The response message is 3XX for ().

The role of MP is to complete the interaction of control information with the conference TV terminal.

is a general multimedia communication control protocol, mainly for conference communication design, H.323 system using H.245 protocol as a control protocol, for the establishment, maintenance and release of control channels.

Video compression includes intra-frame compression (1 frame) and inter-frame compression (P frame), common H.26X, MPEG-2, MPEG-4 Both support in-frame/inter-frame compression.

A firewall protects a network from attacks by "untrusted" networks, but must also allow legitimate communication between the two networks. ( )