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Exam Code:
642-887
Exam Name: Implementing Cisco Service Provider Next-Generation Core Network Services
One year free update, No help, Full refund!
642-887 Real Exams Total Q&A: 130 Questions and Answers
Last Update: 07-15,2015
Exam Name: Implementing Cisco Service Provider Next-Generation Core Network Services
One year free update, No help, Full refund!
642-887 Real Exams Total Q&A: 130 Questions and Answers
Last Update: 07-15,2015
642-887 Practice Exam Detail : 642-887 Real
Exams
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NO.1 Implementing IPoDWDM interfaces on Cisco CRS routers eliminates the need for which network
component?
A. ROADM
B. external transponders
C. electrical-optical-electrical converters
D. electrical cross-connect
Answer: B
Implementing Cisco Service Provider Next-Generation Core Network Services
Exam Number | 642-887 SPCORE |
---|---|
Associated Certifications | CCNP Service Provider |
Duration | 90 minutes (65 - 75 questions) |
Available Languages | English |
Register | Pearson VUE |
Exam Policies | Read current policies and requirements |
Exam Tutorial | Review type of exam
questions |
Explanation:
IP over DWDM (IPoDWDM) is a technology used in telecommunications networks to integrate IP
Routers and Switches in the OTN (Optical Transport Network).
NO.2 Which statement describes the QoS behavior between P and PE routers of an MPLS provider
network for an L3VPN service?
A. The PE function honors DSCP markings set by the CE.
B. The customer and provider must agree on DSCP classification and traffic priorities.
C. Classification of customer traffic is handled by the P router.
D. The PE function cannot map DSCP markings to MPLS EXP bits.
Answer: B
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NO.3 With unmanaged CE routers, at which point in the service provider network is the QoS trust
boundary, and what is required at the trust boundary?
A. between the CE and PE router and mapping of the customer traffic classes into the service
provider traffic classes at the PE router ingress
B. between the CE and PE router and trusting the QoS markings from the CE router and applying the
required QoS mechanisms based on the customer QoS markings
C. between the PE and the P router and mapping of the customer traffic classes into the service
provider traffic classes at the P router ingress
D. between the PE and P router and trusting the QoS markings from the CE router and applying the
required QoS mechanisms based on the customer QoS markings
E. between the customer network and the CE router ingress and applying the required egress QoS
policy on the CE router
Answer: A
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NO.4 Referring to the traceroute output exhibit that is shown,
which statement is correct?
A. There is no problem with the end-to-end LSP as indicated by the successful trace.
B. Normal PHP operation is performed by the hop 4 router.
C. The end-to-end LSP is broken at hop 4.
D. At each hop, each LSR is able to perform label swapping.
Answer: C
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NO.5 In which two Cisco IOS XR configuration modes can mpls ldp igp sync be configured? (Choose
two.)
A. config-ldp
B. config-if
C. config-ospf-ar
D. config-ospf
E. config-isis
Answer: C,D
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NO.6 A network operations center requests support to configure a Cisco MPLS TE tunnel on a Cisco
IOS XR router. Which command sets a specific bandwidth required to the corresponding Cisco MPLS
TE tunnel?
A. rsvp interface interface-path-id bandwidth bandwidth
B. interface tunnel-te tunnel_id ! bandwidth bandwidth
C. interface tunnel-te tunnel_id ! signaled-bandwidth bandwidth
D. mpls traffic-eng auto-bw collect frequency value !
Answer: C
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NO.7 Which option describes what happens when a labelled packet with a TTL of 1 is received 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
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NO.8 What is the term that is used for the label that an LSR assigns and distributes to other LSRs in
MPLS?
A. Local
B. Remote
C. Explicit
D. Explicit Null
E. Aggregate
Answer: A
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