This standard was developed to provide security in IEEE 802 Local Area Networks (LANs) and Metropolitan Area Networks (MANs). The model for providing security services is described in clause 1. A Secure Data Exchange (SDE) protocol for IEEE 802 LANs and MANs is defined in clause 2. Key management and system/security management in IEEE 802 LANs and MANs are described in clauses 3 and 4. While SDE is independent of any key management or system management implementation, the security services described in this standard depend on management information provided by management entities.