difference between IEEE 802.11e, 11f, 11h, 11i, 11j, 11k, 11m, 11p, 11r, IEEE 11w, 11u, 802.11x

This page compares IEEE 802.11e 11f 11h 11i 11j 11k 11m 11p 11r 11w 11u 11x and provide difference between 11e 11f 11h 11i 11j 11k 11m 11p 11r 11w 11u 11x 802.11 IEEE standards.

802.11 standard Features
IEEE 802.11e This version 802.11e adds QoS features to 802.11 standard family
IEEE 802.11f This version 802.11f adds interoperability between APs to existing IEEE 802.11 standards
IEEE 802.11h The version 802.11h mentions resolution to existing 802.11 interference related issues
IEEE 802.11i This version 802.11i improves security of existing 802.11a/11b/11g based networks. It uses new key encryption protocols such as TKIP(Temporal key integrity protocol) and AES(Advanced Encryption standard) Also refer WLAN security basics
IEEE 802.11j The standard version 802.11j is Japanese extensions to existing 802.11a version
Data rate:3-27Mbps,6-54Mbps
Frequency channels:Additional to 4.9-5GHz bands
IEEE 802.11k This version 802.11k adds RRM(Radio Resource Measurement) for 802.11 based products to make WLAN network more efficient
IEEE 802.11m This version 802.11m adds enhancement to existing maintenance features, improves and amends 802.11 protocols
IEEE 802.11p (WAVE) This version 802.11p amends existing 802.11 standard to provide wireless access in vehicular environments
Channel spacings of 5MHz, 10MHz and 20MHz are added to 5.9GHz frequency band
802.11p is used to provide data communication among different vehicles (i.e. V2V) and also between vehicles & road-side infrastructure (i.e. V2I)
It covers coverage range of 1 km with 3-27 Mbps data rate with velocity of 260Km/h. It is used for car to car communication.
IEEE 802.11r This version 802.11r is used to provide fast roaming. This version adds new roaming concept where in handshake with new Access Point(AP) is made before client(STA) actually moves to the target AP area. This is known as Fast Transition roaming or FT roaming. This handshake concept allows prior PTK calculation between client and APs. PTK is the short form of Pairwise Transient Key.
IEEE 802.11w This version 802.11w increases security of 802.11 management frames(class 1, class 2 and class 3) IEEE 802.11w standard has added new IGTK Key. It is used to protect broadcast as well as multicast robust management WLAN frames.
IEEE IEEE 802.11u This version 802.11u is amendment to IEEE 802.11-2007 standard. It enhances capabilities of wifi network. It specifies interworking with the other external networks. Hotspot 2.0 product name as per 802.11u is given by wifi alliance.
IEEE 802.11x This abbreviation 802.11x is used for all the IEEE 802.11 family of protocols where in letter 'x' stands for various suffix letters such as 'a', 'b', 'g', 'n', 'ac', 'ad', 'e', 'f', 'h', 'i', 'j', 'k', 'm', 'p', 'r', 'w' etc.

The other IEEE standard 802.1X is a port based NAC(Network Access Control) which allows administrators to provide restricted use of WLAN SAPs. This 802.1X helps network administrators to provide secured communication between authorized & authenticated WLAN devices.

What is Difference between 802.11a, 11b, 11g, 11n, 11ac, 11ad, 11ac wave1, 11ac wave2

Following links mentioned below for comparison between 802.11a, 11b, 11g, 11n, 11ac, 11ad, 11ac wave1 and 11ac wave2.
Difference between 11n 11ac and 11ad
Difference between 11ac wave1 and 11ac wave2
Difference between 802.11 standards viz.11-a,11-b,11-g and 11-n

RF and Wireless Terminologies