Chapter 7 quiz

Question 1

What is the term used for the information received by the PHY and ready to be processed by the PHY (PLCP) for transmission?

Answer 1

PSDU (Physical service data unit)

Question 2

What does a PPDU have that a PSU does not?

Answer 2

A PLCP header and PHY preamble or training information

Question 3

The guard interval is a small space between what other 802.11 components?

Answer 3

Symbols

Question 4

What was the length of the original guard interval before it was shortened with the ratification of 802.11n?

Answer 4

800 ns

Question 5

What is the name of the first field in the 802.11 general frame format?

Answer 5

Frame Control

Question 6

What kind of frame must be transmitted by a STA when that STA successfully receives a data frame?

Answer 6

ACK

Question 7

When active scanning is used, what frame types are involved in the exchange?

Answer 7

Probe Request and Probe Response

Question 8

How is State 2 of the 802.11 state machine described?

Answer 8

Authenticated and unassociated

Question 9

After 802.1X/EAP or PSK authentication is successful, what needs to transpire?

Answer 9

4-way handshake

Question 10

Which one of the following is not commonly used by clients in BSS selection, within known algorithms or metrics?

Answer 10

AP vendor ID