Exam 300-815 topic 1 question 6 discussion

Actual exam question from Cisco's 300-815

Question #: 6
Topic #: 1

End users at a new site report being unable to hear the remote party when calling or being called by users at headquarters. Calls to and from the PSTN work as expected. To investigate the SIP signaling to troubleshoot the problem, which field can provide a hint for troubleshooting?

A. Contact: header of the 200 OK response
B. Allow: header if the 200 OK response
C. o= line of SDP content
D. c= line of SDP content

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Suggested Answer: D 🗳️

by AKREM86 at Jan. 7, 2021, 5:51 p.m.

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AKREM86

Highly Voted 3 years, 4 months ago

Correct Answer D. c= attributes contained the connection media information. It contains the IP address that will be used for RTP. https://tools.ietf.org/html/rfc4566#section-5.7

upvoted 5 times

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jatoja83

Most Recent 2 months, 1 week ago

Selected Answer: D

The C Field <c=> indicates the IP address where the media RTP should be sent to by the other end.

upvoted 1 times

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Afaik

9 months, 1 week ago

Selected Answer: D

There are two attributes required for each side to negotiate the RTP stream in SDP and this information is passed on the c= for IP and m= for Port and Codec(s).

upvoted 2 times

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enashash

2 years, 11 months ago

D C=connection information while o=originator and session identifier

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juanmacipag

3 years, 1 month ago

Correct Answer D. c= (Connection/IP address for RTP stream) Reference: SDP Parameter