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READ Free Dumps For Cisco- 400-051





Question ID 12873

Which statement describes a disadvantage of using the Cisco TFTP service to serve IP
phone load files?

Option A

The Cisco TFTP services can run on only one Cisco Unified Communications Manager server in a cluster.

Option B

 Because TFTP operates on top of UDP, there is a high risk of corrupted load file delivery at the completion of the TFTP process due to undetected data loss in the network.

Option C

If a response is not received in the timeout period, the TFTP server will not resend the data packet.

Option D

Packet loss can significantly increase the TFTP session completion time.

Option E

Because TFTP operates with an adaptive timeout period, the time to complete the file transfer is unpredictable.

Correct Answer D
Explanation Explanation: Voice traffic cannot recapture lost packets. Rather than retransmitting a lost network connection, the phone resets and attempts to reconnect its network connection. Reference: http://www.cisco.com/en/US/docs/voice_ip_comm/cuipph/6921_6941_6961/7_1_2/english/ admin/guide/6921trb.html#wp1031181


Question ID 12874

Which capability is supported by Cisco Discovery Protocol but not by LLDP-MED?

Option A

LAN speed and duplex discovery

Option B

Network policy discovery

Option C

 Location identification discovery

Option D

Power discovery

Option E

Trust extension

Correct Answer E
Explanation Explanation: Cisco Discovery Protocol provides an additional capability not found in LLDP-MED that allows the switch to extend trust to the phone. In this case, the phone is now trusted to mark the packets received on the PC port accordingly. This feature can be used to off-load the switch because now it does not need to police the information being received from the phone.

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