Abbreviation for Internet relay chat. A service for conducting a chat on the Internet, i.e., an application that allows a number of individual users to exchange text messages simultaneously in real time over The Internet.

Radiant power incident per unit area upon a surface.
Note: Irradiance is usually expressed in watts per square meter, but may also be expressed in joules per square meter. Deprecated synonym power density.

The product of irradiance and time, i.e., the time integral of irradiance.
Note: For example, an irradiation of 100 J/m2 (joules per square meter) is obtained when an irradiance of 25 W/m2 (watts per square meter) is continuously incident for 4 seconds.

Encryption that produces ciphertext from which the original data cannot be reproduced.
Note: Irreversible encryption is useful in authentication. For example, a password might be irreversibly encrypted and the resulting ciphertext stored. A password presented later would be irreversibly encrypted identically and the two strings of ciphertext compared. If they are identical, the presented password is correct. Synonyms irreversible encipherment,… (Read More →)

Abbreviation for Internet Research Task Force. A task force of the Internet Architecture Board (IAB), and which is responsible for research and development of the Internet protocol suite.

Intra-Site Automatic Tunnel Addressing Protocol

Abbreviation for independent sideband. See independent-sideband transmission.

IMS Service Control

Integrated Services Digital Network

The functional part of the Signaling System No.7 (SS7) protocol, i.e., the part that specifies the interexchange signaling procedures for the set up and tear down of trunk calls between networks. The ISDN User Part is one of the specified users of the Message Transfer Part (MTP) transport capability of the SS7 interconnections. The user part identification is encoded in… (Read More →)