Deck 2

Question 1

Collision Avoidance

Answer 1

Time slot written in the wireless which can be used to transmit a frame.

Question 2

Reduced inter frame space (RIFS)

Answer 2

Space between a burst of frames and the next frame

Question 3

Short inter frame space (SIFS)

Answer 3

Period of time between data frame and acknowledgement

Question 4

Distributed inter frame space (DIFS)

Answer 4

Default spacing between normal frames; standard

Question 5

Extended inter frame space (EIFS)

Answer 5

Used for collisions and re-transmissions

Question 6

Management frame

Answer 6

Beacon: used by access points to let it known what is available to clients
Probe: ability for clients to request access points to provide info
Authentication/De-authentication: authenticate access or no longer allow access.
Association/disassociation/re-association:
action management: request radio measurement; request information about power levels

Question 7

Control Frames

Answer 7

ACK: acknowledgement of sending a data frame
Block ACK: acknowledge of a burst of frames
RTS/CTS: allow you to reserve a channel

Question 8

Phase

Answer 8

The phase is just a measure of shift in time that is relative to the start of the cycle. signals can be aligned in phase or not aligned/out of phase.

Question 9

Amplitude

Answer 9

the amplitude represents how far the signals can travel before they can no longer be understood by a wireless receiver.