802 11 architecture pdf

A packet is a unit of data that is transmitted over the network. Stations comprise all devices and equipments that are connected to the wireless lan. The initial release of the standard capable of transmissions of. History and implementation of ieee 802 security architecture. Scribd is the worlds largest social reading and publishing site. An extended service set ess consists of two or more basic service sets interconnected by a distribution system to integrate the ieee 802. The smallest building block of a wireless lan is a basic service set bss, which consists of some number of stations executing the same mac protocol and competing for access to the same shared wireless medium. A bss is made of stationary or moving wireless stations and a central base station called as the.

Today, three different physical phy layers for the ieee 802. It describes the reference models for the ieee 802 standards and explains the relationship of these standards to the higher layer protocols, it provides a standard for the structure of ieee 802 mac addresses, it provides a standard for identification of public, private, prototype, and standard protocols, it specifies an object identifier. It is tolerant of faults in all of the wlan equipment and eliminates possible bottlenecks a centralized architecture would introduce. This allows transmission of much more data during the same. Architecture and techniques for diagnosing faults in ieee. This pertains to wireless lans and provides 1 or 2mbps transmission in the 2. In this blog, we will discuss the basic components of the 802.

Technical corrections and clarifications to ieee std 802. Amendments 1 to 5 published in 2012 and 20 have also been incorporated into this revision. Users connected by wlans can move around within the area of network coverage. A bss may isolated or it may connect to a backbone distribution system ds through an access point ap. Each computer, mobile, portable or fixed, is referred to as a station in 802.

Pdf evolution of wireless lan security architecture to. Especially at airports, university campuses or in city centers, wlan coverage is becoming ubiquitous leading to a deployment of hundreds or thousands. The stations, which may be either fixed or mobile, and the central base station. A portal is the logical point at which msdus from an integrated nonieee 802. If a station is part of an ibss, it is allowed to implement the data. Wifi is the name given by the wifi alliance to the ieee 802. To know more on these visit our article on differences between them. To achieve a high performance under varying conditions. The pdf of this standard is available at no cost compliments of the. A bss typically contains one or more wireless stations and a central base station, known as an access point ap in 802. The definitive guide oreilly media, now in its second edition, is the top selling reference work in the field and has been translated into six languages. The basic component of any network communication is data, which is in the form of packets, frames, or bits. These wlan standards are mainly used for data communication and incorporated today in each and every. Mesh stas form mesh links with one another, over which mesh paths can be established using an ad hoc mobile routing protocol.

Below is a listing of each of the wireless ieee standards currently available. When this information is found, the station looks at the mac address of where the beacon originated and sends an authentication request in. Note in this bandwidth all these protocols have to deal with. Architecture is designed to support a network where mobile station is responsible for the decision making. A key aspect of this architecture is the presence of multihop wireless links and routing of packets through other nodes towards the. Ieee 8022014 ieee standard for local and metropolitan. It defines an overtheair interface between a wireless client and a base station or between two wireless clients. The difference between a portable and mobile station is that a portable station moves from point to point but is only used at a fixed point. Each cell called basic service set, or bss, in the 802. The wifi alliance defines wifi devices as any wireless local area network wlan products that are. Qos and backward compatibility with legacy ieee 802.