READ Free Dumps For Cisco- 400-051
| Question ID 12899 | Which H.245 information is exchanged within H.225 messages in H.323 Fast Connect?
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| Option A | Terminal Capability Set
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| Option B | Open Logical Channel
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| Option C | Master-Slave Determination
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| Option D | Call Setup
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| Option E | Call Progress
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| Correct Answer | B |
Explanation Explanation: With the standard H.245 negotiation, the two endpoints need three round-trips before they agree on the parameters of the audio/video channels (1. master/slave voting, 2. terminal capability set exchange, and finally, 3. opening the logical channels). In certain situations and especially with high-latency network links, this can last too long and users will notice the delay.
| Question ID 12900 | Refer to the exhibit.
Which SIP message header is used to tunnel QSIG messages across the SIP network
when the OGW receives a call bound for the TGW?
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| Option A | Content-TypE. application/sdp
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| Option B | Content-TypE. application/qsig
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| Option C | Content-TypE. message/ISUP
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| Option D | Content-TypE. message/external-body
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| Option E | Content-TypE. application/x-q931
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| Correct Answer | B |
Explanation Explanation: Tunneling over SIP The Cisco gateway receives QSIG messages from the PBX side and then identifies the destination of the message (or call). The QSIG messages received from the PBX are encapsulated within SIP messages as Multipurpose Internet Mail Extensions (MIME) bodies and are sent (tunneled) across the IP network to the recipient gateway. When encapsulating a QSIG message (for switch type primary-qsig) inside a SIP message, Cisco gateways include the QSIG message in a MIME body of the SIP request or response using media type ✑ application/QSIG: ✑ Content-Type: application/QSIG Reference: http://www.cisco.com/c/en/us/solutions/collateral/enterprise-networks/empowered-branch- solution/white_paper_c11_459092.html