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

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

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?

Answers

Explanations

A. B. C. D. E.

D.