1. NetworkingInstalling, Securing, & Administering 240:237 - Coordinating Technology in an Educational Setting April 8, 2010

2. NetworkingMedia

3. Devices LAN (Local Area Network) WAN (Wide Area Network)

4. LAN Devices Hubs Switches Clean up electrical signals Multiple ports Extends network size Increases the size of the collision domain Forwards all traffic to everyone Unmanaged Clean up electrical signals Multiple ports Extends network size Reduces the size of the collision domain Filters traffic based upon MAC addresses Unmanaged and managed

5. Hub Switch

6. Determines best path for data delivery Use IP addresses to determine network location Configuration Command Line Interface - CLI Graphical User Interface – GUI WAN Devices - Routers

7. Routers

8. Addressing MAC Addresses IPv4 vs IPv6 Classes Private Addressing

9. Media Access Control Address Burned in address (BIA) on network interface cards (NIC) 48-bit address or 12 hexadecimal digits Example 12-34-56-78-9A-BC First 6 digits identify manufacturer Last 6 digits identify device Switches use to filter data Other Names Adapter Address Physical Address Hardware Address MAC Addresses

10. Every device has one assigned IPv4 32-bit dotted decimal notation Example – 192.250.23.6 IPv6 128-bit address Example – fe80::c0ae:e644:7ea4:a3e5 Divided into Network & Host portion Network = street Host = house Hierarchical IANA – Internet Assigned Numbers Authority – www.iana.org IP Addresses

11. Class A Large, global networks First octet ranges from1-127 Class B Medium-sized networks First octet ranges 128-191 Class C Small networks First octet ranges 192-223 Class D –Multicast purposes Class E - Experimental purposes IP Address Classes

12. Shortage of Public IP addresses Reserved for private use by anyone Not routable across Internet These addresses will be translated to a public IP address before forwarding. Class A 10.0.0.0 - 10.255.255.255 Class B 172.16.0.0 - 172.31.255.255 Class C 192.168.0.0 - 192.168.255.255 Private IP Addresses

13. Integrated Services Router Access Point Router Switch

14. Wireless Standards

15. Open Everyone has access PSK (Pre-shared keys) One-way authentication which aligns host to the Access Point (AP) EAP ( extensible authentication protocol) Two-way authentication Wireless Authentication

16. WEP (Wired Equivalency Protocol) Pre-configured keys 64 bits or 128 bits long Passphrase option – static key Change key frequently WPA (Wi-Fi Protected Access) New, dynamic keys 64 bits to 256 bits More secure – harder to break Wireless Encryption