Answer / 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.

Answer / victor

Link Access Procedure Balanced(LAPB) is a data link layer
protocol which
is used for communicating and packet framing
between DTE and DCE
devices. It is a bit oriented protocol which is
used to check whether the
frames are ordered and to check if there is any error.

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