Standard: Comparison and Security Jason Gibson TCM471 Professor Crum

Introduction: History  Television Remote Control  Cordless Phones  Cellular Phones  Business Applications

IEEE Institute of Electrical and Electronics Engineers  Ensure Compatibility  Define Standards  Research New Technology  Wireless Standards   b  a  g

IEEE  Developed in 1997  Supports High Data Rates - 1 to 2 Mbps  Operates at 2.4 GHz 2.4 GHz  Layer 1 -FHSS -DSSS  Layer 2 - CSMA/CA

IEEE b  Released in 1999  Support Higher Data Rates to 11 Mbps  Operates at 2.4 GHz  3 non- overlapping channels  Long Range Problem  Interference

IEEE a  Released September 1999  Support Higher Data Rates - 54 Mbps - 54 Mbps  Operates at 5 GHz  OFDM Problems  Limited Range  Interoperability

IEEE g  Scheduled Approval, May 2003  Support High Data Rates like a - 54 Mbps - 54 Mbps  Operates at 2.4 GHz like b  Backward Compatibility

Wireless Local Area Networks

Ad-hoc Mode - IBSS  Clients in same cell communicate directly  Other clients act as gateways within cell  Bluetooth

Infrastructure Mode - BSS  Centrally located access point  Management Frame Exchange  Association Process

Security Methods  Wired Equivalency Protocol (WEP)  Security Measures –Authentication –Confidentiality –Integrity  Vulnerabilities

Types of Attacks  Passive Attack –Eavesdropping –Traffic Analysis  Active Attack –Masquerading –Denial of Service

Security Solutions  Utilize Multiple Defensive Strategies  Virtual Private Networks (VPN’s)  Regular Password Updates  Changing Default SSID and Cryptographic Keys  Install Intrusion Detection system

QUESTIONS?