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276 AT-TQ2403 - Management Software - User's Guide
802.11i
IEEE 802.11i is a comprehensive IEEE standard for security in a wireless local area network (WLAN) that
describes Wi-Fi Protected Access 2 (WPA2). It defines enhancements to the MAC Layer to counter the
some of the weaknesses of WEP. It incorporates stronger encryption techniques than the original Wi-Fi
Protected Access (WPA), such as Advanced Encryption Standard (AES).
The original WPA, which can be considered a subset of 802.11i, uses Temporal Key Integrity Protocol
(TKIP) for encryption. WPA2 is backwards-compatible with products that support the original WPA
IEEE 802.11i / WPA2 was finalized and ratified in June of 2004.
802.11j
IEEE 802.11j standardizes chipsets that can use both the 4.9 and 5 GHz radio bands according to rules
specified by the Japanese government to open both bands to indoor, outdoor and mobile wireless LAN
applications. The regulations require companies to adjust the width of those channels. IEEE 802.11j allows
wireless devices to reach some previously unavailable channels by taking advantage of new frequencies and
operating modes. This is partially an attempt to mitigate the crowding on the airwaves, and has tangential
relationships to IEEE 802.11h.
802.11k
IEEE 802.11k is a developing IEEE standard for wireless networks (WLANs) that helps auto-manage network
Channel selection, client Roaming, and Access Point (AP) utilization. 802.11k capable networks will
automatically load balance network traffic across APs to improve network performance and prevent under
or over-utilization of any one AP. 802.11k will eventually complement the 802.11e quality of service (QoS)
standard by ensuring QoS for multimedia over a wireless link.
802.1p
802.1p is an extension of the IEEE 802 standard and is responsible for QoS provision. The primary purpose
of 802.1p is to prioritize network traffic at the data link/ MAC layer. 802.1p offers the ability to filter
multicast traffic to ensure it doesn’t increase over layer 2 switched networks. It uses tag frames for the
prioritization scheme.
To be compliant with this standard, layer 2 switches must be capable of grouping incoming LAN packets into
separate traffic classes.
802.1Q
IEEE 802.1Q is the IEEE standard for Virtual Local Area Networks (VLANs) specific to wireless technologies.
(See http://www.ieee802.org/1/pages/802.1Q.html.)
The standard addresses the problem of how to break large networks into smaller parts to prevent broadcast
and multicast data traffic from consuming more bandwidth than is necessary. 802.11Q also provides for
better security between segments of internal networks. The 802.1Q specification provides a standard
method for inserting VLAN membership information into Ethernet frames.