Canon 802.11g 54M WLAN 사용자 설명서

configuration. Infrastructure is applicable to enterprise scale for wireless access to central 

database, or wireless application for mobile workers.   

Local Area Networking (LAN) is the term used when connecting several computers 

together over a small area such as a building or group of buildings. LAN’s can be 

connected over large areas. A collection of LAN’s connected over a large area is called a 

Wide Area Network (WAN). A LAN consists of multiple computers connected to each other. 

There are many types of media that can connect computers together. The most common 

media is CAT.5 cable (UTP or STP twisted pair wire.) On the other hand, wireless networks 

do not use wires; instead they communicate over radio waves. Each computer must have a 

Network Interface Card (NIC), which communicates the data between computers. A NIC is 

usually a 10Mbps network card, or 10/100Mbps network card, or a wireless network card. 

Most networks use hardware devices such as hubs or switches that each cable can be 

connected to in order to continue the connection between computers. A hub   

 

simply takes any data arriving through each port and forwards the data to all other ports. A 

switch is more sophisticated, in that a switch can determine the destination port for a 

specific piece of data.    A switch minimizes network traffic overhead and speeds up the 

communication over a network. 

For a computer to communicate with other computers on the Internet, it must have an IP 

address. An IP (Internet Protocol) address is a unique 32-bit number that identifies the 

location of your computer on a network. However, with the explosion of the Internet, the 

number of available IP addresses is simply not enough. 

This is where NAT comes to the rescue. Network Address Translation allows a single 

device, such as a router, to act as an agent between the Internet (or “public network”) and a 

local (or “private”) network. This means that only a single, unique IP address is required to 

represent an entire group of computers. 

The ability to use a wireless device is able to move from one access point range to another 

without losing the connection. 

It should remain at its default setting of 2,347. A preamble is a signal used to synchronize 

the transmission timing between two or more systems. A series of transmission pulses is 

sent before the data to indicate that someone is about transmit data. This ensures that 

systems receiving the information correctly when the data transmission starts.