Free Download Cisco 642-885 Practice Tests with PDF & VCE (41-50)

By | April 10, 2014

QUESTION 41
In Cisco IOS-XR, the ttl-security command is configured under which configuration mode?

A.    RP/0/RSP0/CPU0:P2(config)#
B.    RP/0/RSP0/CPU0:P2(config-bgp)#
C.    RP/0/RSP0/CPU0:P2(config-bgp-nbr)#
D.    RP/0/RSP0/CPU0:P2(config-bgp-af)#
E.    RP/0/RSP0/CPU0:P2(config-bgp-nbr-af)#

Answer: C

QUESTION 42
Refer to the exhibit. Given the partial BGP configuration, which configuration correctly completes the Cisco IOS-XR route reflector configuration where both the 1.1.1.1 and 2.2.2.2 routers are the clients and the 3.3.3.3 router is a non-client IBGP peer?

image

A.    neighbor 1.1.1.1
remote-as 65123
route-reflector-client
neighbor 2.2.2.2
remote-as 65123
route-reflector-client
neighbor 3.3.3.3
remote-as 65123
B.    neighbor 1.1.1.1
address-family ipv4 unicast
remote-as 65123
route-reflector-client
neighbor 2.2.2.2
address-family ipv4 unicast
remote-as 65123
route-reflector-client
neighbor 3.3.3.3
address-family ipv4 unicast
remote-as 65123
C.    neighbor 1.1.1.1
remote-as 65123
address-family ipv4 unicast
route-reflector-client
neighbor 2.2.2.2
remote-as 65123
address-family ipv4 unicast
route-reflector-client
neighbor 3.3.3.3
remote-as 65123
D.    neighbor 1.1.1.1 remote-as 65123
neighbor 1.1.1.1 route-reflector-client
neighbor 2.2.2.2 remote-as 65123
neighbor 2.2.2.2 route-reflector-client
neighbor 3.3.3.3 remote-as 65123

Answer: C

QUESTION 43
Which three methods can be used to reduce the full-mesh IBGP requirement in a service provider core network? (Choose three.)

A.    implement route reflectors
B.    enable multi-protocol BGP sessions between all the PE routers
C.    implement confederations
D.    implement MPLS (LDP) in the core network on all the PE and P routers
E.    enable BGP synchronization
F.    disable the IBGP split-horizon rule

Answer: ACD

QUESTION 44
Which type of BGP session behaves like an EBGP session during session establishment but behaves like an IBGP session when propagating routing updates where the local preference, multi-exit discriminator, and next-hop attributes are not changed?

A.    BGP sessions between a route reflector and its clients
B.    BGP sessions between a route reflector and its non-client IBGP peers
C.    BGP sessions between a route reflector and another route reflector
D.    Intra-confederation IBGP sessions
E.    Intra-confederation EBGP sessions

Answer: E

QUESTION 45
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

Answer: D

QUESTION 46
When implementing Anycast RP, the RPs are also required to establish which kind of peering with each other?

A.    BGP
B.    Multiprotocol BGP
C.    MSDP
D.    Bidirectional PIM
E.    PIM SSM

Answer: C

QUESTION 47
Refer to the Cisco IOS-XR show output exhibit. Which two statements are correct? (Choose two.)

image

A.    The RPF neighbor 192.168.11.1 is the path towards the RP for the 224.1.1.1 multicast group ”
B.    The RP for the 224.1.1.1 multicast group is reachable over the Gi0/0/0/0 interface
C.    This router is the RP for the 224.1.1.1 multicast group
D.    Incoming 224.1.1.1 multicast group traffic will be sent out through the Gi0/0/0/0 interface
E.    Incoming 224.1.1.1 multicast group traffic will be sent out through the Gi0/0/0/2 interface

Answer: AD

QUESTION 48
What must occur before an (S,G) entry can be populated in the multicast routing table?

A.    The (*,G) entry must have timed out
B.    The (*,G) entry OIL must be null
C.    The router must be directly connected to the multicast source
D.    The parent (*,G) entry must be created first

Answer: D

QUESTION 49
Which field in the IPv6 header can be used to set the DSCP value?

A.    Flow Label
B.    Type of Service
C.    Traffic Class
D.    Precedence
E.    EXP

Answer: C

QUESTION 50
Which mechanism is used by an IPv6 multicast receiver to join an IPv6 multicast group?

A.    IGMP report
B.    IGMP join
C.    MLD report
D.    General query
E.    PIM join

Answer: C

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