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

 

Exam Questions, Answers, Braindumps (640-878)

Thanx to www.exams.ws for giving handi questions for the help of the students.Here is my Contribution.

  

Q:  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

Q:  2

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

A. MST

B. PVST+

C. PVRST+

D. RSTP

Answer: A

Q:  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

Q:  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

Q:  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

Q:  6

Which IP addresses are matched by the permit 192.168.80.64 0.0.0.15 access-list entry?

A. 192.168.80.64 to 192.168.80.255

B. 192.168.80.64 to 192.168.80.96

C. 192.168.80.64 to 192.168.80.95

D. 192.168.80.64 to 192.168.80.80

E. 192.168.80.64 to 192.168.80.79

Answer: E

Q:  7

Which two statements about NAT444 are true? (Choose two.)

A. NAT444 packets are translated three times.

B. NAT packets traverse three IPv4 addressing domains.

C. NAT444 needs to work together with DNS64.

D. There are two types of NAT444 (stateful or stateless).

E. NAT is performed by the CPE and also by the service provider router.

Answer: B,E

Q:  8

Which two statements about NAT64 are true? (Choose two.)

A. NAT64 packets traverse two IPv4 addressing domains.

B. NAT64 packets are translated two times.

C. There are two types of NAT64 (stateful or stateless).

D. NAT is performed by the CPE and also by the service provider edge router.

E. The DNS64 server embeds the IPv4 address from the DNS A record with a preconfigured IPv6 translation prefix.

Answer: C,E

 

640-878


 

 

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