2.3 Compare and contrast protocols for wireless networking.

Question 1

802.11b & 801.11g operate in this frequency.

Answer 1

2.4GHz

Question 2

802.11a, 802.11n, 802.11ac, & 802.11ax operate in this frequency.

Answer 2

5GHz

Question 3

Complex laws that every country has.

Answer 3

Regulations

Question 4

Uses the 2.4ghz range. Short range

Answer 4

Bluetooth.

Question 5

Original Wireless standard (1999). Operates in 5ghz range. 54 megabits per second (Mbit/s). Similar to 802.11b. Not as common today.

Answer 5

802.11a

Question 6

Another original wireless standard (1999). Operates in the 2.4 GHz range. 11 megabits per second (Mbit/s). Better range than 802.11a, less absorption problems. More frequency conflict (cordless phones, ovens, bluetooth, baby monitors). Not as common today.

Answer 6

802.11b

Question 7

An “upgrade” to 802.11b - June 2003. Operates in the 2.4 GHz range. 54 megabits per second (Mbit/s) - Similar to 802.11a. Backwards-compatible with 802.11b. Same 2.4 GHz frequency conflict problems as 802.11b.

Answer 7

802.11g

Question 8

The update to 802.11g, 802.11b, and 802.11a (October 2009). Operates at 5ghz and or 2.4ghz. 600 megabits per second. Uses Multiple-input multiple-output & Multiple transmit and receive antennas.

Answer 8

802.11n (Wi-Fi 4)

Question 9

Approved January 14. Improvements over 802.11n. Operates in 5ghz range. Increased channel bonding - Larger bandwidth usage. Denser signaling modulation. Eight MU-MIMO downlink streams. Nearly 7 gigabits per second.

Answer 9

802.11ac (Wi-Fi 5)

Question 10

Approved February 2021. Successor to 802.11ac. Operates at 5ghz and or 2.4ghz.1,201 megabits per second per channel. Uses Orthogonal frequency-division multiple access (OFDMA).

Answer 10

802.11ax (WI-FI 6)

Question 11

Access point in a house with stock antennas. Outdoors. Unlicensed 2.4 GHz or 5 GHz frequencies. Additional frequencies may be available. Additional licensing may be required. Indoor and outdoor power is regulated. Regulations vary by country.

Answer 11

Long-range fixed wireless

Question 12

Two-way wireless communication. Includes payment systems like cards and online wallets. Helps with Bluetooth pairing. Short range with encryption support.

Answer 12

NFC (Near field communication)

Question 13

Access badges– Inventory/Assembly line tracking– Pet/Animal identification– Anything that needs to be tracked. Energy transmitted to the tag– RF powers the tag, ID is transmitted back– Bidirectional communication– Some tag formats can be active/powered.

Answer 13

RFID (Radio-frequency identification)