The document discusses the IEEE 802.11 system architecture and protocol architecture. It describes the basic components of an 802.11 network including the basic service set (BSS) and extended service set (ESS). It explains that a BSS connects wireless stations and an ESS connects multiple BSSs through an access point. It also outlines the two operating modes of 802.11 including infrastructure mode with an access point and ad hoc mode where clients communicate directly. Finally, it provides an overview of the IEEE 802 protocol architecture.

1. IEEE 802.11 SYSTEM ARCHITECTURE
And
PROTOCOL ARCHITECTURE
PRESENTED BY : Prof. VIRENDRA KHATARKAR
ASST PROFESSOR
DEPARTMENT OF COMPUTER SCIENCE AND ENGINEERING
BIST, BHOPAL

2. Topic : IEEE 802.11 System Architecture By : Prof. Virendra khatarkar
 Basic Service Set (BSS)
 Extended Service Set (ESS)
 IEEE 802.11 Operating modes
 IEEE 802 protocol architecture

3. Topic : IEEE 802.11 System Architecture By : Prof. Virendra khatarkar

4. Topic : Basic Service Set (BSS) By : Prof. Virendra khatarkar
BASIC SERVICE SET (BSS)
Basic service set (BSS) consists of some number of stations executing the same MAC protocol
and competing for access to the same shared wireless medium
A BSS may be isolated or it may connect to a backbone distribution system (DS)
through an access point (AP)
In a BSS, client stations do not communicate directly with one another
In an IBSS the stations all communicate directly
 No AP is involved
 An IBSS is typically an ad hoc network. IEEE 802.11 Architecture and Services

5. Topic : Extended Service Set (ESS) By : Prof. Virendra khatarkar
EXTENDED SERVICE SET (ESS)
An extended service set (ESS) consists of two or more basic service sets interconnected
by a distribution system
To integrate the IEEE 802.11 architecture with a traditional wired LAN, a portal is used
IEEE 802.11 Architecture and Services

6. Topic : IEEE 802.11 Operating modes By : Prof. Virendra khatarkar

7. Topic : IEEE 802.11 Operating modes By : Prof. Virendra khatarkar
802.11 Infrastructure Mode
 at least one wireless AP and one wireless client.
802.11 Ad Hoc Mode
 wireless clients communicate directly with each other without the use of a
wireless AP

8. Topic : IEEE 802 Protocol Architecture By : Prof. Virendra khatarkar

9. Topic : By : Prof. Virendra khatarkar
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