CertiGuide to Network+  9  Glossary

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Internet Protocol security (IPSec)

A set of industry-standard, cryptography-based protection services and protocols. IPSec protects all protocols in the TCP/IP protocol suite and Internet communications using L2TP.

A company that provides individuals or companies access to the Internet and the World Wide Web. An ISP provides a telephone number, a user name, a password, and other connection information so users can connect their computers to the ISP’s computers. An ISP typically charges a monthly and/or hourly connection fee.

A network that is composed of two or more smaller networks. The Internet is considered the mother of all internetworks.

A network protocol suite native to NetWare that controls addressing and routing of packets within and between LANs.

A request for attention from the processor. When the processor receives an interrupt, it suspends its current operations, saves the status of its work, and transfers control to a special routine known as an interrupt handler, which contains the instructions for dealing with the particular situation that caused the interrupt.

A signal sent by a device to get the attention of the processor when the device is ready to accept or send information. Each device sends its interrupt requests over a specific hardware line, numbered from 0 to 15. Each device must be assigned a unique IRQ number.

A network within an organization that uses Internet technologies and protocols but is available only to certain people, such as employees of a company. An intranet is also called a private network.

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