passguide ccip 642-691 pdf

Cisco 642-691
Cisco CCIP BGP + MPLS Exam (BGP + MPLS)

Q&A V3.21

www.PassGuide.com

(C) Copyright 2006-2009 CertBible Tech LTD,All Rights Reserved.

Important Note
Please Read Carefully

Study Tips

This product will provide you questions and answers carefully compiled and written by our experts. Try to understand the concepts behind the questions instead of cramming the questions.

Go through the entire document at least twice so that you make sure that you are not missing anything.

Latest Version

We are constantly reviewing our products. New material is added and old material is revised. Free updates are available for 120 days after the purchase. You should check your member zone at PassGuide an update 3-4 days before the scheduled exam date.

Feedback

If you spot a possible improvement then please let us know. We always interested in improving product quality.
Feedback should be send to feedback@passguide.com. You should include the following:
Exam number, version, page number, question number, and your login ID.
Our experts will answer your mail promptly.

Be Prepared. Be Confident. Get Certified.
————————————————————————————————————————-
Sales and Support Manager
Sales Team: sales@passguide.com Support Team: support@passguide.com
———————————————————————————————————————

Copyright

Each pdf file contains a unique serial number associated with your particular name and contact information for security purposes. So if we find out that a particular pdf file is being distributed by you, CertBible reserves the right to take legal action against you according to the International Copyright Laws.
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

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

3. In a central services topology, which routes do client VRFs contain?

A. 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

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

5. What are three drawbacks of a peer-to-peer VPN using a shared provider edge (PE) router? (Choose three.)

A. 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

6. 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

7. Refer to the exhibit. Which two of the following statements about the MPLS configurations are true? (Choose two.)

A. The VPI range being configured is the default VPI range.
B. The router is missing the mpls label protocol ldp configuration command on its ATM 0/0.1 subinterface to make it an LC-ATM enabled subinterface.
C. There is a problem with the configurations because the control VC should be set to 0 32 instead.
D. The ATM switch is using VC merge since VC merge is enabled by default.
E. For MPLS label allocations, both VPI 6 and 7 can be used.

Answer: DE

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

9. Based on the topology diagram shown in the exhibit, when should BGP be used as the routing protocol between the customer and the ISP?

A. If physical link failures can not be detected by the link-level procedures.
B. If the customer wants to affect how the ISP will route the customer’s traffic out to the rest of the Internet.
C. If the ISP does not support static routing with the customer.
D. If the customer is using provider-assigned (PA) addresses inside the customer’s network.
E. If the customer is using private addresses inside the customer’s network.

Answer: A

10. Based on the network diagram shown in the exhibit, what is the correct configuration on the customer edge router used to conditionally announce the customer networks to the ISP?

A. router bgp 65001
! neighbor commands not shown
network 192.168.8.0 mask 255.255.252.0
!
ip route 192.168.8.0 255.255.252.0 192.168.8.33

B. router bgp 65001
! neighbor commands not shown
aggregate-address 192.168.8.0 255.255.252.0 summary-only
!
ip route 192.168.8.0 255.255.252.0 192.168.8.33

C. router bgp 65001
! neighbor commands not shown
network 192.168.8.0
network 192.168.9.0
network 192.168.10.0
network 192.168.11.0
!
ip route 192.168.8.0 255.255.255.0 null0
ip route 192.168.9.0 255.255.255.0 null0
ip route 192.168.10.0 255.255.255.0 null0
ip route 192.168.11.0 255.255.255.0 null0

D. router bgp 65001
! neighbor commands not shown
aggregate-address 192.168.8.0 255.255.252.0 summary-only
!
router ospf 1
network 192.168.8.0 0.0.3.255 area 0

E. router bgp 65001
! neighbor commands not shown
aggregate-address 192.168.8.0 255.255.252.0
!
ip route 192.168.8.0 255.255.252.0 null0

Answer: A

11. Which two statements about a transit AS are correct? (Choose two.)

A. A transit AS has eBGP connection(s) to only one external AS.
B. Routes between ASs are always exchanged via eBGP.
C. A transit AS uses an IGP like OSPF or ISIS to propagate the external networks within the transit AS.
D. Core routers within a transit AS normally use default routing to reach the external networks.
E. iBGP sessions can be established between non directly connected routers.

Answer: BE

12. Based on the network diagram shown in the exhibit, both R5 and R6 are clients of the R2 RR. When the 10.0.0.0/8 iBGP update from R3 is received by the R2 RR, which router(s) will R2 reflect the update to?

A. R1 only
B. R5 and R6
C. R5, R6 and R1
D. R4, R5 and R6
E. R4, R5, R6 and R1
F. to no other router

Answer: C

13. Which show command can be used to display the originator ID and cluster-list?

A. show ip bgp
B. show ip bgp sum
C. show ip route bgp
D. show ip route {prefix}
E. show ip bgp {prefix}
F. show ip bgp neighbors {ip address}

Answer: E

14. 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

15. 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

16. What is the difference in implementation between a managed CE services MPLS VPN and a central services MPLS VPN?

A. RD assignment
B. selective routes export
C. selective routes import
D. MP-BGP route redistribution filtering
E. CE-PE routing process
F. none

Answer: B

17. In a Transit AS, how do the internal routers within the Transit AS forward packets destined for the external networks using a scalable solution?

