Download New Latest (May) Cisco 640-878 Actual Tests 1-10

By | May 17, 2015

Ensurepass

 

 

Exam A

 

QUESTION 1

Which segment protocol provides fast and predictable convergence (typically within 50 ms) in Layer 2 Ethernet ring topologies?

 

A.

Spanning Tree Protocol

B.

Flex Links

C.

Resilient Ethernet Protocol

D.

Spatial Reuse Protocol

E.

Resilient Packet Ring

 

Answer: C

Explanation: http://www.cisco.com/en/US/docs/switches/metro/me3400/software/release/12.2_40_se/co nfiguration/guide/swrep.html

 

Resilient Ethernet Protocol (REP) on the Cisco ME 3400E Ethernet Access switch. REP is a Cisco proprietary protocol that provides an alternative to Spanning Tree Protocol (STP) to control network loops, handle link failures, and improve convergence time. REP controls a group of ports connected in a segment, ensures that the segment does not create any bridging loops, and responds to link failures within the segment. REP provides a basis for constructing more complex networks and supports VLAN load balancing.

 

 

QUESTION 2

Which three Cisco platforms are classified as core routers? (Choose three.)

 

A.

Cisco XR 12000

B.

Cisco ME 3400

C.

Cisco ASR 1006

D.

Cisco CRS-3

E.

Cisco ASR 9010

F.

Cisco 3900

 

Answer: ADE

Explanation: Both the ASR 9010 andASR 9006 routers are designed with key capabilities to help deliver the services of tomorrow. Providing increased bandwidth capabilities for network devices at

 

 

 

economically viable prices is one of the primary criteria for true carrier-transport platforms.While traditional service prices continue to decline, the Cisco ASR 9000 Series helps establish a new financial reality by facilitating reliable and scalable video, nextgeneration mobile aggregation, and advanced Carrier Ethernet service offerings. The Cisco?XR 12000 Series and Cisco 12000 Series routers compose a portfolio of intelligent routing solutions that scale from 2.5- to n x10 Gbps capacity per slot, enabling carrier-class IP/Multiprotocol Label Switching (MPLS) networks and accelerating the evolution to IP Next-Generation Networks. Built upon a foundation of investment protection, this portfolio delivers up to 1.28-terabits-per-second switching capacity with wire-speed feature performance, scalability, and graceful hardware and software upgrade paths.

 

 

QUESTION 3

Refer to the topology diagram in the exhibit.

 

clip_image001

 

Which two interface configuration commands on the Cisco ME 3400-1 switch Fa0/1 interface are required to support the VLANs for Customer A to be trunked across the service provider network? (Choose two.)

 

A.

switchport access vlan 30

B.

switchport mode trunk

C.

switchport mode dot1q-tunnel

D.

switchport trunk allowed vlan 1-100

 

Answer: AC

Explanation: http://www.cisco.com/en/US/docs/switches/metro/me3400/software/release/12.2_25_ex/co nfiguration/guide/swtunnel.html

 

 

QUESTION 4

The permit 172.16.32.0 0.0.15.255 access-list entry permits exactly which IP address range?

 

A.

172.16.32.0 to 172.16.47.255

B.

172.16.32.0 to 172.16.48.255

C.

172.16.32.0 to 172.16.62.255

D.

172.16.32.0 to 172.16.63.255

E.

172.16.32.0 to 172.16.64.255

F.

172.16.32.0 to 172.16.255.255

 

Answer: A

 

 

QUESTION 5

Which statement about Cisco IOS XE software is true?

 

A.

It uses a two-stage configuration process.

B.

It is identical in look and feel to Cisco IOS software.

C.

It runs on the Cisco ASR 9010 platform.

D.

Packages can be added usingthe install add and install activate commands.

E.

It runs on the Cisco ME 3400 platform.

 

Answer: B

Explanation: http://www.cisco.com/en/US/prod/collateral/iosswrel/ps9442/ps11192/ps11194/QA_C67- 622903.html

 

 

 

The IOS feature set for routing and switching is unmatched in the industry, delivering functionality required for business critical applications. Preserving these advantages of IOS to our customers is critical for Cisco. IOS XE retains the exact same look and feel of IOS, while providing enhanced future-proofing and improved functionality. In IOS XE, IOS 15.0 runs as a single daemon within a modern Linux operatingsystem. Additional system functions now run as additional, separate processes in the host OS environment. The operation, support and management of IOS XE does not require re-training from classic IOS.

 

 

QUESTION 6

When upgrading a Cisco ASR 1001 Router, when is the request platform software package expand file bootflash:image-name command required?

 

A.

to copy the consolidated Cisco IOS XE image to the bootflash:

B.

to perform Cisco IOS ISSU on the standby route processor

C.

to run the router using a consolidated package

D.

to run the router using individual subpackages

 

Answer: D

Explanation: http://www.cisco.com/en/US/docs/routers/asr1000/configuration/guide/chassis/asrswcfg.pdf

 

 

 

clip_image002

 

C:Documents and Settingsuser-nwzDesktop1.JPG

 

 

QUESTION 7

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

 

A.

FIB

B.

RIB

C.

LFIB

D.

LIB

E.

CEF

 

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 8

Which first-hop router redundancy protocol uses the active virtual gateway to assign a virtual MAC address to the active virtual forwarders?

 

A.

HSRP

B.

VRRP

C.

GLBP

D.

FHRP

 

Answer: C

Explanation: http://www.cisco.com/en/US/docs/ios/12_2t/12_2t15/feature/guide/ft_glbp.html

 

 

QUESTION 9

DRAG DROP

 

clip_image003

Answer:

 

 

clip_image003[1]

 

A.

 

B.

 

C.

 

D.

 

 

Answer:

 

 

QUESTION 10

Which IPv6 address block is reserved for 6to4 tunneling?

 

A.

2000::/16

B.

2001::/16

C.

2002::/16

D.

3ffe::/16

E.

fe80::/16

 

Answer: C

Explanation: http://www.cisco.com/en/US/docs/ios/ipv6/configuration/guide/ip6-tunnel.html#wp1055738

 

Prerequisites

With 6to4 tunnels, the tunnel destination is determined by the border router IPv4 address, which is concatenated to the prefix 2002::/16 in the format 2002:border-router-IPv4- address::/48. The border router at each end of a 6to4 tunnel must support both the IPv4 and IPv6 protocol stacks.

 

Restrictions

Theconfiguration of only one IPv4-compatible tunnel and one 6to4 IPv6 tunnel is supported on a router. If you choose to configure both of those tunnel types on the same router, we strongly recommend that they do not share the same tunnel source. The reason that a 6to4 tunnel and an IPv4-compatible tunnel cannot share an interface is that both of them are NBMA “point-to-multipoint” access links and only the tunnel source can be used to reorder the packets from a multiplexed packet stream into a single packet stream for an incoming interface. So when a packet with an IPv4 protocol type of 41 arrives

 

 

 

on an interface, that packet is mapped to an IPv6 tunnel interface based on the IPv4 address. However, if both the 6to4 tunnel and the IPv4-compatible tunnel share the same source interface, the router is not able to determine the IPv6 tunnel interface to which it should assign the incoming packet.

IPv6 manually configured tunnels can share the same source interface because a manual tunnel is a “point-topoint” link, and both the IPv4 source and IPv4 destination of the tunnel are defined.

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