Wired & Wireless Networks

Wired & Wireless Networks

1. Protocols & Layers

2. Client Server networks

3. The Internet

4. Local Area Networks

5. Wireless networking

   • Wireless Hardware
     • Wireless Network Interface Card (WNIC)
     • Wireless Access Point allows wireless devices to connect to a wireless network
   • Data Transmission
     • Commonly Uses Radio Waves
     • Data can be intercepted on a wireless network
       • So should be encrypted
         • Wireless Encryption Standards
           • Wired Equivalent Privacy (WEP)
           • Wi-Fi Protected Access (WPA)
           • Wireless Protected Access Version 2 (WPAv2) most secure
   • Frequencies & Channels
     • 802.11 standard
       • 2.4Ghz, 3.6Ghz, 4.9Ghz, 5Ghz, 5.9Ghz
       • Each frequency is subdivided into channels
     • 2.4Ghz Greater Range and coverage but more interference as overlapping channels
     • 5Ghz Higher data transmission rates as fewer overlapping channels, fewer devices can attach and less able to go through walls