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The Best Cisco CCNP Service Provider 642-883 Dumps Exam Questions And Answers (Q1-Q20)
QUESTION 1
In comparing IS-IS with OSPF, a Level-1-2 IS-IS router is similar to which kind of OSPF router?
A. ASBR on a normal OSPF area
B. ASBR on NSSA
C. ABR on totally stubby OSPF area
D. ABR on stubby OSPF area
E. ABR on a normal OSPF area
Correct Answer: C
QUESTION 2
Refer to the topology diagram in the exhibit.
Which IS-IS feature could be implemented so that the return path for the packets from router Y in area 49.00AA to router X in area 49.00BB will use the more optimal path?
A. Enable route leaking to pass Level 2 information into the Level 1 routers.
B. Change the area 49.00AA type from a stub area to a regular area.
C. Change the IS-IS administrative distance on router Y in area 49.00AA.
D. Change the IS-IS metric type from narrow to wide on all IS-IS routers.
Correct Answer: A
QUESTION 3
Refer to the exhibit.
Which two configuration options can be used to optimize the IS-IS network scenario? (Choose two.)
A. Change the R1 and R2 IS type to Level 2.
B. Change the R1 and R2 IS type to Level 1.
C. Change the gi0/0 interface IS-IS circuit type on R1 and R2 to Level 2 only.
D. Change the gi0/1 interface IS-IS circuit type on R1and R2 to Level 1.
E. Change the IS type for all the routers to Level-1-2.
F. Change the IS-IS network type for all the routers to point-to-point.
Correct Answer: CD
QUESTION 4
The Cisco IOS XE Software summary-address router IS-IS configuration command can be used to send a summarized route into which IS-IS hierarchy?
A. Level 1 only
B. Level 2 only
C. Level-1-2 only
D. Level 1 or Level 2 or Level-1-2
Correct Answer: D
QUESTION 5
Refer to the Cisco IOS XE IS-IS configuration exhibit.
What are two problems with the configuration that are causing the IPv4, or the IPv6, or the IPv4 and IPv6 IS-IS operations to fail? (Choose two.) 642-883 dumps
A. The configuration is missing the interface gi0/0 and interface gi0/0 commands under router isis 1.
B. The configuration is missing the address-family ipv4 unicast and address-family ipv6 unicast commands under router isis 1.
C. IPv6 unicast routing has not been enabled globally on the Cisco IOS XE router.
D. The gi0/0 and gi0/1 interfaces are not participating in the router isis 1 routing instance.
E. Multitopology IS-IS must be enabled to support both IPv4 and IPv6.
F. Another router isis instance must be enabled to support IPv6.
Correct Answer: CD
QUESTION 6
In which network environment is IS-IS adjacency check important?
A. in a multitopology environment where there are different instances of IS-IS running on the same router
B. in an IPv4/IPv6 environment and running single-topology IS-IS
C. when a level L1/L2 IS-IS router is neighboring with a Level 1 only or Level 2 only router
D. when IS-IS neighbors are in an NBMA environment like over Frame Relay
E. when IS-IS neighbors are in a broadcast environment like an Ethernet LAN
Correct Answer: B
QUESTION 7
Refer to the IS-IS configuration exhibit.
This is the typical IS-IS configuration of the routers in an AS using IS-IS as the IGP. This AS is in the transition phase of integrating IPv6 into the network. During this transition phase, some of the routers within the AS might be running IPv4 only, some might be running IPv6 only, and others might be running both IPv4 and IPv6. To avoid any black holes for the IPv6 traffic, which configuration change can be made?
A. Disable IS-IS adjacency checks.
B. Enable IPv6 adjacency over IPv4 IS-IS peering.
C. Enable multi-topology IS-IS.
D. Disable the IPv4 unicast address-family.
E. Enable IS-IS wide metric to support the single-topology mode.
Correct Answer: C
QUESTION 8
When implementing OSPF, which type of networks require DR/BDR election?
A. point-to-point networks
B. mutli-access broadcast networks
C. non-broadcast multi-access networks (Hub and Spoke Frame Relay) using point-to-multipoint OSPF network type
D. All networks type
Correct Answer: B
QUESTION 9
The S bit in the MPLS header is used for what purpose?
