400-051 PDF Download
Test Information:
Total Questions: 378
Test Number: 400-051
Vendor Name: Cisco
Cert Name : CCIE
Test Name: CCIE Collaboration Written
Official Site:http://www.examsboost.com
For More Details: http://www.examsboost.com/test/400-051/Version: 19.0
Question: 1
Which two statements about using the Load Server option for IP phone firmware distribution are true? (Choose two.)
A. This option must be enabled on at least two servers in a Cisco Unified Communications Manager cluster.
B. This option must be enabled on Cisco Unified Communications Manager service parameters for Cisco TFTP.
C. Phone firmware must be manually copied to any applicable load servers.
D. The load server will not function if its IP address is not in the same subnet as the IP phones.
E. This option is only available for newer IP phone models.
F. This option does not accommodate falling back to Cisco TFTP on error.
Answer: C, F
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 |
TraditionalTFTP |
|
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 •Defaultbehavior |
|
Disadvantages |
• Must be enabled on each phone • Hierarchy is formed for each phone model • Hierarchy is limited to subnet |
•IPmustbesetoneachphone •Administratormustmanuallyfilecopytoloadserver •NofailbacktoTFTPonerror • More prone to user error |
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