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試験番号：642-691問題集
試験科目：Cisco 「CCIP BGP + MPLS Exam (BGP + MPLS)」
問題と解答：全80問

試験番号：642-661問題集
試験科目：Cisco 「CCIP Configuring BGP on Cisco Routers (BGP)」
問題と解答：全204問

試験番号：642-611問題集
試験科目：Cisco 「CCIP Implementing Cisco MPLS Exam (MPLS)」
問題と解答：全509問

試験番号：642-642問題集
試験科目：Cisco 「Quality of Service (QoS)」
問題と解答：全87問

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NO.1 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
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

Cisco認定資格   642-691   642-691   642-691参考書   642-691

NO.2 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

Cisco   642-691認証試験   642-691参考書   642-691

NO.3 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

Cisco認定試験   642-691練習問題   642-691

NO.4 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

Cisco練習問題   642-691認定試験   642-691   642-691参考書

NO.5 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

Cisco   642-691   642-691問題集   642-691   642-691問題集

NO.6 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

Cisco認定試験   642-691   642-691   642-691

NO.7 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

Cisco   642-691   642-691認定証

NO.8 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

Cisco練習問題   642-691   642-691参考書   642-691

NO.9 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

Cisco認定資格   642-691過去問   642-691   642-691   642-691   642-691参考書

NO.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

Cisco   642-691認定試験   642-691練習問題   642-691

IT-Passports.comのCisco 642-661認定試験の教科書を利用してみよう

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試験番号：642-661問題集
試験科目：Cisco 「CCIP Configuring BGP on Cisco Routers (BGP)」
問題と解答：全204問

購入前にお試し,私たちの試験の質問と回答のいずれかの無料サンプルをダウンロード：http://www.it-passports.com/642-661.html

NO.1 Which BGP configuration option is designed to reduce router processing load caused by
unstable routes?
A.neighbor {ip-address} maximum-prefix {number}
B.bgp dampening
C.no sync
D.bgp deterministic-med
E.sync
F.bgp scan-time
Correct:B

Cisco認証試験   642-661   642-661

NO.2 Based on the following show ip bgp neighbors 2.2.2.2 output, which two statements are true?
(Choose two.)R1#show ip bgp neighbors 2.2.2.2BGP neighbor is 2.2.2.2, remote AS 102, internal
linkIndex 1, Offset 0, Mask 0x2BGP version 4, remote router ID 66.0.0.1BGP state=Established,
table version=1, up for 00:14:52Last read 00:00:52, hold time is 180, keepalive interval is 60
secondsMinimum time between advertisement runs is 5 secondsReceived 233 messages, 0
notifications, 0 in queueSent 206 messages, 0 notifications, 0 in queuePrefix advertised 0,
suppressed 0, withdrawn 0Connections established 17; dropped 16Last reset 00:15:02, due to
User reset18 accepted prefixes consume 576 bytes, maximum limit 20Threshold for warning
message 80%0 history paths consume 0 bytes
A.R1 has accepted 20 prefixes from the 2.2.2.2 IBGP neighbor.
B.R1 generated a warning message to the router's console after the 2.2.2.2 IBGP neighbor sent 16
prefixes to R1.
C.R1 generated a warning message to the router's console after the 2.2.2.2 IBGP neighbor sent 15
prefixes to R1.
D.R1 will drop its neighbor relationship to the 2.2.2.2 IBGP neighbor if 2.2.2.2 sends two more additional
prefixes to R1.
E.R1 will drop its neighbor relationship to the 2.2.2.2 IBGP neighbor if 2.2.2.2 sends three more additional
prefixes to R1.
Correct:B E

Cisco認証試験   642-661   642-661

NO.3 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 65001neighbor 172.16.1.1 remote-as
65001neighbor 2.2.2.2 remote-as 65001neighbor 4.4.4.4 remote-as 387!2.
____________________________!
A.2. network 172.16.0.0auto-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
Correct:B E

Cisco認証試験   642-661   642-661

NO.4 Refer to the exhibit. What effect will the route-map PEER-FILTER have on the route
24.11.62.0/24 with a community of 10:100 injected by the peer router in AS632?
A.weight will be set to 100
B.weight will be set to 150
C.local preference will be set to 105
D.weight will be set to 100, local preference will be set to 105
E.weight will be set to 150, local preference will be set to 105
Correct:A

Cisco認証試験   642-661   642-661

NO.5 What can cause a single sourced iBGP route not to be selected as the best route?
A.The BGP MED is 0.
B.The BGP next-hop is unreachable.
C.The BGP origin is incomplete.
D.The BGP weight is 0.
E.The BGP local preference is 0.
F.BGP synchronization is disabled.
Correct:B

Cisco認証試験   642-661   642-661

NO.6 Look at the picture.
Correct:
Green choice1---->Yellow Choice1
Green choice3---->Yellow Choice2
Green choice2---->Yellow Choice3
Green choice6---->Yellow Choice4

Cisco認証試験   642-661   642-661

NO.7 Look at the picture.
Correct:
Green choice6---->Yellow Choice1
Green choice1---->Yellow Choice2
Green choice3---->Yellow Choice3
Green choice5---->Yellow Choice4
Green choice4---->Yellow Choice5
Green choice2---->Yellow Choice6

Cisco認証試験   642-661   642-661

NO.8 In the diagram, the customer is using BGP to connect to a single ISP over two permanent links.
In this scenario, which input and output prefix-list filtering is typically enabled on the ISP routers?
(Choose two.)
A.ip prefix-list test-in permit 10.1.1.0/24 le 32
B.ip prefix-list test-in permit 10.0.0.0/8 le 32
C.ip prefix-list test-in permit 0.0.0.0/0
D.ip prefix-list test-out permit 10.1.1.0/24 le 32
E.ip prefix-list test-out permit 10.0.0.0/8 le 32
F.ip prefix-list test-out permit 0.0.0.0/0
Correct:A F

