Wi-Fi or WiFi
- is a technology for wireless local area networking with devices based on the IEEE 802.11 standards
- Wi-Fi is a trademark of the Wi-Fi Alliance, which restricts the use of the term Wi-Fi Certified to products that successfully complete interoperability certification testing
- commonly uses the 2.4 gigahertz (12 cm) UHF and 5 gigahertz (6 cm) SHF ISM radio bands
- it is more vulnerable to attack than wired connections, such as Ethernet.
WiFi - How It Works
WiFi - Extra Features
- WiFi - Distributed Systems (Access Points (AP))
- WiFi - Secure Access (WEP - WPA - WPA2 - WPA3)
- WiFi - Multiple Input Multiple Output (MIMO)
WiFi - 802.11 Variants
|
802.11 Variants |
Bits Per Second |
Description | |
|---|---|---|---|
|
802.11 |
2 Mbps |
2.4-Ghz |
legacy |
|
802.11b |
2 Mbps |
2.4-Ghz | |
|
802.11b variant |
11 Mbps |
2.4-Ghz | |
|
802.11a |
54 Mbps |
5-Ghz |
limited almost line of sight |
|
802.11g |
54 Mbps |
2.4-Ghz | |
|
802.11n |
300 Mbps |
2.4-Ghz |
introduced MIMO |
|
802.11ac |
7Gbps | ||
|
802.11e |
adds Quality of Service (QoS) features to existing 802.11 family specifications | ||
|
802.11f |
adds Access Point Interoperability to existing 802.11 family specifications | ||
|
802.11i |
| ||
|
802.11j |
Japanese regulatory extensions to 802.11 family specifications | ||
|
802.11k |
radio resource measurement for 802.11 specifications so that a wireless network can be used more efficiently | ||
|
802.11ax | |||
|
802.11x |
accept or reject users who want full access to a network using 802.1x. It is a security protocol that works with 802.11 wireless networks such as 802.11g and 802.11b, as well as with wired devices | ||
|
802.11m |
enhanced maintenance features, improvements, and amendments to existing 802.11 family specifications | ||
|
802.11h |
resolves interference issues with existing 802.11 family specifications | ||
|
802.11s |
specifies standard for mesh networks |