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Among the 35 and growing IEEE 802.11 standards are a host of standards devoted to maintenance, expansion, corrections, enhanced functionality, internationally interoperability, and security enhancement.  Listed below are the current standards that only the most knowledgeable wireless buffs would know about:

IEEE 802.11c: This standard, which was added in 2001 to bridge operational procedures, also is included in the IEEE 802.1D standard.

IEEE 802.11d: Added in 2001 as the international roaming-extensions standard, it allows wireless access points and client devices to conform to the regulations enforced in various countries.

IEEE 802.11e: This quality-of-service (QoS) enhancement was added in 2005 through modifications to the media-access-control (MAC) layer, benefiting time-delay-sensitive applications like voice-over-wireless-LAN and multimedia streaming

IEEE 802.11h: This standard was added in 2004 as a spectrum-managed, European-compatible version of IEEE 802.11a with throughput to 5 GHz. It provides dynamic-frequency-selection (DFS) and transmit-power-control (TPC) regulations, which solve interference problems with satellites and radar using the 5-GHz bands.

IEEE 802.11i: This enhanced security standard was implemented as Wireless Protected Access Two (WPA2) in 2004. It replaced the original clause with a detailed “security” clause and deprecated Wireless Equivalent Privacy (WEP).

IEEE 802.11j: This standard extension was added in 2004 to aid conformance with Japanese rules for indoor/outdoor applications, mobile applications, and radio applications in the 4.9-to-5.0-GHz bands.

IEEE 802.11k: The IEEE 802.11k standard was added in 2008 as an enhancement for radio resource management and mobile-WLAN maintenance.

IEEE 802.11p: In 2010, IEEE 802.11p was added as the Wireless Access for the Vehicular Environment standard. It supports Intelligent Transportation Systems (ITS) applications including data exchange between high-speed vehicles and roadside infrastructure. IEEE 802.11p is licensed in the 5.850-to-5.925-GHz ITS band.

IEEE 802.11r: The fast BSS transition (FT) amendment, which dates back to 2008, permits fast and secure handoffs between base stations for continuous connectivity with wireless devices in motion.

IEEE 802.11s: This standard was added in 2011 to account for mesh networking and extended service set (ESS) for static topologies and ad-hoc networks when creating WLAN mesh networks.

IEEE 802.11u: To aid the offloading of cellular networks, this 2011 standard provides improvements related to hot spots, third-party client authorization, and commercial establishments.

IEEE 802.11v: IEEE 802.11v was added in 2011 to allow the configuration of client devices while connected to wireless networks as a method of wireless network management.

IEEE 802.11w: To increase security, this 2009 standard provides management frames that are confidential. (Management frames are controls that enable data integrity, data origin authenticity, and replay protection.)

IEEE 802.11y: Added in 2008, this standard enables high-power data-transfer equipment in the US 3650-to-3700-MHz band to operate using the 802.11a standard.

IEEE 802.11z: This 2010 standard extends the Direct Link Setup (DLS) protocol, thereby allowing for a direct link between WLAN devices after accessing a wireless network, such as tunneled DLS (TDLS).

IEEE 802.11aa: This standard, which was added in 2012, includes enhancements to the robust, reliable, and fast transfer of video-streaming information over WLAN networks.

IEEE 802.11ae: In 2012, 802.11ae was added to amend the capability to prioritize management frames.

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