A. using the default route
B. using the IGP routes where the external networks are redistributed into the IGP by the edge routers
C. using the EBGP routes where the external networks are redistributed into the IBGP by the edge routers
D. using the IBGP routes, then using recursive lookup based on IGP information to resolve the BGP next-hop

Answer: D

18. Given the following configurations, R2 and R3 are not able to successfully establish the IBGP session using the loopback 0 interfaces. What could be the cause of this problem?

!
! output omitted
!
hostname R2
!
interface loopback 0
ip address 2.2.2.2
!
interface e0
ip address 10.1.1.1 255.255.255.0
no shut
!
interface e1
ip address 10.2.2.1 255.255.255.0
no shut
!
router bgp 65101
neighbor 172.16.1.1 remote-as 65100
neighbor 3.3.3.3 remote-as 65101
!
router eigrp 101
network 10.0.0.0
network 2.0.0.0
!
!! output omitted
!
hostname R3
!
interface loopback 0
ip address 3.3.3.3
!
interface e0
ip address 10.1.1.2 255.255.255.0
no shut
!
interface e1
ip address 10.2.2.2 255.255.255.0
no shut
!
router bgp 65101
neighbor 192.168.1.1 remote-as 65102
neighbor 2.2.2.2 remote-as 65101
!
router eigrp 101
network 10.0.0.0
network 3.0.0.0
!

A. The “No Sync” BGP configuration command is missing.
B. R2 and R3 are not using the loopback0 IP address as the source address for the BGP messages to each other.
C. The “network 2.0.0.0″ BGP configuration command is missing on R2 and the “network 3.0.0.0″ BGP configuration command is missing on R3.
D. The “neighbor 2.2.2.2 ibgp-multihop 2″ BGP configuration command is missing on R3 and the “neighbor 3.3.3.3 ibgp-multihop 2″ BGP configuration command is missing on R2.

Answer: B

19. AS-Path prepending is used in AS1 in order to influence the return traffic path from AS 5 to AS 1 through the higher speed path via AS 2. needs to be configured for AS-Path prepending and a minimum of of the AS number should be prepended.

A. R1; one copy
B. R2; one copy
C. R1; two copies
D. R2; two copies
E. R2; three copies

Answer: C

20. In a multihomed environment with two ISP connections, which two statements are true? (Choose two.)

A. The customer should not be configured to act as a transit AS between the two ISPs.
B. It is recommended that the multi-homed customer use a registered (public) AS number.
C. AS-Path prepending can be configured on the customer’s edge router to influence the BGP path selection process for the outbound traffic (traffic from the customer to the ISPs).
D. The customer can use Local Preference on the customer’s edge routers to influence the BGP path selection process for the inbound traffic (traffic from the ISPs to the customer).
E. The advertisement of the customer’s IP address space can be conditioned by the customer’s edge routers by using a static route to the null0 interface and by using the proper network statement under router bgp.

Answer: AB

21. Which two configuration commands will complete the BGP configuration on R1 so it will conditionally announce the 172.0.0.0/8 prefix to R4 via BGP? (Choose two.)

hostname R1
!
!output omitted
!
1. ___________________________
!
router bgp 65001
neighbor 172.16.1.1 remote-as 65001
neighbor 2.2.2.2 remote-as 65001
neighbor 4.4.4.4 remote-as 387
!
2. ____________________________
!

A. 2. network 172.16.0.0 auto-summary
B. 2. network 172.0.0.0 mask 255.0.0.0
C. 1. ip route 172.0.0.0 255.0.0.0 null0
D. 1. ip route 172.0.0.0 255.0.0.0 null0 255
E. 1. ip route 172.0.0.0 255.0.0.0 172.16.1.1
F. 2. aggregate-address 172.0.0.0 mask 255.0.0.0

Answer: BE

PassGuide Cisco Exams Questions & Training Materials

1. Free testinside cisco ccip 642-611 exam
2. Free passguide cisco CCIP 642-661
3. Free How to filter OSPF routes that have the same source ip
4. Free passguide cisco CCIP 642-611
5. Free Download New p4s cisco Composite ccnp 642-892 321 Q&As 4.52
6. Free p4s cisco ccnp bsci 642-901 2.95 3.10
7. Free passguide cisco 642-112
8. Free free passguide actualtest cisco ccip 642-661 exam vce format
9. Free CCNA Lab 2 Set Router Port Address/Label and Save Settings
10. Free passguide cisco ccip 642-691 v2.93
11. Free CCNA 2 – Module 2 Exam Answers
12. Free passguide cisco ccip 642-611 v2.83