Introduction to Wireless Networking Technologies

Wireless networking: Networks you connect to through radios and antennas

Frequency band: A certain section of the radio spectrum that’s been agreed upon to be used for certain communications

802.11 protocols = physical and data link layers

Frame control field: 16 bits long, it contains a number of sub-fields that are used to describe how the frame itself should be processed

Duration field: Specifies how long the total frame is

Wireless access point: A device that bridges the wireless and wired portions of a network

there are 4 address fields because there needs to be room to indicate which wireless access point should be processing the frame

Receiving address: The MAC address of the access point that should receive the frame

Transmitter address: The MAC address of whatever has just transmitted the frame

Sequence control field: A field that is 16 bits long and mainly contains a sequence number used to keep track of ordering the frames

Data payload section: Has all of the data of the protocols further up the stack of a frame

Frame check sequence: It is a 4-byte or 32-bit number that represents a checksum value for the entire frame