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READ Free Dumps For Cisco- 400-051





Question ID 12879

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

Option A

LAN speed discovery

Option B

network policy discovery

Option C

location identification discovery

Option D

power discovery

Option E

trust extension

Correct Answer A
Explanation Explanation: LLDP-MED supports both LAN speed and duplex discovery. Cisco Discovery Protocol supports duplex discovery only, but this limited support is not seen as a problem because if there is a speed mismatch, LLDP-MED and Cisco Discovery Protocol cannot be exchanged and thus cannot be used to detect the mismatch.


Question ID 12880

Which two statements about using the Load Server option for IP phone firmware
distribution are true? (Choose two.)

Option A

This option must be enabled on at least two servers in a Cisco Unified Communications Manager cluster.

Option B

This option must be enabled on Cisco Unified Communications Manager service parameters for Cisco TFTP.

Option C

Phone firmware must be manually copied to any applicable load servers.

Option D

The load server will not function if its IP address is not in the same subnet as the IP phones.

Option E

This option is only available for newer IP phone models.

Option F

This option does not accommodate falling back to Cisco TFTP on error.

Correct Answer C,F
Explanation Explanation: Choosing the Right Distribution Method Which of the three different image-distribution methods discussed so far is the best for a customer deployment? Each method has advantages and disadvantages, and they are summarized in Table 1. Table 1. Summary of Distribution Models Peer Firmware Sharing Load Server Traditional TFTP Advantages Hierarchy is automatic One download per phone model on a subnet Uses TCP Fails back to TFTP Speeds up LAN upgrades Reduces TFTP CPU load during upgrade Has same download time as LAN image distribution Distributes TFTP load over multiple TFTP servers Proven distribution Default behavior Disadvantages Must be enabled on each phone Hierarchy is formed for each phone model Hierarchy is limited to subnet IP must be set on each phone Administrator must manually file copy to load server No failback to TFTP on error More prone to user error High-bandwidth requirements Multiple requests for same file High CPU usage on TFTP server Reference: http://www.cisco.com/en/US/prod/collateral/voicesw/ps6882/ps6884/white_paper_c11- 583891.pdf

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