2013 Latest CCIE Voice Written 350-030 Exam 16-20

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QUESTION 16
Which three of these are mandatory sub-commands of the call-manager-fallback command and will help an IP phone register to an IOS router in SRST mode? (Choose three.)
A. access-code
B. dialplan-pattern
C. ip source-address
D. keepalive
E. max-dn
F. max-ephones
Correct Answer: CEF

QUESTION 17
Refer to the exhibit.
You are debugging a problem on a SIP network and have run the debug ccsip messages command. One of the messages returned is shown in the exhibit. What information will the server return to the caller?
A. the acceptable media type
B. a list of acceptable media types
C. a list of acceptable formats
D. a correct directory number
E. an acceptable language code
Correct Answer: C

QUESTION 18
Which type of SIP responses would indicate that a server encountered an error in attempting to complete a SIP request?
A. 1xx
B. 3xx
C. 4xx
D. 5xx
E. 6xx
Correct Answer: D

QUESTION 19
To hide its identity when initiating calls, SIP Phone B requests that Server B place its calls for it.
What kind of device is Server B?
A. proxy
B. redirect
C. registrar
D. user agent client
E. user agent server
Correct Answer: A

QUESTION 20
Which of the following three messages could be sent by the UAC in response to the 180 Ringing? (Choose three.)
A. PRACK
B. ACK
C. BYE
D. CANCEL
E. INVITE
Correct Answer: ABD

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