Table of Contents
IEEE 802.11: Types of frames
Whereas IEEE 802.3 knows only one frame: Ethernet frame, IEEE 802.11 knows a couple:
"Typical" 802.11 Frame
| MAC header | frame body | FCS (frame check sequence) | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Name | Frame Control Field |
Duration/ID | Adress 1 | Adress 2 | Adress 3 | Sequence Control Field |
Adress 4 | Frame Body | FCS Field |
| Octets | 2 | 2 | 6 | 6 | 6 | 6 | 6 | 0–2312 | 4 |
.
| Frame Control Field | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Name | Protocol Version |
Type | Subtype | To DS | From DS | More Fragments | Retry | Power Mngt. | More Data | WEP | Order |
| Bits | 2 | 2 | 4 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
.
| Sequence Control Field | ||
|---|---|---|
| Name | Sequence Number | Fragment Number |
| Bits | 12 | 4 |
Overview
Management Frames
- Beacons
- Probe Req/Resp
- Association
- Authentication
Control Frames
- CTS/RTS
- ACK
Data Frames
- Null Data
- ARP
- ICMP (Ping)
- IP
- UDP
- TCP
- OLSR
- BATMAN
Understanding 802.11 Frame Types
doc/networking/wireless.frames.txt · Last modified: 2012/03/31 11:40 by orca