Answer Posted / mahesh
Link Access Procedure, Balanced (LAPB) is a data link
layer protocol used to manage communication and packet
framing between data terminal equipment (DTE) and the data
circuit-terminating equipment (DCE) devices in the X.25
protocol stack. LAPB, a bit-oriented protocol derived from
HDLC, LAPB makes sure that frames are error free and
properly sequenced.
LAPB cause trmoundes amount of overhead becoz of its
strict timeout and windowing techniques.
it is a connection-oriented protocol.
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