A pad composed of two discrete components, one series component and one shunt component. Note: In schematic representation, the components resemble the upper-case letter “L,” hence the name.

Layer 2 Tunneling Protocol

An identifier within or attached to a set of data elements. 2. One or more characters that (a) are within or attached to a set of data elements and (b) represent information about the set, including its identification. 3. In communications, information within a message that is used to identify specific system parameters, such as the particular circuit with which the message is associated. Note: Messages that do not relate to call control should not contain a label. 4. In programming languages, an identifier that names a statement. 5. An identifier that indicates the sensitivity of the attached information. 6. For classified information, an identifier that indicates (a) the security level of the attached information or (b) the specific category in which the attached information belongs. 7. A field within a signaling message that contains information used to identify the circuit, call, or management transaction to which the message is related. [T1.226-1992]

A computer or server that supplies content labels or Web-site ratings. Synonym rating server. [Bahorsky]

In integrated services digital networks, (ISDN), a time-ordered set of all block payloads that have labels containing the same information, i.e., containing the same identifiers.

In integrated services digital networks (ISDN), an interface structure that provides telecommunications services and signaling by means of labeled channels.

In integrated services digital networks (ISDN), multiplexing by concatenation of the blocks of the channels that have different identifiers in their labels.

In integrated services digital networks (ISDN), a labeled channel in which the block payloads or the duration of each successive block is random.

Use of sophisticated signal recovery equipment in a laboratory environment to recover information from data storage media. [INFOSEC-99]

Lawfully Authorized Electronic Surveillance