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Basic Networking for teachers

Basic Networking for teachers. What is a Network?. Local Area Network (LAN) Wide Area Network (WAN ) (The Internet). Advantages of Installing a School Network. Speed . Cost . Security . Centralized Software Management . Resource Sharing . Electronic Mail . Flexible Access .

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Basic Networking for teachers

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  1. Basic Networking for teachers

  2. What is a Network? • Local Area Network (LAN) • Wide Area Network (WAN) (The Internet)

  3. Advantages of Installing a School Network • Speed. • Cost. • Security. • Centralized Software Management. • Resource Sharing. • Electronic Mail. • Flexible Access. • Workgroup Computing.

  4. Disadvantages of Installing a School Network • Cost to Install (time and money). • Requires Administrative Time. • File Server May Fail. • Cables May Break.

  5. What is a Protocol? • Ethernet • LocalTalk

  6. Protocol Summary

  7. What is Networking Hardware? • File Servers • Workstations • Network Interface Cards • Switches • Repeaters • Bridges • Routers

  8. LocalTalk Connectors

  9. Switch • Usually configured with 8, 12, or 24 RJ-45 ports • Often used in a star or star-wired ring topology • Sold with specialized software for port management • Also called hubs • Usually installed in a standardized metal rack that also may store routers

  10. Routers • Connect you to the Internet • Direct signal traffic efficiently • Route messages between any two protocols • Route messages between linear bus, star, and star-wired ring topologies • Route messages across fiber optic, coaxial, and twisted-pair cabling

  11. What is Network Cabling? • Unshielded Twisted Pair (UTP) Cable • Shielded Twisted Pair (STP) Cable • Coaxial Cable • Fiber Optic Cable • Wireless LANs • Cable Installation Guides

  12. Unshielded Twisted Pair (UTP) Cable

  13. Coaxial Cable

  14. Ethernet Cable Summary

  15. Wireless LANs

  16. Installing Cable - Some Guidelines • Always use more cable than you need. Leave plenty of slack. • Test every part of a network as you install it. Even if it is brand new, it may have problems that will be difficult to isolate later. • Stay at least 3 feet away from fluorescent light boxes and other sources of electrical interference. • If it is necessary to run cable across the floor, cover the cable with cable protectors. • Label both ends of each cable. • Use cable ties (not tape) to keep cables in the same location together.

  17. What is a Network Operating System? • Peer-to-Peer • Client/Server

  18. Peer-to-Peer

  19. Pros and Cons Advantages of a peer-to-peer network: Disadvantages of a peer-to-peer network: • Less initial expense - No need for a dedicated server. • Setup - An operating system (such as Windows XP) already in place may only need to be reconfigured for peer-to-peer operations. • Decentralized - No central repository for files and applications. • Security - Does not provide the security available on a client/server network.

  20. Client/Server

  21. Pros and Cons Advantages of a client/server network: Disadvantages of a client/server network: • Centralized - Resources and data security are controlled through the server. • Scalability - Any or all elements can be replaced individually as needs increase. • Flexibility - New technology can be easily integrated into system. • Interoperability - All components (client/network/server) work together. • Accessibility - Server can be accessed remotely and across multiple platforms. • Expense - Requires initial investment in dedicated server. • Maintenance - Large networks will require a staff to ensure efficient operation. • Dependence - When server goes down, operations will cease across the network.

  22. Examples of network operating systems • AppleShare • Microsoft Windows Server • Novell Netware • Linux • If you have old PC’s Then go with the K12LTSP(K12 Linux Terminal Server Project) • http://www.k12ltsp.org/contents.html

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