Short for IP Security, a set of protocols developed by the IETF to support secure exchange of packets at the IP layer. IPsec has been deployed widely to implement Virtual Private Networks (VPNs).
IPsec supports two encryption modes: Transport and Tunnel. Transport mode encrypts only the data portion (payload) of each packet, but leaves the header untouched. The more secure Tunnel mode encrypts both the header and the payload. On the receiving side, an IPSec-compliant device decrypts each packet.
For IPsec to work, the sending and receiving devices must share a public key. This is accomplished through a protocol known as Internet Security Association and Key Management Protocol/Oakley (ISAKMP/Oakley), which allows the receiver to obtain a public key and authenticate the sender using digital certificates.
Acronym for International Roaming Access Protocols. The International Roaming Access Protocols (IRAP) is a selection of methods for constructing wireless infrastructures. * This is a set of proven, standards-based interfaces that establish a common baseline of features to facilitate seamless network interoperability. IRAP is an open framework, or profiles of a set of core protocols, […]
Short for Internet Relay Chat, a chat system developed by Jarkko Oikarinen in Finland in the late 1980s. IRC has become very popular as more people get connected to the Internetbecause it enables people connected anywhere on the Internet to join in live discussions. Unlike older chat systems, IRC is not limited to just two […]
Short for interrecord gap, the space between two consecutive physical blocks on a data recording medium, such as a hard drive or a magnetic tape. IRGs are used as markers for the end of data and also as safety margins for data overwrites. An interrecord gap is also referred to as a interblock gap.
- IRMA board
A popular expansion board for PCs and Macintoshes that enables these personal computers to emulate IBM 3278 and 3279 mainframe terminals. In other words, personal computers with IRMA boards can function as both stand-alone computers and as terminals connected to a mainframe computer. IRMA boards are made by a company called DCA.
In Microsoft operating systems including Windows NT, Windows 2000 Server, Windows XP and Windows Server 2003, the IRPStackSize is a parameter that specifies the number of stack locations in I/O request packets (IRPs) that are used by the operating system. Each stack uses 36 bytes of memory for each receive buffer and you can increase […]