ZyXEL FSG2200HNU User Guide - Page 105
Network Names, Multiple SSIDs, Radio Channels, Wireless LAN, FSG2200HNU User's Guide
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Chapter 7 Wireless LAN • An access point is a radio with a wired connection to a network, which can connect with numerous wireless clients and let them access the network. • A bridge is a radio that relays communications between access points and wireless clients, extending a network's range. Traditionally, a wireless network operates in one of two ways. • An "infrastructure" type of network has one or more access points and one or more wireless clients. The wireless clients connect to the access points. • An "ad-hoc" type of network is one in which there is no access point. Wireless clients connect to one another in order to exchange information. Network Names Each network must have a name, referred to as the SSID - "Service Set IDentifier". The "service set" is the network, so the "service set identifier" is the network's name. This helps you identify your wireless network when wireless networks' coverage areas overlap and you have a variety of networks to choose from. Multiple SSIDs Traditionally, you needed to use different access points (APs) to configure different SSIDs. As well as the cost of buying extra APs, there is also the possibility of channel interference. The ZyXEL Device's Multiple SSID function allows you to use one AP to provide several SSIDs simultaneously. You can then assign varying levels of privilege to different SSIDs. Wireless stations can use different SSIDs to associate with the same AP. The following are some notes on multiple SSIDs. • A maximum of four SSIDs can be used simultaneously. • You must use different WEP keys for different BSSs. If two stations have different SSIDs, but have the same WEP keys, they may hear each other's communications (but not communicate with each other). Radio Channels In the radio spectrum, there are certain frequency bands allocated for unlicensed, civilian use. For the purposes of wireless networking, these bands are divided into numerous channels. This allows a variety of networks to exist in the same place without interfering with one another. When you create a network, you must select a channel to use. Since the available unlicensed spectrum varies from one country to another, the number of available channels also varies. FSG2200HNU User's Guide 105