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LAP

(1) (Link Access Protocol) The data link protocol in an AppleTalk network. Support for the various data link types were known as ELAP (Ethernet LAP), TLAP (Token Ring LAP), FLAP (FDDI LAP) and LLAP (LocalTalk LAP).

(2) (Link Access Procedure) An ITU family of data link protocols that are subsets of HDLC, which was derived from IBM's SDLC protocol. See HDLC.

LAP-B (LAP - Balanced)
Used in X.25 networks. Multilink Procedure (MLP) is a LAP-B extension that supports multiple, simultaneous links for increased throughput.

LAP-D (LAP for the D Channel)
Used for the D channel in ISDN networks defined in the ITU Q.920 and Q.921 recommendations. See ISDN.

LAP-M (LAP for Modems)
Used in V.42 modems. Although transmission between computer and modem is asynchronous, transmission between LAP-M modems is synchronous. See V.42.

LAP-X (LAP Half-Duplex)
Used in ship-to-shore transmission.



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