Frames Overview

Question 1

Data Frame

Answer 1

Main purpose of a network is to transport data.

802.11 defines a data frame type that carries packets from higher layers, such as web pages, printer control data, etc; within the body of the frame.

When viewing 802.11 data frames with a packet analyser, you can generally observe the contents of the frame body to see what packets that the 802.11 data frames are transporting.

Question 2

Frame

Answer 2

Self-contained, independent entity of data carrying sufficient information to be transported from source to destination.

Each 802.11 frame contains up to four addresses.

Source, Transmitter, Receiver, and Destination addresses.

Question 3

Source Address

Answer 3

The MAC of the device that generated the frame.

Question 4

Transmitter Address

Answer 4

The MAC that transmitted the frame onto the medium, used in wireless bridging.

Question 5

Receiver Address

Answer 5

The MAC of the device that will receive the frame over the LAN.

Question 6

Destination Address

Answer 6

The MAC of the final device that will hand the frame to higher protocols.