A. To indicate the bottom level in the label stack
B. To indicate if LDP is sync to the IGP
C. To indicate if LDP is sync to the IGP
D. To indicate the status of the LSP
Correct Answer: A
QUESTION 10
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 Answer: AC
QUESTION 11
When using the show bgp ipv6 unicast summary command to verify the IPv6 BGP session status with the IPv6 BGP peers, you noticed the “St/PfxRcd” status for one of the IPv6 BGP peers is in the “Active” state. What does the “Active” state indicate?
A. The IPv6 BGP session has been established with the IPv6 BGP peer.
B. The router is in the process of sending BGP routing updates to the IPv6 BGP peer.
C. The router is in the process of establishing the IPv6 BGP session with the IPv6 BGP peer.
D. The router is exchanging BGP notification messages with its IPv6 BGP peer.
Correct Answer: C
QUESTION 12
Which three BGP configuration groupings are supported on Cisco IOS XR Software? (Choose three.)
A. peer-group
B. af-group
C. bgp-group
D. session-group
E. neighbor-group
F. as-group
Correct Answer: BDE
QUESTION 13
Which AS path access list is used by a multihomed customer to only announce their own address space to their service providers to prevent the multihomed customer from becoming a transit AS?
A. ip as-path access-list permit.*
B. ip as-path access-list permit^$
C. ip as-path access-list permit _$
D. ip as-path access-list permit _^
E. ip as-path access-list permit local-asip as-path access-list deny *
F. ip as-path access-list deny.*ip as-path access-list permit *
Correct Answer: B
QUESTION 14
What is recursive lookup in BGP and how does it work?
A. The router looks up the EBGP route and the EBGP next hop to reach a destination in the remote AS.
Then the router looks up the route to reach the EBGP next hop using the IBGP.
B. The router looks up the IBGP route and the IBGP next hop to reach a destination in the remote AS.
Then the router looks up the route to reach the IBGP next hop using the EBGP.
C. The router looks up the BGP route and the BGP next hop to reach a destination in the remote AS.
Then the router looks up the route to reach the BGP next hop using the IGP.
D. The router looks up the route and the next hop to reach a destination in the remote AS using the IGP. Then the router looks up the route to reach the next hop using BGP.
E. The router perform three routing lookups to determine the route to reach a destination in the remote AS. The first lookup is done using EBGP, the second lookup is done using IBGP, and the third lookup is done using the IGP.
Correct Answer: C
QUESTION 15
Which reserved AS number or range of numbers is used for backward compatibility between old BGP peers using 16-bit AS number and new BGP peers using 32-bit AS number?
A. AS 65001 to 65535
B. AS 65512 to 65535
C. AS 12345
D. AS 23456
E. AS 64001
Correct Answer: D
QUESTION 16
Which BGP attribute is a set of generic tags that can be used to signal various routing policies between BGP routers?
A. AS path
B. MED
C. weight
D. communities
E. route tags
Correct Answer: D
QUESTION 17
Which of the following is a characteristic of dual-multihomed connectivity between an enterprise network and the service provider network or networks? 642-883 dumps
A. An enterprise network that is connected to two or more different service providers with two or more links per service provider and using BGP to exchange routing updates with the service providers.
B. Each service provider announces a default route on each of the links that connect to the customer with a different metric.
C. An enterprise network announces a default route to each service provider.
D. Load balancing can be achieved using the maximum-paths command.
Correct Answer: A
QUESTION 18
What are two ways to advertise networks into BGP? (Choose two.)
A. using the neighbor router BGP command
B. using a route policy in Cisco IOS XR Software or using a route map in Cisco IOS Software or Cisco IOS XE Software
C. using route redistribution into BGP
D. using the network router BGP command
E. enabling an interface to run BGP using the interface router BGP command
Correct Answer: CD
QUESTION 19
Refer to the network diagram in the exhibit.
Assuming the IBGP session within AS 64500 was established using the loopback 0 interface between the two routers, by default, what will be the next hop of the routes from AS 64501 when the routes appear on the router running IBGP only in AS 64500?
A. 192.168.101.11
B. 192.168.101.10
C. 10.1.1.1
D. 10.0.1.1
E. 10.1.10.1
Correct Answer: A
QUESTION 20
When configuring BGP on Cisco IOS XR Software, which address-family is enabled by default?
A. IPv4 unicast
B. IPv6 unicast
C. VPNv4
D. IPv4 unicast and IPv6 unicast
E. IPv4 unicast and IPv6 unicast and VPNv4
F. No address-family is enabled by default.
Correct Answer: F
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