[March-2018]100% Exam Pass-640-875 PDF and 640-875 VCE Dumps Free from Braindump2go[21-31]

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QUESTION 21
Which three statements about the Cisco IOS XR task-based user authorization method are true? (Choose three.)

A. A user's association with a particular user group links that user to a particular set of task IDs.
A user that is associated with a task ID can execute any operation associated with that task ID.
B. Users can be assigned only to one user group.
C. Every user group is associated with one or more task groups.
D. Every task group is defined by a set of task IDs.
E. Each user is assigned a privilege level.
F. Each IOS XR CLI command is assigned a privilege level.
G. A task ID maps the IOS XR command to a privilege level.

Answer: ACD

QUESTION 22
Which three statements about Cisco IOS XR CLI operations are true? (Choose three.)

A. Cisco IOS XR uses a three-stage configuration method.
B. Committed changes are persistent across reboots in Cisco IOS XR.
C. The commit replace global configuration command replaces the contents of the running configuration
with the target configuration.
D. The save global configuration command saves the contents of target configuration to the running
configuration.
E. There is no concept of a startup-config in Cisco IOS XR.
F. The clear global configuration command erases the entire current running configuration.
G. The show running-config global configuration command displays the configuration that occurs if the
contents of the uncommitted changed (target configuration) are committed to the running configuration.

Answer: BCE

QUESTION 23
What is the result of using the Cisco IOS copy tftp: run command?

A. The running configuration on the Cisco IOS device is backed up to the TFTP server.
B. Only new configuration parameters from the saved configuration file on the TFTP server are added
to the running configuration. No changes to any existing configuration parameters in the running
configuration are made.
C. The running configuration on the Cisco IOS device is replaced with the saved configuration file on
the TFTP server.
D. The configuration stored in the TFTP server is merged with the running configuration on the Cisco
IOS device.
E. The saved configuration file from the TFTP server is copied to the target configuration.

Answer: D

QUESTION 24
Which component is integrated into the Cisco IPoDWDM interfaces?

A. ROADM
B. transponder
C. electrical cross connect
D. E-O-E converter
E. SONET/SDH controller

Answer: B

QUESTION 25
What is the SDH equivalent of the SONET STS-12 framing format?

A. SDH STM-1
B. SDH STM-4
C. SDH STM-12
D. SDH STM-16
E. SDH STM-64

Answer: B

QUESTION 26
What are the three RFC 1918 IPv4 private address ranges? (Choose three.)

A. 10.0.0.0 - 10.255.255.255
B. 172.16.0.0 - 172.255.255.255
C. 172.16.0.0 - 172.31.255.255
D. 192.168.0.0 - 192.168.31.255
E. 192.168.0.0 - 192.168.255.255

Answer: ACE

QUESTION 27
With a distance vector routing protocol like RIPv1, when is a route in the routing table placed in the "possibly down" state?

A. when a router receives an update from its neighbor router about a network in its routing table but with
a worse metric
B. when a router receives an update from its neighbor router about a network in its routing table but with
a better metric
C. when a router receives an update from its neighbor router indicating that a previously accessible network
is now inaccessible
D. whenever the router receives an update from its neighbor about a newly learned network
E. whenever the router interface that is used to reach the remote network goes down

Answer: C

QUESTION 28
When EIGRP is enabled on Cisco IOS XR, which EIGRP feature is on by default?

A. no auto-summary
B. stub routing
C. unequal cost paths load-balancing
D. no ip eigrp split-horizon
E. eigrp authentication

Answer: A

QUESTION 29
Which feature is used to protect the control plane of the router?

A. port security
B. uRPF
C. routing protocol authentication
D. VRF
E. SSH
F. SSL

Answer: C

QUESTION 30
Given the IP address of 209.168.200.155/27, which two options are the subnet that this IP address belongs to and the subnet broadcast IP address? (Choose two.)

A. 209.168.200.64 255.255.255.224
B. 209.168.200.96 255.255.255.224
C. 209.168.200.128 255.255.255.224
D. 209.168.200.95
E. 209.168.200.127
F. 209.168.200.159

Answer: CF

QUESTION 31
Given the CIDR address range of 200.165.160.0 to 200.165.191.255, what is the CIDR block?

A. 200.165.160.0/17
B. 200.165.160.0/18
C. 200.165.160.0/19
D. 200.165.160.0/20
E. 200.165.160.0/21

Answer: C

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