Chat with AIExam 11: Voice and Video Over IP
Explain how gateways on a converged network exchange and translate signaling and control information with each other so that voice and video packets are properly routed through the network.
(35) 
VerifiedGateways rely on an intermediate device known as an MGC (media gateway controller).As its name implies,an MGC is a computer that manages multiple media gateways.This means that it facilitates the exchange of call signaling information between these gateways.It also manages and disseminates information about the paths that voice or video signals take between gateways.
Describe five capabilities to which SIP is limited.
(32) VerifiedSIP's capabilities are limited to the following:
·Determining the location of an endpoint,which in SIP terminology refers to any client,server,or gateway communicating on a network; this means SIP translates the endpoint's name into its current network address
·Determining the availability of an endpoint; if SIP discovers that a client is not available,it returns a message indicating whether the client was already connected to a call or simply didn't respond
·Establishing a session between two endpoints and managing calls by adding (inviting),dropping,or transferring participants
·Negotiating features of a call or videoconference when it's established - for example,agreeing on the type of encoding both endpoints will employ
·Changing features of a call or videoconference while it's connected
MATCHING
Match each item with a statement below:
a.H.323 terminal
f.H.225
b.H.323 gateway
g.H.245
c.H.323 gatekeeper
h.RTP
d.MCU (multipoint control unit)
i.RSVP
e.H.323 zone
-The nerve center for networks that adhere to H.323.
(37) VerifiedC
MATCHING
Match each item with a statement below:
a.H.323 terminal
f.H.225
b.H.323 gateway
g.H.245
c.H.323 gatekeeper
h.RTP
d.MCU (multipoint control unit)
i.RSVP
e.H.323 zone
-The H.323 protocol that handles call or videoconference signaling.
(35) ____ messaging is a service that makes several forms of communication available from a single user interface.
(38) Among all video-over-IP applications,____ is perhaps the simplest.
(31) ____ is the use of one network to simultaneously carry voice,video,and data communications.
(40) ____________________ performs the same functions as MGCP,but using different commands and processes.
(32) ______________________________ is a QoS technique that replaces the IP datagram header with a label at the first router a data stream encounters.
(35) Many streaming video services - and nearly all of those issued over a public network,such as the Internet - are examples of ____ transmissions.
(35) ____ is a measure of how well a network service matches its expected performance.
(36) When streaming videos are supplied via the Web,they are often called ____________________.
(38) ____ describes the use of any network to carry voice signals using the TCP/IP protocol.
(32) SIP and H.323 regulate ____ for VoIP or video-over-IP clients and servers.
(32) Using VoIP over a WAN allows an organization to avoid paying long-distance telephone charges,a benefit known as ____.
(38) MATCHING
Match each item with a statement below:
a.H.323 terminal
f.H.225
b.H.323 gateway
g.H.245
c.H.323 gatekeeper
h.RTP
d.MCU (multipoint control unit)
i.RSVP
e.H.323 zone
-A computer that provides support for multiple H.323 terminals and manages communication between them.
(34) MATCHING
Match each item with a statement below:
a.H.323 terminal
f.H.225
b.H.323 gateway
g.H.245
c.H.323 gatekeeper
h.RTP
d.MCU (multipoint control unit)
i.RSVP
e.H.323 zone
-Attempts to reserve a specific amount of network resources for a transmission before the transmission occurs.
(34) A(n)____ is a computer that manages multiple media gateways.
(33) 
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