802.11

Question 1

802.11b

Answer 1

2.4 GHz

11 Mbps

22 MHz Channels

3 non overlapping channels
1, 6, 11

Range: 35 m / 115 ft

Question 2

802.11g

Answer 2

An upgrade from 802.11b

2.4 GHz

54 Mbps

20 MHz Channels

3 non overlapping channels:

   1, 6, 11

Range: 38 m / 125 ft

Question 3

802.11n

Answer 3

2.4 and 5 GHz (Channel Bonding)

600 Mbps

Uses 4 MIMO (multi-input , multi-output)

Can have 4 antennas for multiple transmitters and receivers

Only services one device at a time.

20 or 40 MHz Channels

Range: 70 m / 230 ft

Question 4

802.11ac

Answer 4

5 GHz

6.8 Gbps

20, 40, 80, 160 MHz Channels

8 Multi User- MIMO

8 Antennas

Services multiple devices at a time.

Range: 35 m / 115 ft

Question 5

802.11a

Answer 5

5 GHz

54 Mbps

22 MHz Channels

12 Non overlapping channels (as per Todd Lammle Network Plus Study Guide) :

     36, 40, 44, 48, 52, 56, 60, 64, 149, 153, 157, 161

Range: 35 m / 115 ft

Question 6

802.11h

Answer 6

Extension of 802. 11a

5 GHz

54 Mbps

20 MHz Channels

23 Non overlapping channels

2 New features. DFS (Dynamic Frequency Selection) and TPC (Transmit Power Control)