ZyXEL ZyAIR G-470 User Manual download pdf (Page 56)

G-470 User’s Guide

56 Chapter 6 Wireless Screens

6.1.2 ESS

An Extended Service Set (ESS) consists of a series of overlapping BSSs, each containing an

access point, with each access point connected together by a wired network. This wired

connection between APs is called a Distribution System (DS). An ESSID (ESS IDentification)

uniquely identifies each ESS. All access points and their associated wireless stations within

the same ESS must have the same ESSID in order to communicate.

Figure 27 Extended Service Set

6.2 Wireless LAN Basics

This section describes the wireless LAN network terms.

6.2.1 Channel

A channel is the radio frequency or frequencies used by IEEE 802.11b wireless devices.

Channels available depend on your geographical area. You may have a choice of channels (for

your region) so you should use a different channel from an adjacent AP (access point) to

reduce interference. Interference occurs when radio signals from different access points

overlap, causing signal disruption and degrading performance.

Adjacent channels partially overlap, however. To avoid interference due to overlap, your AP

should be on a channel at least five channels away from a channel that an adjacent AP is using.

For example, if your region has 11 channels and an adjacent AP is using channel 1, then you

need to select a channel between 6 or 11.

1 2 ... 51 52 53 54 55 56 57 58 59 60 61 ... 109 110

No comments

ZyXEL ZyAIR G-470 User Manual Page 56