Agilent Technologies J3916A manual Half-duplex, Hdlc High Level Data Link Control, Header

Glossary

Half-duplex

A form of communication where information can only travel one direction at a time. See also Full-duplex.

HDLC (High Level Data Link Control)

Level 2 link protocol developed by ISO (International Standards Organization). Transmissions are frame oriented; starting flag, address field, control field, optional information field, frame check sequence, and trailing flag. Some specialized derivatives of HDLC give broader definition to the address field, and some omit the control field. HDLC is the most general definition of the bit oriented link protocols. See also SDLC.

Header

Information at the beginning of a cell, frame or packet normally used for alignment, routing, operations or similar purposes.

I-frame

Information frame (level 2) used to carry user data.

IEEE 802.3 standard

Part of the Institute of Electrical and Electronics Engineers 802 family of LAN standards. The 802.3 standard defines the physical layer (layer 1) and part of the data link layer (layer 2) of the ISO OSI reference model for a CSMA/CD LAN. The IEEE 802.3 standard evolved from Ethernet, but the two networks are not fully compatible with each other.

IEEE 802.5 Standard

Part of the Institute of Electrical and Electronics Engineers 802 family of LAN standards. The 802.5 standard defines the physical layer (layer 1) and part of the data link layer (layer 2) of the ISO OSI reference model for a Token-Ring LAN.

IP Address (Internet Protocol Address)

A32-bit address that is divided into network-identifier and host-identifier fields, which are used to identify a particular physical network or a particular device attached to that physical network (respectively).

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