A component which allows the transfer of information from one system to another, whilst providing a high level of confidence that information flow in the reverse direction is prevented [CESG].
Note: Used where the security class of the receiving system dominates that of the sender.

Synonym half-duplex operation.

A trunk between two switching centers, over which traffic may be originated from one preassigned location only.
Note 1: The traffic may consist of two-way communications; the expression "one way" refers only to the origin of the demand for a connection.
Note 2: At the originating end, the one-way trunk is known as an "outgoing trunk"; at the other end,… (Read More →)

A channel capable of transmission in only one direction, which cannot be reversed. Synonym unidirectional channel.

A computer system that is a part of, or is embedded in, a larger entity, such as a communications system, and that interacts in real or near-real time with the entity and its users.

A process in which images or listings of goods and services are viewed remotely via electronic means, e.g., a vendor's Web site, items are selected for purchase, and the transaction is completed electronically with a credit card or an established credit account.
Note: Various encryption schemes may be, and usually are, used to reduce the risks of sending sensitive information,… (Read More →)

In computer networking, a software modification or installation performed remotely from an originating site (e.g., by authority of a network administrator) on a subject user's computer, by means of a special utility program that enables access to the subject computer whenever it is powered up and on line.
Note: An online software upgrade may be performed (a) automatically, without the… (Read More →)

Old Network Service Provider

Optical Network Terminal

Optical Network Unit