A broadband, multi-element, unidirectional, narrow-beam antenna that has impedance and radiation characteristics that are regularly repetitive as a logarithmic function of the excitation frequency.
Note: The length and spacing of the elements of a log-periodic antenna increase logarithmically from one end to the other. Synonym log-periodic array.

Synonym log-periodic antenna.

1. Malicious logic that causes damage to a data processing system when triggered by some specific system condition. [2382-pt.8]
2. [A] resident computer program triggering an unauthorized act when particular states of an information system (IS) are realized. [INFOSEC-99]

Synonym virtual circuit.

In a local-area-network/metropolitan-area-network (LAN/MAN) system, the part of the link level that (a) supports medium-independent data link functions and (b) uses the services of the medium access control sublayer to provide services to the network layer.

Synonym virtual circuit.

A logical channel that provides a signaling path within an information channel or within a physical signaling channel.

Of a network, the schematic configuration that reflects the network's function, use, or implementation without regard to the physical interconnection of network elements.

The procedure that is followed by a user in beginning a session, e.g., a period of terminal operation. Synonym logon.

Synonym login.