H
- half duplex
The capacity to transfer data in only one direction at a time between a sending unit and receiving unit. See also: full duplex.
- handshake
Any series of transmissions exchanged between two or more devices on a network to ensure synchronized operations.
- H channel
High-speed channel: A full-duplex, ISDN primary rate channel operating at a speed of 384 Kbps. See also: B channel, D channel, and E channel.
- HDLC
High-Level Data Link Control: Using frame characters, including checksums, HDLC designates a method for data encapsulation on synchronous serial links and is the default encapsulation for Cisco routers. HDLC is a bit-oriented synchronous Data Link layer protocol created by ISO and derived from SDLC. However, most HDLC vendor ...
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