Extreme Networks Summit WM Series Guia do Utilizador descarregar pdf (Página 21)

Summit WM Series WLAN Switch and Altitude Access Point Software Version 4.1 User Guide

1 Overview of the Summit WM series switch, access

points, and WLAN switch software solution

This chapter describes Summit WM series switch, access points, and WLAN switch software concepts,

including:

● Conventional wireless LANs

● Elements of the Summit WM series switch, access points, and WLAN switch software solution

● Summit WM series switch, access points, and WLAN switch software and your network

● System Configuration Overview

The next generation of Extreme Networks wireless networking devices provides a truly scalable WLAN

solution. Extreme Networks Altitude APs are fit access points controlled through a sophisticated

network device, the Summit WM series switch. This solution provides the security and manageability

required by enterprises and service providers.

The Summit WM series switch, access points, and WLAN switch software system is a highly scalable

Wireless Local Area Network (WLAN) solution developed by Extreme Networks. Based on a third

generation WLAN topology, the Summit WM series switch, access points, and WLAN switch software

system makes wireless practical for service providers as well as medium and large-scale enterprises.

The Summit WM series switch, access points, and WLAN switch software system provides a secure,

highly scalable, cost-effective solution based on the IEEE 802.11 standard. The system is intended for

enterprise networks operating on multiple floors in more than one building, and is ideal for public

environments, such as airports and convention centers that require multiple access points.

This chapter provides an overview of the fundamental principles of the Summit WM series switch,

access points, and WLAN switch software system.

Conventional wireless LANs

Wireless communication between multiple computers requires that each computer is equipped with a

receiver/transmitter—a WLAN Network Interface Card (NIC)—capable of exchanging digital

information over a common radio frequency. This is called an ad hoc network configuration. An ad hoc

network configuration allows wireless devices to communicate together. This setup is defined as an

independent basic service set (IBSS).

An alternative to the ad hoc configuration is the use of an access point. This may be a dedicated

hardware bridge or a computer running special software. Computers and other wireless devices

communicate with each other through this access point. The 802.11 standard defines access point

communications as devices that allow wireless devices to communicate with a distribution system. This

setup is defined as a basic service set (BSS) or infrastructure network.

To allow the wireless devices to communicate with computers on a wired network, the access points

must be connected to the wired network providing access to the networked computers. This topology is

called bridging. With bridging, security and management scalability is often a concern.

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Extreme Networks Summit WM Series Guia do Utilizador Página 21