[Free] Download Latest (March 2016) Cisco 642-885 Real Exam 81-90

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QUESTION 81

DRAG DROP

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Correct Answer:

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QUESTION 82

Which Cisco IOS XR command setssuccessfully configure a value of 20 for the advertisement-interval?

 

A.

RP/0/RSP0/CPU0:routerconfig)# router bgp 65512

RP/0/RSP0/CPU0:router(config-bgp)# session-group test

RP/0/RSP0/CPU0:router(config-bgp-sngrp)# advertisement-interval 20

RP/0/RSP0/CPU0:router(config-bgp-sngrp)# exit

RP/0/RSP0/CPU0:router(config-bgp)# neighbor-group test

RP/0/RSP0/CPU0:router(config-bgp-nbrgrp)# advertisement-interval 25

RP/0/RSP0/CPU0:router(config-bgp-nbrgrp)# exit

RP/0/RSP0/CPU0:router(config-bgp)# exit

RP/0/RSP0/CPU0:router(config-bgp)# neighbor 192.168.1.1

RP/0/RSP0/CPU0:router(config-bgp-nbr)# remote-as 65513

RP/0/RSP0/CPU0:router(config-bgp-nbr)# use session-group test

RP/0/RSP0/CPU0:router(config-bgp-nbr)# use neighbor-group test

B.

RP/0/RSP0/CPU0:routerconfig)# router bgp 65512

RP/0/RSP0/CPU0:router(config-bgp)# session-group test

RP/0/RSP0/CPU0:router(config-bgp-sngrp)# ebgp-multihop 2

RP/0/RSP0/CPU0:router(config-bgp-sngrp)# exit

RP/0/RSP0/CPU0:router(config-bgp)# neighbor-group test

RP/0/RSP0/CPU0:router(config-bgp-nbrgrp)# advertisement-interval 20

RP/0/RSP0/CPU0:router(config-bgp-nbrgrp)# exit

RP/0/RSP0/CPU0:router(config-bgp)# exit

RP/0/RSP0/CPU0:router(config-bgp)# neighbor 192.168.1.1

RP/0/RSP0/CPU0:router(config-bgp-nbr)# remote-as 65513

RP/0/RSP0/CPU0:router(config-bgp-nbr)# use session-group test

RP/0/RSP0/CPU0:router(config-bgp-nbr)# use neighbor-group test

C.

RP/0/RSP0/CPU0:routerconfig)# router bgp 65512

RP/0/RSP0/CPU0:router(config-bgp)# session-group test

RP/0/RSP0/CPU0:router(config-bgp-sngrp)# exit

RP/0/RSP0/CPU0:router(config-bgp)# neighbor-group test

RP/0/RSP0/CPU0:router(config-bgp-nbrgrp)# exit

RP/0/RSP0/CPU0:router(config-bgp)# exit

RP/0/RSP0/CPU0:router(config-bgp)# neighbor 192.168.1.1

RP/0/RSP0/CPU0:router(config-bgp-nbr)# remote-as 65513

RP/0/RSP0/CPU0:router(config-bgp-nbr)# use session-group test

RP/0/RSP0/CPU0:router(config-bgp-nbr)# use neighbor-group test

D.

RP/0/RSP0/CPU0:routerconfig)# router bgp 65512

RP/0/RSP0/CPU0:router(config-bgp)# session-group test

RP/0/RSP0/CPU0:router(config-bgp-sngrp)# advertisement-interval 25

RP/0/RSP0/CPU0:router(config-bgp-sngrp)# exit

RP/0/RSP0/CPU0:router(config-bgp)# neighbor-group test

RP/0/RSP0/CPU0:router(config-bgp-nbrgrp)# advertisement-interval 20

RP/0/RSP0/CPU0:router(config-bgp-nbrgrp)# exit

RP/0/RSP0/CPU0:router(config-bgp)# exit

RP/0/RSP0/CPU0:router(config-bgp)# neighbor 192.168.1.1

RP/0/RSP0/CPU0:router(config-bgp-nbr)# remote-as 65513

RP/0/RSP0/CPU0:router(config-bgp-nbr)# use session-group test

RP/0/RSP0/CPU0:router(config-bgp-nbr)# use neighbor-group test

 

Correct Answer: A

 

 

QUESTION 83

The bsr-border router PIM interface configuration command is used for what purpose?

 

A.

To enable the router as the candidate RP

B.

To enable the router as the candidate BSR

C.

To enable the router as the BSR mapping agent

D.

To set up an administrative boundary to prevent BSR messages from being sent out through an interface

E.

To define a boundary to restrict the RP discovery and announcement messages from being sent outside the PIM-SM domain

 

Correct Answer: D

 

 

QUESTION 84

A network engineer is working for an ISP and a current eBGP customer requests to enable the BGP TTL security feature. The engineer sees from the current established BGP session that the eBGP peer is directly connected and the ebgp-multihop feature is already in use with a value of one. Which two actions are needed on the Cisco IOS XR router to accomplish the task? (Choose two.)

