Download New Updated (June) Cisco 640-878 Practice Test 41-50

Ensurepass

 

QUESTION 41

On Cisco IOS XR software, which two of the address-family command options in IS-IS configuration mode are valid? (Choose two)

 

A.

address-family clns

B.

address-family ipv4 unicast

C.

address-family ipv6 unicast

D.

address-family vpnv4

E.

address-family vpnv6

 

Correct Answer: BC

Explanation:

http://www.cisco.com/en/US/docs/ios_xr_sw/iosxr_r3.8/routing/command/reference/rr38isis.pdf

To enter address family configuration mode for configuring Intermediate System-to-Intermediate System (IS-IS) routing that use standard IP Version 4 (IPv4) and IP Version 6 (IPv6) address prefixes, use the address-family command in router configuration or interface configuration mode. To disable support for an address family, use the no form of this command. Address family {ipv4 | ipv6} {unicast | mulitcast} no address-family {ipv4 | ipv6} {unicast | multicast}

 

 

 

 

 

 

 

QUESTION 42

On Cisco routers, the address-family configuration command in BGP configuration mode is used to enable which BGP feature?

 

A.

BGP route policy

B.

multiprotocol BGP

C.

BGP policy accounting

D.

BGP communities

 

Correct Answer: B

 

 

QUESTION 43

Your switch network has been configured to support multiple VLANs. In order for the users on one VLAN to communicate with users on another VLAN, which additional configuration is required?

 

A.

Enable a routing protocol like EIGRP on a router or on a Layer 3 capable switch

B.

Enable inter-VLAN routing on a router or on a Layer 3 capable switch

C.

Enable a switch virtual interface
on the router, using the interface vlan global configuration command

D.

Enable a switch virtual interface on the switch, using the encapsulation dot1q

E.

subinterface configuration command

F.

Enable IP routing on a Layer 2 switch

 

Correct Answer: B

 

 

QUESTION 44

Within an MPLS domain, which table is used by the label switch routers to make forwarding decisions when a labeled packet is received?

 

A.

FIB

B.

RIB

C.

LFIB

D.

LIB

E.

CEF

 

Correct Answer: C

Explanation:

http://www.cisco.com/en/US/docs/ios-xml/ios/mp_ldp/configuration/12-4m/mp-ldp-12-4m-book.pdf

 

 

QUESTION 45

On Cisco IOS XR software, what is the default commit option?

 

A.

best-effort

B.

psuedo-atomic

C.

replace

D.

force

 

Correct Answer: B

Explanation:

clip_image002

 

 

QUESTION 46

What is a requirement for performing Cisco IOS ISSU on the Cisco IOS XE-based ASR 1006 and ASR 1013 routers?

 

A.

must use consolidated package mode

B.

must use subpackage mode

C.

must have redundant RPs

D.

must have owner and nonowner SDRs

 

Correct Answer: C

Explanation:

clip_image004

QUESTION 47

Refer to the show command exhibit. Which statement is true?

 

clip_image006

 

A.

It shows the result of the target configuration merged with the running configuration.

B.

It shows the contents of the uncommitted configuration.

C.

It shows the contents of the failed configuration.

D.

It shows the contents of the running configuration.

 

Correct Answer: B

Explanation:

http://www.cisco.com/en/US/docs/ios_xr_sw/iosxr_r3.6/system_management/command/reference/ yr36conf.pdf

 

To display information about the current configuration session (target configuration), use the show configuration command in any configuration mode.

 

show
configuration [merge] [running]

 

 

QUESTION 48

When configuring a new VLAN on Cisco IOS switches, which configuration parameter is required?

 

A.

VLAN name

B.

native VLAN ID

C.

VLAN ID

D.

VLAN map

E.

VLAN MTU

 

Correct Answer: C

 

 

QUESTION 49

Refer to the partial Cisco IOS router configuration exhibit. Which statement is true?

 

clip_image008

 

A.

To support the subinterface configuration, the Fa0/0 main interface configuration is missing the encapsulation dot1Q command.

B.

The Fa0/0 interface/subinterfaces are configured correctly to operate as a trunk port to provide inter-VLAN routing for three VLANs (VLANs 1, 2, and 3).

C.

To provide inter-VLAN routing, the Fa0/0.1, Fa0/0.2 and Fa0/0.3 subinterface configuration is missing the encapsulation dot1Q vlan-id subinterface configuration command.

D.

To provide inter-VLAN routing, the router is missing the vlan 1, vlan 2, and vlan 3 global configuration commands.

 

Correct Answer: C

 

 

QUESTION 50

Refer to the partial Cisco IOS XR BGP configuration exhibit. Which two statements are true? (Choose two)

 

clip_image010

A.

This router uses its Loopback 0 interface IP address when establishing BGP peering with the 10.2.1.1 router.

B.

This router uses its Loopback 0 interface IP address when establishing BGP peering with the 192.168.101.11 router.

C.

Test1 refers to a route policy that is defined using the RPL.

D.

Both the IBGP and EBGP sessions will be authenticated.

E.

The IBGP session is missing the mandatory route-policy configuration.

 

Correct Answer: AC

 

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