The assigning of buffer storage for the duration of the execution of a computer program.

See SMTP.

The Transmission Control Protocol/Internet Protocol (TCP/IP) standard protocol that (a) is used to manage and control IP gateways and the networks to which they are attached, (b) uses IP directly, bypassing the masking effects of TCP error correction, (c) has direct access to IP datagrams on a network that may be operating abnormally, thus requiring management, (d) defines a set… (Read More →)

In facsimile transmission, scanning using only one spot at a time.

A Bell-LaPadula security model rule allowing a subject read access to an object only if the security level of the subject dominates the security level of the object [TCSEC].

[The] Bell-La Padula security model rule allowing a subject read access to an object, only if the security level of the subject dominates the security level of the object. [INFOSEC-99]

Signaling in which two conductors are used for a single channel, and a center-tapped coil, or its equivalent, is used to split the signaling current equally between the two conductors.
Note: SX signaling may be one-way, for intra-central-office use, or the simplex legs may be connected to form full duplex signaling circuits that function like composite (CX) signaling circuits with… (Read More →)

1. A circuit that provides transmission in one direction only.
2. Deprecated definition: A circuit using ground return and affording communication in either direction, but in only one direction at a time.
Note: The above two definitions are contradictory; however, both are in common use. The user is cautioned to verify the nature of the service specified by this term.

1. Operation in which transmission occurs in one and only one preassigned direction. Synonym one-way operation.
Note: Duplex operation may be achieved by simplex operation of two or more simplex circuits or channels.
2. Operating method in which transmission is made possible alternately in each direction of a telecommunication channel, for example by means of manual control.
Note: In general,… (Read More →)

A communications protocol that is purely one-way, and where acknowledgments are not part of any application protocol. Error control is either not provided, or is accomplished via forward error correction. [T1.80
0. 08-1995]