Frame Definition/Meaning:
1. A single message or packet on a data link using a
data link control
protocol such as HDLC, ADCCP, etc. The frame is the unit of error detection,
retransmission, etc. A special pattern of bits
- a flag - marks the beginning and ending of the frame. In the HDLC protocol, a
flag is the 8-bit sequence
01111110
that when followed by any sequence of bits other than another flag denotes the
beginning of a frame of data; the flag is maintained as a unique synchronizing
sequence of bits since the rules of the protocol require that a 0 is
automatically inserted by the sending equipment whenever it detects the presence
of five 1s in the input data stream.
2. In general, a complete or self-identifying message in a data communication
system.
3. A section of a recording on magnetic tape that comprises a single bit in each
track.
|
