Cisco 642-887 - Implementing Cisco Service Provider Next-Generation Core Network Services Exam
Page: 2 / 26
Total 130 questions
Question #6 (Topic: )
DS-TE implementations on Cisco routers support which bandwidth pool(s) and class
type(s)? (Choose two.)
type(s)? (Choose two.)
A. global pool only
B. subpool only
C. global pool and subpool
D. class-type 0 only
E. class-type 1 only
F. class-type 0 and class-type 1
Answer: C,F
Question #7 (Topic: )
Which four options are methods by which labels can be assigned in the label stack to an IP
prefix? (Choose four.)
prefix? (Choose four.)
A. LDP
B. CEF
C. BGP
D. RSVP
E. static
F. IGP
G. route recursion
H. manual tagging
Answer: A,C,D,G
Question #8 (Topic: )
Which field in the MPLS shim header is used to support different QoS markings?
A. IP precedence
B. DSCP
C. EXP
D. ToS
E. S
F. Label
Answer: C
Question #9 (Topic: )
You are tasked to enable LDP on many of the interfaces on the Cisco CRS-3 router, and
because there are many interfaces that need to have LDP enabled, you mistakenly did not
enable LDP on all the required interfaces. To prevent this issue from happening again in
the future, what could you do the next time you need to enable LDP on many interfaces?
because there are many interfaces that need to have LDP enabled, you mistakenly did not
enable LDP on all the required interfaces. To prevent this issue from happening again in
the future, what could you do the next time you need to enable LDP on many interfaces?
A. use the mpls ldp auto-config command under the IGP routing process
B. use the mpls ldp sync command under the IGP routing process
C. use the interface all command under the MPLS LDP process
D. use the discovery command under the MPLS LDP process
Answer: A
Question #10 (Topic: )
Which option describes what happens when a labelled packet with a TTL of 1 is received
by an LSR?
by an LSR?
A. The packet is forwarded on to the next router where its TTL expires and from where an ICMP "time exceeded" message is generated and routed back to the source.
B. The packet is dropped and an ICMP "time exceeded" message is IP routed back to the sender.
C. The packet is dropped and an ICMP "time exceeded" message is label-switched from the expiring router back on a new path toward the source.
D. The packet is dropped and an ICMP "time exceeded" message is label-switched from the expiring router on the same label switched path toward the destination and then back to the originating source.
E. The packet is forwarded on to the next router where its TTL expires and from where an ICMP "time exceeded" message is generated and label switched back to the source.
Answer: D
