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Chapter 11: Voice and Video Over IP
Network+
18
Computer Networking
Undergraduate 4
05/01/2012

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Term
Soft phone
Definition
Skype, the popular Internet telephony service, provides a user with what type of interface?
Term
Convergence
Definition
___ is the use of one network to simultaneously carry voice, video, and data communications.
Term
Packet
Definition
When a caller uses an IP telephone, his or her voice is immediately digitized and issued from the telephone to the network in ___ form.
Term
Application
Definition
At what layer of the OSI model does RTP operate?
Term
SIP supports a wider range of voice & video codecs.
SIP messages use fewer processing resources.
Definition
Which of the following is a reason for choosing SIP over H.323?
Term
SIP
Definition
___ signaling functions are more limited than those performed by the protocols in the H.323 group.
Term
Registrar server
Definition
In SIP, which of the following network elements maintains a database with network address information for every SIP client?
Term
Toll bypass
Definition
Using VoIP over a WAN allows an organization to avoid paying long-distance telephone changes, a benefit known as ___.
Term
Toll bypass
Definition
A company’s use of VoIP on its WAN to avoid long distance telephone charges is known as:
Term
ATA
Definition
You have decided to establish a VoIP system in your home. Which of the following devices is necessary to connect your analog telephone to your VoIP server?
Term
ATA
Definition
When using an analog telephone, a VoIP adapter that performs analog-to-digital conversion is known as a(n) ___.
ATA
Term
IP-PBX
Definition
In general, a(n) ___ is a private switch that accepts and interprets both analog and digitals voice signals.
Term
Streaming video
Definition
Watching a YouTube video on the Web is an example of which of the following types of video-over-IP services?
Term
Streaming video
Definition
Among all video-over-IP applications, ___ is perhaps the simplest.
Term
Internet telephony
Definition
When VoIP relies on the Internet, it is often called ___.
Term
QoS
Definition
___ is a measure of how well a network service matches its expected performance.
Term
It established a path between the server and receiver that is guaranteed to supply sufficient bandwidth for the transmission.
Definition
How does RSVP help improve QoS?
Term
Report on the degree of packet loss and delay in a connection
Definition
What can RTCP do that RTP cannot?
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