The second form is often called datagram traffic. Similarly TCP will first connect to a remote host by sending one or more packets, then transfer data, then terminate the connection. This complicates delivering video, voice. A protocol is usually specified as a set of layers with well defined interfaces. Frame is simply a sequence of bits transmitted on a wire or over a wireless medium.
Special method is used to delineate frame boundaries.
Some frame types are Ethernet frames and FDDI frames. It is the data field of a frame. A message is arbitrarily long It is broken into fixed sized packets by the Transport Layer for delivery by the Network Layer. Last modified on 4 February 1998.