I

ICMP

See Internet Control Message Protocol.

IIS

See Internet Information Services.

IMC

See Internet Mail Connector.

inbound access

Ability to send information from an external network, such as the Internet, to an internal or external network. See also outbound access.

Integrated Services Digital Network (ISDN)

A dial-up connection to the Internet installed by your Internet service provider (ISP) or telephone company. An ISDN line can offer speeds up to 128,000 bits-per-second (bps) and must be installed at both the server site and the remote site.

interactive application

A program written in C, Perl, or as a Windows 2000 batch file. The user initiates the program by clicking a link in a hypertext document.

Internet Control Message Protocol (ICMP)

The Internet standard protocol subset of IP that handles control and error messages. Gateways use ICMP to send problem reports on packets back to the source that sent the packet.

Internet Information Services (IIS)

The Microsoft® Internet server feature designed for implementing and managing Web sites. Although IIS supports multiple protocols, it primarily transmits information in HTML pages by using HTTP. ISA integrates fully with IIS and Windows 2000 Server.

Internet Mail Connector (IMC)

A component of Microsoft Exchange Server that runs as a Windows 2000 Server service. You can use the Internet Mail Connector to exchange information with other systems that use the Simple Mail Transfer Protocol (SMTP).

Internet Protocol (IP)

The Internet standard routing protocol that defines the IP datagram as the unit of data transfer and provides the IP address scheme to route packets from one network location to another. IP includes the ICMP protocol. The Internet protocol suite is often called TCP/IP.

Internet Relay Chat (IRC)

An Internet standard protocol that supports interactive, real-time, text-based communications in established "chat rooms" on the Internet by means of IRC servers.

Internet Server Application Programming Interface (ISAPI)

A Microsoft-developed API for establishing procedural calls between Internet-based applications and the underlying operating system.

Internet Service Manager

The tool used with Internet Information Services (IIS) to administer services.

Internetwork Packet Exchange (IPX)

A routing protocol developed for Novell Netware networks that is used in place of IP to manage data transfer between computers. Windows NT and Windows 2000 implement IPX through NWLink.

IP

See Internet Protocol.

IP address

A unique address that identifies a computer on a network by using a 32-bit address that is unique across a TCP/IP network. An IP address is usually represented in dotted-decimal notation, which depicts an octet (8 bits, or 1 byte) of an IP address as its decimal value and separates each octet with a period; for example, 102.54.94.97.

IP forwarding

IP forwarding (IP routing) normally allows packets to be forwarded on the internal network.

IP packet filtering

Filtering that either allows or blocks packets destined to specific services on or behind the ISA computer.

IP packet filtering log

The log where IP packet filter events are recorded. The file is identified with PF as the first two letters in the log file name.

IPX/SPX

See Internetwork Packet Exchange (IPX), Sequenced Packet Exchange (SPX).

IRC

See Internet Relay Chat.

ISA Management

The interface tool used to manage ISA Server enterprise, arrays and standalone servers.

ISAPI

See Internet Server Application Programming Interface.

ISDN

See Integrated Services Digital Network.

ISDN interface card

Similar in function to a modem, an ISDN card is hardware that enables a computer to connect to other computers and networks on an Integrated Services Digital Network (ISDN).

IUSR_computername

A default account with anonymous logon privileges for accessing Internet-based services such as FTP, WWW, and Gopher. This account is created during the installation of Internet Information Services (IIS).