2.4 Wireless Standards and Technologies

Question 1

What are the frequencies, maximum MIMO streams, maximum theoretical throughput (per stream), maximum theoretical throughput (total) of the given 802.11 standard:
802.11a

Answer 1

5GHz, N/A, 54Mbit/s, 54Mbit/s

Question 2

What are the frequencies, maximum MIMO streams, maximum theoretical throughput (per stream), maximum theoretical throughput (total) of the given 802.11 standard:
802.11b

Answer 2

2.4GHz, N/A, 11Mbit/s, 11Mbit/s

Question 3

What are the frequencies, maximum MIMO streams, maximum theoretical throughput (per stream), maximum theoretical throughput (total) of the given 802.11 standard:
802.11g

Answer 3

2.4GHz, N/A, 54Mbit/s, 54Mbit/s

Question 4

What are the frequencies, maximum MIMO streams, maximum theoretical throughput (per stream), maximum theoretical throughput (total) of the given 802.11 standard:
802.11n

Answer 4

5GHz/2.4GHz, 4x MIMO, 150Mbit/s, 600Mbit/s

Question 5

What are the frequencies, maximum MIMO streams, maximum theoretical throughput (per stream), maximum theoretical throughput (total) of the given 802.11 standard:
802.11ac

Answer 5

5GHz, 8x DL MU-MIMO, 867Mbit/s, 6.9Gbit/s

Question 6

What are the frequencies, maximum MIMO streams, maximum theoretical throughput (per stream), maximum theoretical throughput (total) of the given 802.11 standard:
802.11ax

Answer 6

5GHz/2.4GHz, 8x DL and UL MU-MIMO, 1201Mbit/s, 9.6Gbit/s

Question 7

What is a SSID (Service Set Identifier)?

Answer 7

The name for the broadcast network names advertised to wireless stations by access points.

Question 8

What is a BSS (Basic Service Set)?

Answer 8

BSS wireless network types have just one access point, so clients don’t roam between APs.

Question 9

What is an ESS (Extended Service Set)?

Answer 9

Extended Service Sets are created when the same SSID is advertised on multiple APs.

Question 10

What is an IBSS (Independent Basic Service Set)?

Answer 10

IBSS is an ad-hoc connection between two stations, no access points or other infrastructure devices are required.

Question 11

What encryption does Wi-fi Protected Access (WPA) use?

Answer 11

Implemented an algorithm called Temporal Key Integrity Protocol (TKIP) alongside the RC4 cipher.

Question 12

What encryption does Wi-fi Protected Access 2 (WPA2) use?

Answer 12

Implements CCMP-AES encryption.

Question 13

Which of the following technologies allows for global cellular communications by identifying the subscriber with a SIM card?

Answer 13

GSM