The 642-887 SPCORE Implementing Cisco Service Provider Next-Generation Core Network Services exam. This exam tests a candidate's knowledge of the concepts and implementation of MPLS technology and MPLS-TE services. It also validates the understanding of technology principles of basic Quality of Service, and Quality of Service with Multi Protocol Label Switching (MPLS) to implement advanced features and functions. Candidates can prepare for this exam by taking the Implementing Cisco Service Provider Next-Generation Core Network Services (SPCORE) course.

NO.1 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

NO.2 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

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.3 Scenario:

On PE7 which statement is correct regarding the "traffic-policing" policy-map?

A. The "traffic-policing" QoS policy is applied to the Gi0/0/0/0 interface in the outbound direction.

B. The "traffic-policing" QoS policy will police the traffic matched by the "test12" ACL to 3 mbps and

will drop all exceeding traffic.

C. All incoming traffic not matched by the "test12" ACL to the Gi0/0/0/0 interface will be dropped.

D. The "traffic-policing" QoS policy is using dual rate class-based traffic policing.

Answer: B

Explanation:

#show running-config policy-map #show policy-map

NO.4 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

NO.5 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

NO.6 On Cisco routers, which QoS marker is only locally significant?

A. DSCP

B. MPLS EXP

C. IP precedence

D. QoS group

E. discard eligible (DE)

Answer: D

NO.7 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

NO.8 On Cisco routers, which three methods can be used to map traffic into the MPLS traffic

engineering tunnel? (Choose three.)

A. on-demand routing

B. static routing

C. optimized edge routing

D. policy-based routing

E. autoroute

Answer: B,D,E