Fujitsu Lifebook T731 User Manual download pdf (Page 156)

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- Glossary

Infrastructure

A name of a wireless LAN configuration. This type of communication uses an access point. Another

type of communication is called Ad Hoc.

IP Address

An identifier for a computer or device on a TCP/IP network. Networks using the TCP/IP protocol

route messages based on the IP address of the destination. The format of an IP address is a 32-bit

numeric address written as four numbers separated by periods. Each number can be zero to 255. For

example, 1.160.10.240 could be an IP address.

Within an isolated network, you can assign IP addresses at random as long as each one is unique.

However, connecting a private network to the Internet requires using registered IP addresses (called

Internet addresses) to avoid duplicates.

The four numbers in an IP address are used in different ways to identify a particular network and a

host on that network. Three regional Internet registries -- ARIN, RIPE NCC and APNIC -- assign

Internet addresses from the following three classes.

Class A - supports 16 million hosts on each of 126 networks

Class B - supports 65,000 hosts on each of 16,000 networks

Class C - supports 254 hosts on each of 2 million networks

The number of unassigned Internet addresses is running out, so a new classless scheme called CIDR

is gradually replacing the system based on classes A, B, and C and is tied to adoption of IPv6.

An abbreviation for infrared.

IrDA

Infrared Data Association. An organization which produces standards for communication using

infrared as the carrier.

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