Question 373 of 490 from exam 400-051: CCIE Collaboration

Question 373 of 490 from exam 400-051: CCIE Collaboration

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Question

Refer to the exhibit.

INVITE sip:951241822220172.16.100.90:5060 SIP/2.0 Via: SIP/2.0/TCP 172.16.100.50:5060 From: “Agent A" <sip:51241830010172.16.100.50> To: <sip:951241822220172.16.100.90> Date: Tue, 10 Mar 2015 14:25:03 GMT Call-ID: 3c748f00-4felfebr-35ff9-2bef1l2ac0172.16.100.50 Allow: INVITE, OPTIONS, INFO, BYE, CANCEL, ACK, PRACK, UPDATE Cisco-Guid: 1014271744-0000065536-0000221138-0737068172 Content Type: application/sdp Content-Length: 202 v=0 o=CiscoSystemsCCM-SIP 2371 1 IN IP4 172.16.100.50 s=SIP Call c=IN IP4 172.16.100.50 t=0 0 m=audio 24582 RIP/AVP 0 4 8 9 18 101 a=rtpmap:0 PCMU/8000 a=rtpmap:4 G72378000 a=rtpmap:8 PCMA/8000 a=rtpmap:9 G72278000 a=rtpmap:18 G729/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-15

Which SIP message will trigger the calling device to open channels for early media reception?

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A. B. C. D. E.

D.

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