640-878: Building Cisco Service Provider Next-Generation Networks, Part 2

QUESTION 1
Which spanning-tree mode can be used to map several VLANs to a single spanning-tree
instance?

A. MST
B. PVST+
C. PVRST+
D. RSTP

Answer: A

Explanation:

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QUESTION 2
Which spanning-tree mode uses the name command to configure a region name?

A. MST
B. PVST+
C. PVRST+
D. RSTP

Answer: A

Explanation:

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QUESTION 3
Which procedure is used as the last resort disaster recovery procedure to completely replace the
currently installed IOS XR software on Cisco IOS XR routers?

A. netboot
B. turboboot
C. install recovery
D. install rollback
E. install add and install activate

Answer: B

Explanation: Explanation/Reference:
http://www.cisco.com/en/US/docs/routers/crs/software/crs_r4.0/migration/guide/tbupgapp.pdf

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QUESTION 4
Which file extension indicates a bootable installation file in Cisco IOS XR software?

A. .bin
B. .tar
C. .smu
D. .pie
E. .vm
F. .mini

Answer: E

Explanation: Explanation/Reference:

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QUESTION 5
When configuring an ACL entry, which network and wildcard mask matches only IP addresses
10.8.144.0 to 10.8.151.255?

A. 10.8.144.0 0.0.3.255
B. 10.8.144.0 0.0.7.255
C. 10.8.144.0 0.0.15.255
D. 10.8.144.0 0.0.252.255
E. 10.8.144.0 0.0.248.255
F. 10.8.144.0 0.0.240.255

Answer: B

Explanation:

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