Free 642-691 download :cisco CCIP CCIP BGP + MPLS Exam (BGP + MPLS) exam
Certification Provider: cisco
Exam Name: 642-691 – CCIP BGP + MPLS Exam (BGP + MPLS)
Related Certifications: CCIP
Language: English
Latest update:2010-05-01
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642-691 QUESTIONS ANSWERS WITH EXPLANATIONS
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642-691 BGP+ MPLS
BGP + MPLS Exam
Exam Number: 642-691
Associated Certifications: CCIP
Duration: 90 minutes (60 – 70 questions)
Available Languages: English
Click Here to Register: Pearson VUE
Exam Policies: Read current policies and requirements
Exam Tutorial: Review type of exam questions
Exam Description Exam Topics Recommended Training Additional Resources
Exam Description
The BGP+MPLS exam is the quickest way for currently certified CCIP (Cisco Certified Internetwork Professionals) to obtain recertification. The exam tests skills and knowledge pertaining to the Configuring BGP on Cisco Routers (BGP) and Implementing Cisco MPLS (MPLS) courses. BGP+MPLS may be taken to recertify your CCIP certification. It may also be taken in place of the BGP and MPLS exams required for the CCIP certification.
Exam Topics
The following information provides general guidelines for the content likely to be included on the BGP+MPLS Exam. However, other related topics may also appear on any specific delivery of the exam.
Technology
Understand and explain Core MPLS technology and concepts
Understand and explain MPLS VPN technology and concepts
Understand and explain basic BGP concepts and operations
Understand and explain how to Scale IGP and BGP in Service Provider Networks
Basic Implementation & Configuration
Explain and implement Frame-mode MPLS operations on Cisco IOS Platforms
Explain and implement Cell-mode MPLS operations on Cisco IOS Platforms
Explain and implement BGP Route Selection Using Policy Controls on Cisco IOS Platforms
Explain and implement BGP Route Selection Using BGP Attributes on Cisco IOS Platforms
Explain and implement Customer-to-Provider Connectivity with BGP on Cisco IOS Platforms
Explain and implement BGP Transit Autonomous System on Cisco IOS Platforms
Explain and implement IBGP connectivity using BGP Route Reflectors on Cisco IOS Platforms
Explain and implement BGP Confederations on Cisco IOS Platforms
Advanced Configuration
Explain and implement Advanced BGP Configuration on Cisco IOS Platforms
Explain and implement MPLS VPN operations on Cisco IOS Platforms
Explain and implement OSPF inside an MPLS VPN
Cisco 642-691
Cisco® CCIP BGP + MPLS Exam (BGP + MPLS)
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Question：1
For which purpose is the command mpls ldp maxhops used?
A. In large ATM-MPLS networks, the LFIB can become too large and it may be necessary to limit the maximum diameter of the MPLS LSPs.
B. Because downstream-on-demand label allocation uses hop count to control loop detection, it maybe necessary to limit the maximum diameter of the MPLS network.
C. Because end-to-end delay can cause problems with some voice applications, it may be
necessary to limit the maximum diameter of the MPLS network.
D. When interconnecting large frame mode MPLS and cell mode networks it may be necessary to limit the maximum network diameter to prevent forwarding loops.
ANSWER:B
Question：2
Refer to the diagram. What problem can be caused by the second P router summarizing the loopback address of the egress PE router?
A. The first P router will be faced with a VPN label which it does not understand.
B. The second P router will be faced with a VPN label which it does not understand.
C. The egress PE router will not be able to establish a label switch path (LSP) to the ingress PE router.
D. A label switch path (LSP) will be established from the ingress PE router to the egress PE router, an event that is not desirable.
E. The ingress PE router will not be able to receive the VPN label from the egress PE router via
MP-IBGP.
ANSWER:B
Question：3
In a central services topology, which routes do client VRFs contain?
routes from the client site, but not from the server site
B. routes from the server site, but not from the client site
C. routes from both the client site and the server site
D. only EBGP routes from either the client site or the server site
ANSWER:C
Question：4
On a dedicated subinterface implementation, PE-2 must establish an address-family vrf IPv4 BGP
neighbor relationship with which router?
A. CE-1
B. CE-2
C. PE-1
D. PE-IG
E. CE-1 and CE-2
F. PE-1 and PE-IG
ANSWER:B
Question：5
What are three drawbacks of a peer-to-peer VPN using a shared provider edge (PE) router? (Choose three.)
A full mesh of virtual circuits is required between the customer sites.
B. All the customers have to share a common IP address space.
C. Optimal routing between customer sites cannot be guaranteed.
D. The shared PE router has to know all routes for all customers.
E. Packet filters are required on the PE routers.
ANSWER:BDE
Question：7
Which two of the following statements regarding LDP are true? (Choose two.)
A. LDP can also be used between nonadjacent routers using multicast LDP hello messages.
B.LDP does not require periodic hello messages once the LDP session has been established between the LDP peers.
C. LDP hello messages use TCP packets with a destination port number of 646.
D. Multiple sessions can be established between a pair of LSRs if they use multiple label spaces.
E. Per-platform label space can be identified by a label space ID of 0 in the LDP identifier field.
ANSWER:DE
Question：8
What does the following command accomplish? sanjose#clear ip bgp 10.1.1.1 in prefix-filter
A. The sanjose router will perform an outbound soft reconfig to the 10.1.1.1 neighbor.
B. The sanjose router will send out the ORF prefix-list so that a new route refresh will be received from the 10.1.1.1 neighbor.
C. The 10.1.1.1 router will perform an inbound soft reconfig on the updates from the sanjose neighbor.
D. The 10.1.1.1 router will send out the ORF prefix-list so that a new route refresh will be received
from the sanjose neighbor.
E. The bgp session between the sanjose and the 10.1.1.1 router will be reset so that all the new bgp updates from the 10.1.1.1 router can be processed by the inbound prefix-list at the sanjose router.
F. The bgp session between the sanjose and the 10.1.1.1 router will be reset so that all the new bgp updates from the sanjose router can be processed by the inbound prefix-list at the 10.1.1.1 router.
ANSWER:B
Question：9
Which command is used to configure the external, confederation-wide AS number?
A. router(config)#router bgp {as-number}
B. router(config-router)#bgp confederation peers {as-number}
C. router(config-router)#bgp confederation identifier {as-number}
D. router(config-router)#bgp cluster-id {as-number}
E. router(config-router)#neighbor {ip address} remote-as {as-number}
ANSWER:C
Question：10
As the penalty for a flapping route decreases and falls below a certain limit, the route is unsuppressed. What is the name of that limit?
A. half-life limit
B. suppress limit
C. max-suppress-time limit
D. reuse limit
E. unsuppress limit
F. penalty limit
ANSWER:D