Cisco認証試験   642-661   642-661

NO.9 What are two purposes of the BGP scan-time command? (Choose two.)
A.to tune the BGP process which walks the BGP table and confirms the reachability of next hops
B.to allow faster detection of downed BGP peers
C.to improve BGP convergence time
D.to tune the BGP update interval
E.to decrease the effects of unstable routes by increasing the route suppression time
Correct:A C

Cisco認証試験   642-661   642-661

NO.10 Which two of the following are true regarding the BGP Prefix-Based outbound route filtering
feature? (Choose two.)
A.IP multicast routes are not supported.
B.Outbound route filtering is configured only on a per-address family basis.
C.Outbound route filtering can be configured for either iBGP or eBGP sessions.
D.The outbound route filter can be defined in a Prefix list, Distribute list or Access lists.
E.Outbound route filtering is more effective when a distance vector IGP is used.
Correct:A B

Cisco認証試験   642-661   642-661

NO.11 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}
Correct:C

Cisco認証試験   642-661   642-661

NO.12 When creating iBGP multipaths which three criteria must be met by multiple paths to the same
destination? (Choose three.)
A.Router IDs must be the same on all routers.
B.Each destination must have a different next-hop address.
C.The destination AS-number must be different for each destination.
D.Multi-exit discriminator attributes must be the same on all paths.
E.Interior Gateway Protocol distance must be identical on each path.
Correct:B D E

Cisco認証試験   642-661   642-661

NO.13 Which of these situations best describe when to use the AS number translation feature?
A.All single-homed customers are using public AS numbers.
B.All single-homed customers are using private AS numbers.
C.All multihomed customers are using public AS numbers.
D.All multihomed customers are assigned different AS numbers from different ISPs.
Correct:D

Cisco認証試験   642-661   642-661

NO.14 Which configuration will enable the R1 router in the AS51003 sub-AS (member-AS) as a route
reflector with neighbors 10.1.1.1 and 10.2.2.2 as its route-reflector clients?
A.! R1 router bgp 51003 bgp confederation identifier 55111 bgp confederation peers 51001 51002
neighbor 10.1.1.1 remote-as 51003 neighbor 10.2.2.2 remote-as 51003 neighbor 10.1.1.1
route-reflector-client neighbor 10.2.2.2 route-reflector-client
B.! R1 router bgp 51003 bgp confederation identifier 55111 bgp confederation peers 51001 51002
neighbor 10.1.1.1 remote-as 51001 neighbor 10.2.2.2 remote-as 51002 neighbor 10.1.1.1
route-reflector-client neighbor 10.2.2.2 route-reflector-client
C.! R1 router bgp 55111 bgp confederation identifier 51003 neighbor 10.1.1.1 remote-as 51003 neighbor
10.2.2.2 remote-as 51003 neighbor 10.1.1.1 route-reflector-client neighbor 10.2.2.2 route-reflector-client
D.! R1 router bgp 55111 bgp confederation identifier 51003 neighbor 10.1.1.1 remote-as 55111 neighbor
10.2.2.2 remote-as 55111 neighbor 10.1.1.1 route-reflector-client neighbor 10.2.2.2 route-reflector-client
Correct:A

Cisco認証試験   642-661   642-661

NO.15 How can you prevent multihomed customers with connections to two service providers from
acting as a transit AS?
A.Enable BGP synchronization on all the customer routers.
B.Use MED to influence the inbound traffic from the ISPs.
C.Use static routing to the ISPs.
D.Use an AS-path access-list to filter the BGP updates to the ISPs.
E.Use conditional advertisements when sending BGP updates to the ISPs.
Correct:D

Cisco認証試験   642-661   642-661

NO.16 Look at the picture.
Correct:
Green choice1---->Yellow Choice1
Green choice1---->Yellow Choice4
Green choice1---->Yellow Choice5
Green choice2---->Yellow Choice2
Green choice2---->Yellow Choice3

Cisco認証試験   642-661   642-661

NO.17 Based on the R1 router BGP configuration shown, which three statements are correct?
(Choose three.)
A.R1 is in AS 50101 according to the 192.168.100.1 neighbor.
B.R1 is in AS 50101 according to the 10.1.1.1 neighbor.
C.The 192.168.100.1 neighbor must be directly connected to R1.
D.R1 is a route-reflector client.
E.The 10.4.4.4 neighbor is an EBGP neighbor.
F.BGP updates coming in from the 192.168.100.1 neighbor must be processed by the setlp route-map.
Correct:A C F

Cisco認証試験   642-661   642-661

NO.18 Lab
Correct:

Cisco認証試験   642-661   642-661

NO.19 Which two of these statements about hierarchical route reflectors are correct? (Choose two.)
A.A route reflector can be a client of another route reflector.
B.Each cluster within the hierarchy can only contain one route reflector.
C.The hierarchy can be as deep as needed.
D.A route reflector can have clients in different clusters.
E.Hierarchical route reflectors are set up using three levels (access, distribution, and core layers).
Correct:A C

Cisco認証試験   642-661   642-661

NO.20 The neighbor {ip-address} maximum-prefix {maximum number} command prevents which
router condition?
A.frequent BGP session resets
B.routing instability
C.asymmetric routing
D.CPU and memory exhaustion
E.route flaps
Correct:D

Cisco認証試験   642-661   642-661

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