2013 Latest CCIE Voice Written 350-030 Exam 91-95

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QUESTION 91
Which statement about the offer/answer model of SDP is correct?
A. Offer/answer cannot be considered complete when it happens in an INVITE/18x exchange.
B. PRACK message must not carry SDP, or else offer/answer will not work.
C. Offer must be included in the initial INVITE; otherwise, offer/answer cannot complete.
D. It is best to start a call without an offer and wait for an answer.
E. ACK message can carry the SDP answer.
Correct Answer: E

QUESTION 92
Which two mechanisms can be used to detect SIP calls that are hung or stuck in an incomplete state? (Choose two.)
A. SDP time stamps and version number
B. PRACK (RSeq)
C. session timer
D. periodic hold/resume
E. OOD Refer
F. RTP and RTCP inactivity monitoring
Correct Answer: CF

QUESTION 93
Which statement correctly describes symmetric signaling in SIP?
A. SIP devices use the same listening port for all incoming SIP messages.
B. SIP devices send and receive SIP messages at the same time.
C. SIP devices send SIP traffic to the same IP address and port number of an upstream element.
D. SIP devices use the same source port for SIP messages.
E. SIP devices use the same port number for sending and receiving SIP messages.
Correct Answer: E

QUESTION 94
Refer to the exhibit.
The line that is shown in the exhibit appeared in the Cisco Unified Communications Manager trace for a SIP IP phone that deregisters frequently. What could be the reason for deregistration?
A. The phone was reset from the Cisco Unified Communications Manager Administration web page.
B. The phone lost power momentarily and rebooted itself.
C. Cisco Unified Communications Manager reset the TCP connection to the phone.
D. The phone was restarted from the Cisco Unified Communications Manager Administration web page.
E. The phone aborted the TCP connection.
Correct Answer: B

QUESTION 95
Which statement about the “Unknown Caller ID” service parameter in Cisco Unified Communications Manager configuration is true?
A. This parameter defines a numeric string to be displayed to the called party on inbound calls that arrived with no caller ID information.
B. This parameter designates a numeric string to be displayed to the called party for outbound calls without caller ID information.
C. This parameter defines a numeric or a text string to be displayed to the called party for inbound calls that arrived with no caller ID information.
D. This parameter designates a numeric or a text string to be displayed to the called party for outbound calls without caller ID information.
E. This parameter defines a numeric string to be displayed to the called party on inbound and outbound calls with no caller ID information.
Correct Answer: A

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