Exam 12: Voice and Video Over IP

When more than two people participate in a videoconference, for example, in a point-to-multipoint or multipoint-to-multipoint scenario, a video ____ is required.

Describe IP telephones and how they are connected to a network.

Describe the RTCP (Real-time Transport Control Protocol), as defined in RFC 3550 by the IETF.

Describe five capabilities to which SIP is limited.

When streaming videos are supplied via the Web, they are often called ____________________.

Explain why UDP is preferred over TCP for real-time applications such as telephone conversations and videoconferences.

In general, a(n) ____ is a private switch that accepts and interprets both analog and digital voice signals.

____ describes the use of any network to carry voice signals using the TCP/IP protocol.

____________________ is a simple technique that addresses QoS issues by prioritizing traffic.

All VoIP calls are carried over the Internet.

When a caller uses an IP telephone, his or her voice is immediately digitized and issued from the telephone to the network in ____ form.

Some VoIP vendors prefer ____________________ over H.323.

Many network engineers consider ____ to be superior to MGCP.

Using VoIP over a WAN allows an organization to avoid paying long-distance telephone charges, a benefit known as ____.

Explain why MGCs are especially advantageous on large VoIP networks.

Aside from extreme mobility, describe another advantage to softphones.

____________________ is a QoS technique that replaces the IP datagram header with a label at the first router a data stream encounters.

____________________ performs the same functions as MGCP, but using different commands and processes.

A(n) ____ is a computer that manages multiple media gateways.