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

Which statement describes a disadvantage of using the Cisco TFTP service to serve IP phone load files?
A . The Cisco TFTP services can run on only one Cisco Unified Communications Manager server in a cluster.
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.
C . If a response is not received in the timeout period, the TFTP server will not resend the data packet.
D . Packet loss can significantly increase the TFTP session completion time.
E . Because TFTP operates with an adaptive timeout period, the time to complete the file transfer is unpredictable.

View Answer

Answer: D

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