PROTECTION
permit ipv4 172.31.255.0 0.0.0.255 any
!
mpls ldp
session protection for LDP-SESSION-PROTECTION duration 3600
end
C. configure terminal
ipv4 access-list LDP-SESSION-PROTECTION
permit ipv4 172.31.255.0 0.0.0.255 any
permit ipv4 10.0.0.0 0.0.255.255 any
!
mpls ldp
session protection for LDP-SESSION-PROTECTION duration 60
end
D. configure terminal
ipv4 access-list LDP-SESSION-PROTECTION
permit ipv4 172.31.255.0 0.0.0.255 any
permit ipv4 10.0.0.0 0.0.255.255 any
!
mpls ldp
session protection for LDP-SESSION-PROTECTION duration 3600
end

View Answer

Answer: D