Free 640-878 Braindumps


  • Exam Number: 640-878
  • Provider: Cisco
  • Questions: 126
  • Updated On: 14-Jun-2019

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(s): A
QUESTION: 2
Which spanning-tree mode uses the name command to configure a region name?

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

Answer(s): A
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(s): B
Explanation:
http://www.cisco.com/en/US/docs/routers/crs/software/crs_r4.0/migration/guide/tbupgapp.pdf
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(s): E
Explanation:

https://xcerts.com

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