Week 5 Wireless Networking Flashcards
Frequency band
A certain section of the radio spectrum that’s been agreed upon to be used for certain communications
Frame control field
16 bits long and contains a number of sub fields that are used to describe how the frame itself should be processed
Duration field
It specifies how long the total frame is, so the receiver knows how long it should expect to have to listen to this transmission
Wireless access point
A device that bridges the wireless and wired portions of a network
Receiver 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
16 bit long and mainly contains a sequence number used to keep track of the ordering of frames
Data payload
Has all of the data of the protocols further up the stack
Frame check sequence field (FCS)
Contains a checksum used for a cyclical redundancy check, just like how Ethernet does it
Channels
Individual, smaller sections of the overall frequency band used by wireless network
Collision domain
Any one network segment where one computer can interrupt another
Wired Equivalent Privacy (WEP)
An encryption that provides a very low level of privacy
Wi-Fi protected access (WPA)
128 bit key
WPA2
An update to WPA, uses 256 bit key
MAC filtering
You configure your access points to only allow for connections from a specific set of MAC addresses belonging to devices you trust
