DONE 802.11 Standards and Technologies

802.11a

5Ghz at 54Mbps

802.11b

2.4Ghz at 11Mbps

802.11g

2.4Ghz at 54Mbps

802.11b

what standard(s) is 802.11g backwards compatible with?

802.11n

2.4Ghz and 5Ghz at 72Mbps or 600Mbps bonded

HT Mode

What feature of 802.11 ensures compatibility with older standards but lowers overall WLAN performance?

802.11a, 802.11b, 802.11g

802.11n is backwards compatible with?

1, 6, 11

What channels in 2.4GHz don’t overlap?

802.11ac

5GHz at 1 Gbps and up

802.11ac

Which standard introduced MU-MIMO

802.11ax

2.4Ghz, 5Ghz, and 6Ghz at up to 10 Gbps

802.11n

Which standard introduced MIMO and Channel Bonding?

802.11g

Which standard introduced DSSS and OFDM

CSMA/CA

used by Wi-Fi to cope with contention over shared media

CSMA/CD

used by wired networks to cope with contention over shared media

MIMO

enables use of multiple rx and tx antennae to boost bandwidth and range

MIMO-MU

enables use of multiple rx and tx antennae to support multiple client connects simultaneously, replacing CSMA/CA

Channel Bonding

enables aggregating adjacent wireless channels to increase bandwidth

Band Steering

attempts to connect clients to a certain frequency band, instead of client devices deciding

802.11h

Enables devices to selects channels not in use and control broadcast power of client

Narrowband-IoT

greater penetrating power than regular cellular

LTE-M

lower power draw than regular cellular

802.11ax

Introduced OFDMA and BSS Coloring to increase efficiency and reduce interference in 2.4GHz and 5GHz bands.

802.11ax

What 802.11 Standard is best in crowded areas?