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  1. 1. NetworkingInstalling, Securing, & Administering<br />240:237 - Coordinating Technology <br />in an Educational Setting<br />April 8, 2010<br />
  2. 2. NetworkingMedia<br />
  3. 3. Devices<br />LAN (Local Area Network)<br />WAN (Wide Area Network)<br />
  4. 4. LAN Devices<br />Hubs<br />Switches<br />Clean up electrical signals<br />Multiple ports<br />Extends network size<br />Increases the size of the collision domain<br />Forwards all traffic to everyone<br />Unmanaged<br />Clean up electrical signals<br />Multiple ports<br />Extends network size<br />Reduces the size of the collision domain<br />Filters traffic based upon MAC addresses<br />Unmanaged and managed<br />
  5. 5. Hub Switch<br />
  6. 6. Determines best path for data delivery<br />Use IP addresses to determine network location<br />Configuration <br />Command Line Interface - CLI<br />Graphical User Interface – GUI<br />WAN Devices - Routers<br />
  7. 7. Routers<br />
  8. 8. Addressing<br />MAC Addresses<br />IPv4 vs IPv6<br />Classes<br />Private Addressing<br />
  9. 9. Media Access Control Address<br />Burned in address (BIA) on network interface cards (NIC)<br />48-bit address or 12 hexadecimal digits<br />Example 12-34-56-78-9A-BC <br />First 6 digits identify manufacturer<br />Last 6 digits identify device<br />Switches use to filter data<br />Other Names<br />Adapter Address<br />Physical Address<br />Hardware Address<br />MAC Addresses<br />
  10. 10. Every device has one assigned<br />IPv4<br />32-bit dotted decimal notation<br />Example –<br />IPv6<br />128-bit address<br />Example – fe80::c0ae:e644:7ea4:a3e5<br />Divided into Network & Host portion<br />Network = street<br />Host = house<br />Hierarchical<br />IANA – Internet Assigned Numbers Authority –<br />IP Addresses<br />
  11. 11. Class A<br />Large, global networks<br />First octet ranges from1-127<br />Class B<br />Medium-sized networks<br />First octet ranges 128-191<br />Class C<br />Small networks<br />First octet ranges 192-223<br />Class D –Multicast purposes<br />Class E - Experimental purposes<br />IP Address Classes<br />
  12. 12. Shortage of Public IP addresses<br />Reserved for private use by anyone<br />Not routable across Internet<br />These addresses will be translated to a public IP address before forwarding.<br />Class A<br /> -<br />Class B <br /> -<br />Class C <br /> -<br />Private IP Addresses<br />
  13. 13. Integrated Services Router<br />Access Point<br />Router<br />Switch<br />
  14. 14. Wireless Standards<br />
  15. 15. Open<br />Everyone has access<br />PSK (Pre-shared keys)<br />One-way authentication which aligns host to the Access Point (AP)<br />EAP ( extensible authentication protocol)<br />Two-way authentication<br />Wireless Authentication<br />
  16. 16. WEP (Wired Equivalency Protocol)<br />Pre-configured keys<br />64 bits or 128 bits long <br />Passphrase option – static key<br />Change key frequently<br />WPA (Wi-Fi Protected Access)<br />New, dynamic keys<br />64 bits to 256 bits<br />More secure – harder to break<br />Wireless Encryption<br />