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Exam Number/Code: 642-887
Exam name: Implementing Cisco Service Provider Next-Generation Core Network Services (SPCORE)
n questions with full explanations
Certification: Cisco Certification
Last updated on Global synchronizing
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2016 May 642-887 Study Guide Questions:
Q1. Which statement is correct regarding the default MPLS TTL behavior?
A. When an ingress edge LSR receives an IP packet, it will decrement the IP TTL field by
1; then it will set the MPLS Label TTL field to 255.
B. When an ingress edge LSR receives an IP packet, it will decrement the IP TTL field by 1; then it will copy the decremented IP TTL field into the MPLS Label TTL field.
C. When an ingress edge LSR receives an IP packet, it will just copy the IP TTL field into the MPLS Label TTL field.
D. When an ingress edge LSR receives an IP packet, it will copy the IP TTL field into the MPLS Label TTL field first; then it will only decrement the MPLS Label TTL field by 1.
E. When an ingress edge LSR receives an IP packet, it will copy the IP TTL field into the MPLS Label TTL field first; then it will only decrement the IP TTL field by 1.
Q2. 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
Q3. 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
Latest testking 642-887:
Q4. Referring to the show output exhibit, which statement is correct?
A. The P1 router is receiving label information for the 10.0.2.1/32 prefix from two LDP peers.
B. The P1 router is receiving label information for the 10.7.1.1/32 prefix from two LDP peers.
C. The P1 router is using the IMP-NULL local label for the 10.7.1.1/32 prefix because 10.7.1.1/32 is the loopback interface IP address on the P1 router.
D. The P1 router will perform PHP for the 10.7.1.1/32 and 10.7.10.1./32 prefixes.
Q5. 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
D. bandwidth subpool
Q6. Refer to the Cisco IOS XR configuration exhibit.
Which statement is correct?
A. The backup tunnel-te 10 tunnel is using the highest setup and hold priority settings of 7.
B. The backup tunnel path is learned dynamically.
C. The fast-reroute command is missing under the (config-mpls-te-if)# configuration mode.
D. Interface gi0/0/0/10 is the protected link.
100% Guarantee 642-887 lab:
Q7. When configuring LLQ (strict priority queue) on a traffic class using the Cisco IOS XR priority command on a Cisco ASR9K router, which additional QoS command is required for this traffic class?
Q8. What is an important requirement with MPLS applications like Layer 3 MPLS VPNs?
A. All the PE routers loopback addresses should be summarized to reduce the number of routing table entries in the core routers.
B. Targeted hellos are required between all the PE routers.
C. An end-to-end LSP is required between the PE routers.
D. The LSPs that are built between the PE routers must be symmetrical (bidirectional).
Q9. Which three mechanisms are used to implement MPLS TE? (Choose three.)
A. tunnel interface
Q10. Implementing IPoDWDM interfaces on Cisco CRS routers eliminates the need for which network component?
B. external transponders
C. electrical-optical-electrical converters
D. electrical cross-connect
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