Question
a.
X.25 protocol as LAPB (Link Access Procedure Balanced), V.42 protocol as LAPM (Link Access Procedure for Modems)
b.
Frame Relay protocol as LAPF (Link Access Procedure for Frame Relay)
c.
ISDN (Integrated Services Digital Network)protocol as LAPD (Link Access Procedure on D-channel)
d.
All of the above
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Q. Which protocols adopted the standards of HDLC (High-Level Link Control) protocol?
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