A Layer 3 VPN customer opened a case that reports connectivity loss with remote sites. An operations engineer realized this connectivity loss happened after the LDP label filtering was applied. What is the root cause of this issue?
A. Labels were not allocated for the PE , P and RR physical interfaces
B. Labels were not allocated for the PE loopbacks
C. Labels were not allocated for the CE loopback and physical interfaces
D. Labels were not allocated for the P loopbacks
E. Labels were not allocated for the PE, P , and RR loopbacks
F. Labels were not allocated for the P and PE physical interfaces
Correct Answer: B
Which version of IGMP is required for source specific multicast implementations?
A. IGMP version 2
B. Cisco group management protocol
C. IGMP version 3
D. IGMP version 1
Correct Answer: C
Which three security mechanisms are used to mitigate or protect against DoS attacks that are targeted at a router? (Choose three)
Correct Answer: BCF
In a L2VPN service, customer CE sends frames to PE1 using a CoS making value of 3. However , the remote CE receives those frames from PE2 with a CoS marking value of 0.
Which description of this behavior is true?
A. Egress PE2 is not configured with an outbound policy-map facing CE2 to preserve CoS marking
B. Egress PE2 is marking EXP 0 upon label imposition
C. Egress PE2 is not configured with mpls Ldp explicit-null command
D. Ingress PE1 is remarking the CoS frame received from CE1 with valuye of 0
Correct Answer: D