802.11i-2004 is a wireless LAN security amendment for the 802.11 family, defining Medium Access Control (MAC) security enhancements for communication, networking and broadcast technologies. It addresses how Wi-Fi systems protect traffic at the MAC layer, helping improve confidentiality, integrity, and access control in networked devices and infrastructure. For organizations selecting or verifying wireless standards, this document is important because it sets a technical basis for consistent security implementation and compliance review.

About 802.11i-2004

This standard, titled Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) specifications: Amendment 6: Medium Access Control (MAC) Security Enhancements, focuses on strengthening security mechanisms within IEEE 802.11 wireless networking. 802.11i-2004 is commonly associated with secure WLAN design, specifying how MAC-layer protections are applied in wireless communication environments. As a superseded document, it remains relevant for understanding the development of WLAN security requirements and for comparing legacy implementations against later revisions.

Where is 802.11i-2004 used?

802.11i-2004 is relevant in wireless access points, client adapters, enterprise WLAN controllers, and other network equipment that implements 802.11 security features. It is especially useful in environments where controlled wireless access and authenticated connectivity matter, such as office networks, campus deployments, industrial communications, and managed public access systems. The standard helps define the security behavior expected between devices in the WLAN stack, making it useful for engineering, verification, and procurement of compliant equipment.

Importance in practice

In practice, 802.11i-2004 helps reduce ambiguity when evaluating wireless security behavior and comparing vendor implementations. It supports more consistent design decisions for MAC-level protection, which can improve interoperability and lower the risk of insecure or mismatched configurations. For buyers and technical teams, the standard can also aid specification checks, test planning, and legacy system support. Because it is superseded, it is often referenced for historical context or for reviewing older WLAN deployments that were built around its requirements.

• MAC-layer wireless security enhancements
• IEEE 802.11 WLAN context
• Enterprise and managed network equipment
• Legacy compliance and comparison
• Security implementation reference