May 2016 updated: 642-887 pdf


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642-887 Product Description:
Exam Number/Code: 642-887 vce
Exam name: Implementing Cisco Service Provider Next-Generation Core Network Services (SPCORE)
n questions with full explanations
Certification: Cisco Certification
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Exam Code: 642-887 (Practice Exam Latest Test Questions VCE PDF)
Exam Name: Implementing Cisco Service Provider Next-Generation Core Network Services (SPCORE)
Certification Provider: Cisco
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2016 May 642-887 Study Guide Questions:

Q21. The Cisco IOS and IOS XE qos pre-classify command allows which kind of packet classification on IP packets that are encapsulated with GRE and IPsec?

A. allows for packets to be classified based on the ToS byte values before packet encryption

B. allows for packets to be classified based on the ToS byte values after packet encryption

C. allows for packets to be classified based on the packet payload before packet encryption

D. allows for packets to be classified based on the packet payload after packet encryption

E. allows for packets to be classified based on the packet header parameters other than the ToS byte values after packet encryption

Answer: A


Q22. Which Cisco IOS XR high-availability feature is used to prevent routes from being used before LDP converges?

A. LDP session protection

B. LDP-IGP synchronization

C. BFD

D. IGP session protection

Answer: B


Q23. A DSCP value of 41 in decimal corresponds to which IP precedence value?

A. 3 – Flash

B. 4 – Flash Override

C. 5 – Critical

D. 6 – Internet Control

E. 7 – Network Control

Answer: C


642-887  test questions

Replace 642-887 study guide:

Q24. When troubleshooting LDP operations on the Cisco IOS and IOS XE routers, what is one of the first things that should be verified?

A. if running OSPF as the IGP, ensure that OSPFv3 has been enabled

B. check if the ip cef command has been enabled

C. verify in the running configurations that all of the required LDP interfaces are defined under the mpls ldp command configuration mode

D. verify if there are any access lists that are denying TCP and UDP port 464 packets

Answer: B


Q25. Which two features are used to provide Cisco MPLS TE node and link protection? (Choose two.)

A. autoroute

B. fast reroute

C. backup tunnels

D. BFD

Answer: BC


Q26. Which three statements are correct regarding a Cisco MPLS TE? (Choose three.)

A. A Cisco MPLS TE tunnel maps onto an LSP path.

B. Tunnels are bidrectional by default.

C. Packets that are mapped into a Cisco MPLS TE tunnel will have two labels, with the top label indicating what the tail-end router should do with the packet.

D. A tunnel that is created with a priority of 0 can pre-empt an existing tunnel with a priority of 7.

E. CBR takes into account link resource and traffic tunnel attributes.

F. RSVP is used between customer routers.

Answer: ADE


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Precise cisco 642-887 book:

Q27. In Cisco MPLS TE implementations, what can cause the tunnel bandwidth to adjust automatically based on the traffic load in the tunnel?

A. fast reroute

B. admin weight

C. autobandwidth

D. bandwidth subpool

Answer: C


Q28. On a Cisco IOS XR router, which mechanism protects the router resources by filtering and policing the packets flows that are destined to the router that is based on defined flow-type rates?

A. LLQ

B. LPTS

C. Committed Access Rate

D. Control Plane Policing

E. Management Plane Protection

F. NetFlow

G. ACL

Answer: B


Q29. Cisco MPLS TE resource attributes that are configured locally for each link are distributed to the headend router of the traffic engineering tunnel using which protocol?

A. BGP

B. MP-BGP

C. LDP

D. RSVP

E. OSPF or IS-IS with TE extension

Answer: E


Q30. Which two of the following statements are correct regarding LSPs? (Choose two.)

A. An LSP is created for every routing protocol entry.

B. Each LSP is bidirectional, that is, packets traveling in the opposite direction use the same LSP.

C. An IGP is used to populate routing tables in all routers in an MPLS domain.

D. LDP is used to propagate labels and build LSPs.

E. The FIB is used to forward MPLS-labeled packets down an LSP.

Answer: CD



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