 

A.

Configure the neighbor with the command ttl-security.

B.

Disable the eBGP-multihop feature.

C.

Clear the BGP session for the configuration change to take effect.

D.

< span lang="EN-US" style="font-family: ; mso-font-kerning: 0pt; mso-no-proof: yes">Enable the BGP TTL security and the BGP peer resets automatically for the change to take effect.

E.

Configure the neighbor with the command ttl-security 254.

 

Correct Answer: AC

 

 

QUESTION 85

With PIM-SM operations, which four pieces of information are maintained in the multicast routing table for each (*,G) or (S,G) entry? (Choose four.)

 

A.

RPF Neighbor

B.

RP Set

C.

Incoming Interface

D.

OIL

E.

DF priority

F.

PIM SM state flags

 

Correct Answer: ACDF

Explanation:

The following is sample output from the show ip mroute command for a router operating in sparse mode:

 

show ip mroute

IP Multicast Routing Table

Flags: D – Dense, S – Sparse, C – Connected, L – Local, P – Pruned

R – RP-bit set, F – Register flag, T – SPT-bit set Timers: Uptime/Expires

Interface state: Interface, Next-Hop, State/Mode

(*, 224.0.255.3), uptime 5:29:15, RP is 198.92.37.2, flags: SC

Incoming interface: Tunnel0, RPF neighbor 10.3.35.1, Dvmrp

Outgoing interface list:

Ethernet0, Forward/Sparse, 5:29:15/0:02:57

(198.92.46.0/24, 224.0.255.3), uptime 5:29:15, expires 0:02:59, flags: C

Incoming interface: Tunnel0, RPF neighbor 10.3.35.1 Outgoing interface list:

Ethernet0, Forward/Sparse, 5:29:15/0:02:57

 

 

 

 

 

 

 

QUESTION 86

You noticed a recent change to the BGP configuration on a PE router, the bgp scan time has been changed from the default value to 30s. Which three effects will this change have? (Choose three.)

 

A.

The BGP table will be examined and verified more frequently

B.

The BGP keepalive messages will be sent to the BGP peers at a faster rate

C.

The BGP table will be modified more quickly in the event that a next-hop address becomes unreachable

D.

The CPU load of the router will increase

E.

The minimum time interval between sending EBGP and IBGP routing updates will decrease

F.

The BGP convergence time will increase

 

Correct Answer: ACD

 

 

QUESTION 87

Which command set should be used for a 6to4 tunnel in a Cisco IOS XE router, considering the border interface with IPv4 address of 209.165.201.2?

 

A.

interface Tunnel2002

ipv6 enable

ipv6 address 2002:D1A5:C902::1/128

tunnel source Ethernet0/0

tunnel mode ipv6ip 6to4

B.

interface Tunnel2002

ipv6 enable

ipv6 address 2002:D1A5:D902::1/128

tunnel source Ethernet0/0

tunnel mode ipv6ip 6to4

C.

interface Tunnel2002

ipv6 enable

ipv6 address 2002:D1A5:D902::1/128

tunnel source Ethernet0/0

tunnel mode ipv6ip

D.

interface Tunnel2002

ipv6 enable

ipv6 address 2002:D1A5:C902::1/128

tunnel source Ethernet0/0

tunnel mode ipv6ip auto-tunnel

E.

interface Tunnel2002

ipv6 enableipv6 address 2002:D1A5:D902::1/128

tunnel source Ethernet0/0

tunnel mode ipv6ip auto-tunnel

 

Correct Answer: B

 

 

QUESTION 88

Which two options areadvantages of an IPv6 dual-stack implementation in an enterprise environment? (Choose two.)

 

A.

simplifies the route redistribution policies complexity

B.

requires IPv6-to-IPv4 translation on the uplinks to the service providers

C.

provides built-in support for Kerberos authentication

D.

does not have to worry about NAT traversal

E.

supports multicast properly

 

Correct Answer: DE

 

 

QUESTION 89

Which keyword is used in the syntax to refer to Cisco IOS XR address-family groups, session groups, or neighbor groups?

 

A.

inherit

B.

apply

C.

use

D.

commit

 

Correct Answer: C

 

 

QUESTION 90

Assume that the R1 router is enabled for PIM-SM and receives a multicast packet sourced from 172.16.1.100, and the R1 router has multicast receivers on the Gi0/1, Gi0/2, Gi0/3 and Gi0/4 interfaces. The multicast packet from the 172.16.1.100 source must arrive on which interface on the R1 router for it to be forwarded out the other interfaces?

 

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A.

Gi0/1

B.

Gi0/2

C.

Gi0/3

D.

Gi0/4

E.

Gi0/1 or Gi0/2 or Gi0/3 or Gi0/4

F.

Gi0/2 or Gi0/3

G.

Gi0/1 or Gi0/4

 

Correct Answer: A

 

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