Preface Introduction Network Security Introduction Weaknesses in Network Security Relevant Resources Objectives of a Security Strategy Security Aspects concerning the Internet WLAN WLAN Basic Principles IEEE 802.11 Overview Wireless Fidelity WMAN Key Terminology Architecture and Components Security Requirements Recent Developments Mobile Phones Context Basic Principles Communication Protocols Services Mobile Phones and WLAN Threats and Protection Special Case Blackberries VoIP Security Check Directive Checklist Bluetooth Introduction Technical Basics System Topology Connecting to the Network Version Security Aspects Risk Potentials Countermeasures Checklist Infra Red Background IrDA Applications Security Aspects Checklist Near Field Communication Introduction Technology Specifications Security Aspects Conclusions Security Policy Introduction Scope Information and Communication Security Physical Security Documentation Wireless Security Summary Emergency Management in Communication Networks Emergency Management Systems Standards Requirements for Businesses BCM Overview Training and Testing Contents of an Emergency Concept (Documentation) Intermediate Conclusions The Emergency Process References.