Building Secure Wireless Networks with 802.11

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Building Secure Wireless Networks with 802.11


Building Secure Wireless Networks with 802.11………………………………………………………………….1


Introduction………………………………………………………………………………………………………………………4


Who Should Read This Book:……………………………………………………………………………………..4


What You Need to Know:……………………………………………………………………………………………5


How This Book Is Organized………………………………………………………………………………………5


Part I: Introduction to Wireless Local Area Networks (LANs)………………………………………………8


Chapter List……………………………………………………………………………………………………………..8


Part Overview:……………………………………………………………………………………………………..8


Chapter 1: Networking Basics………………………………………………………………………………………….10


Highlights……………………………………………………………………………………………………………….10


Development of Computer Networks: An Overview:……………………………………………………..10


Network Types………………………………………………………………………………………………………..13


Peer-to-Peer Networks……………………………………………………………………………………..13


Local Area Networks (LANs)……………………………………………………………………………….13


Wide Area Networks (WANs)………………………………………………………………………………14


Personal Area Networks (PANs)………………………………………………………………………….15


The Internet………………………………………………………………………………………………………15


Virtual Private Networks (VPNs)…………………………………………………………………………..16


Network Topologies…………………………………………………………………………………………………16


Three Commonly Used Topologies………………………………………………………………………16


Choosing the Right Topology:………………………………………………………………………………18


Network Hardware and Software……………………………………………………………………………….18


Networking Components…………………………………………………………………………………….19


Networking Software………………………………………………………………………………………….26


Networking Protocol: TCP/IP……………………………………………………………………………….27


Putting It All Together………………………………………………………………………………………………29


Summary::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::30


Chapter 2: Wireless LANs………………………………………………………………………………………………..31


Highlights:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::31


Evolution of Wireless LANs: An Overview…………………………………………………………………..31


A Basic Wireless LAN::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::32 Basic Architecture of a Wireless LAN::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::33 Wireless LAN Adapters::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::33


Access Points (APs)…………………………………………………………………………………………..39


Wireless LAN Configurations…………………………………………………………………………………….40


Ad-Hoc Mode……………………………………………………………………………………………………40


Infrastructure Mode……………………………………………………………………………………………40


Distribution Service Systems (DSSs)……………………………………………………………………40


Existing Wireless LAN Standards………………………………………………………………………………42


IEEE 802.11………………………………………………………………………………………………………42


IEEE 802.11 b…………………………………………………………………………………………………..42


IEEE 802.11 a…………………………………………………………………………………………………..42


HomeRF…………………………………………………………………………………………………………..42


Bluetooth…………………………………………………………………………………………………………..42


Are Wireless LANs Risks to Health?………………………………………………………………………….43


Security Risks…………………………………………………………………………………………………………43


Chapter 2: Wireless LANs


43


Chapter 3: The Institute of Electrical and Electronics Engineers (IEEE) 802.11 Standards….44


Summary……………..


Overview………………………………………………………………………………………………………………..44


History of IEEE:……………………………………………………………………………………………………….44


IEEE 802 Wireless Standards…………………………………………………………………………………..45


The 802.11    Working Group:…………………………………………………………………………………45


The 802.15    Working Group:…………………………………………………………………………………45


The 802.16    Working Group:…………………………………………………………………………………46

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