Cisco 642-887 Actual Free Exam Questions & Community Discussion

Exam Code/Number: 642-887
Exam Name/Title: Implementing Cisco Service Provider Next-Generation Core Network Services
Certification Provider: Cisco
Corresponding Certification: CCNP Service Provider

Exam Questions: 231
Updated On: May 27, 2026

Question #25

Which two network devices are trusted endpoints in a network? (Choose two.)

A. wireless clients

B. IP phone

C. video endpoint

D. PC

Discussion 0

Correct Answer: B,C Vote an answer

Question #26

Refer to the exhibit.

Which result occurs from this configuration?

A. If the explicit path becomes unavailable, the tunnel fails

B. If the explicit path becomes unavailable, the tunnel falls back to dynamic routing paths

C. The tunnel comes up because of the explicit path configuration and disregards all CSPF calculations

D. The traffic through the tunnel is limited to 65,000 Kbps of bandwidth

Discussion 0

Correct Answer: B Vote an answer

Question #27

Which method of assigning Cisco MPLS TE tunnel traffic can optimize voice service?

A. PBTS

B. CBTS

C. autoroute

D. static routing

Discussion 0

Correct Answer: A Vote an answer

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Question #28

What is a crucial LDP default operating behavior?

A. LDP uses UDP-confirmed messages to establish sessions between PE ingress and egress routers. The UDP messages encode the label information for each LSP and sub-LSP link

B. LDP establishes a TCP session between the PE routers, thus providing label mapping for the LSP

C. LDP uses the solicited mode by default. An LDP label request is sent to the FIB next hop LSR. When the egress router receives the request, it returns message with all the label-mapping information for the LSP is generated.

D. LDP uses downstream unsolicited mode by default. An LSR advertises label mappings to peers without being asked

Discussion 0

Correct Answer: D Vote an answer

Question #29

Which three options are class maps able to match? (Choose three.)

A. match destination-port

B. match protocol http url "*cisco"

C. match access-group

D. match mac-address

E. match all

F. match DSCP

Discussion 0

Correct Answer: B,C,F Vote an answer

Question #30

Which two factors must you consider when configuring MPLS EXP? (Choose two.)

A. MPLS EXP classification for bridged MPLS packets on EVCs is supported

B. MPLS EXP marking is supported in the egress direction

C. MPLS EXP marking is supported in the ingress direction

D. A packet that IP ToS classifies at ingress can be reclassified by MPLS EXP at egress

E. A packet that MPLS classifies at ingress can be reclassified by IP ToS at egress

Discussion 0

Correct Answer: C,E Vote an answer

Question #31

Which statement defines how MPLS LDT Graceful Restart works after a service interruption?

A. It works by helping neighboring routers with MPLS LDP SSO/NSF and Graceful Restart to recover MPLS forwarding information

B. It works independent of neighboring routers to recover MPLS forwarding information

C. It works independent of neighboring non-LDP Graceful Restart routers to recover MPLS forwarding information

D. It works by helping all neighboring MPLS LDP routers to recover MPLS forwarding information

Discussion 0

Correct Answer: A Vote an answer

Question #32

Which option is the appropriate method for CBWFQ WRED implementation in Cisco IOS XR?

A. configure
policy-map POLICY_1
class CLASS1
wred default
commit

B. configure
interface pos 0/0/0/0
random-detect default
commit

C. configure
policy-map POLICY_1
class CLASS1
weighted random-detect default
commit

D. configure
policy-map POLICY_1
class CLASS1
random-detect default
commit

Discussion 0

Correct Answer: D Vote an answer

Question #33

An LDP session is established between two neighbors. Over which protocol and port number do they maintain their adjacency?

A. UDP 646

B. TCP 646

C. UDP 711

D. TCP 711

Discussion 0

Correct Answer: B Vote an answer

Question #34

Which option shows how a network engineer implements QPPB marking of incoming traffic on a router that is connected to a VoIP SP (AS62000, BGP community 60000:1) and to a data services service provider (AS61000, BGP community 61000:1) on Cisco IOS XE?
A)