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  1. 1. Building Your Own LAN CONNECTING TO THE WORLD
  2. 2. How to create a LAN <ul><li>Connect the hardware together </li></ul><ul><li>Install software and “protocols” </li></ul><ul><li>III. Install “services” </li></ul><ul><li>IV. Set up files to share between computers </li></ul>
  3. 3. I. Hardware to connect <ul><li>Computers with NIC cards in them </li></ul><ul><ul><li>Now the NIC is often on the motherboard </li></ul></ul><ul><li>Cables </li></ul><ul><li>Hub or Switch </li></ul><ul><ul><li>What could the downside of using a hub be? </li></ul></ul><ul><ul><li>Which is faster a switch or a hub? </li></ul></ul><ul><ul><li>Which is more secure a switch or a hub? </li></ul></ul><ul><li>Router </li></ul><ul><ul><li>Usually your gateway to your ISP and the Internet </li></ul></ul>
  4. 4. Key hardware <ul><li>What are the following?: </li></ul><ul><li>Hub (unsophisticated, rebroadcasts everything from your computer to everyone on the same hub) </li></ul><ul><li>Switch (like a hub but only broadcasts to where it should go—it filters and forwards) </li></ul><ul><li>Router (A device that forwards data packets along networks. A router is connected to at least two networks, commonly two LANs or WANs or a LAN and its ISP’s network. Routers are located at gateways, the places where two or more networks connect) </li></ul>
  5. 5. II. INSTALL SOFTWARE & PROTOCOLS <ul><li>Suitable operating system software for networks such as </li></ul><ul><ul><li>Windows XP (workstation) </li></ul></ul><ul><ul><li>Server (Windows 2003 Server) </li></ul></ul><ul><ul><li>NOS (Windows 2003 Enterprise) Protocol is the common data communication language between computers. </li></ul></ul><ul><li>Protocol determines the following: </li></ul><ul><ul><li>the type of error checking to be used </li></ul></ul><ul><ul><li>data compression method, if any </li></ul></ul><ul><ul><li>how the sending device will indicate that it has finished sending a message </li></ul></ul><ul><ul><li>how the receiving device will indicate that it has received a message </li></ul></ul>
  6. 6. KEY PROTOCOLS <ul><li>NETBEUI </li></ul><ul><ul><li>NetBEUI stands for NetBIOS enhanced user interface. In turn, NetBIOS stands for network basic input/output system. This is an unroutable network protocol used by DOS, Microsoft Windows and OS/2-based systems to communicate with locally-attached file servers. </li></ul></ul><ul><ul><li>DOES NOT require special configuration </li></ul></ul><ul><li>TCP/IP </li></ul><ul><ul><li>TCP/IP is the primary Internet protocol </li></ul></ul><ul><ul><li>TCP is one of the main protocols in TCP/IP networks. Whereas the IP protocol deals only with digital data packets, TCP enables two hosts to establish a connection and exchange streams of data. TCP guarantees delivery of data and also guarantees that packets will be delivered in the same order in which they were sent. </li></ul></ul><ul><ul><li>DOES require some configuration </li></ul></ul>
  7. 7. III. INSTALL SERVICES (FUNCTIONALITY) <ul><li>For example: file and print sharing, FTP, Web, etc. </li></ul>
  8. 8. IV. Set up what you want to share <ul><li>WORKGROUPS </li></ul><ul><li>RESOURCES TO SHARE </li></ul><ul><ul><li>SELECT A FOLDER </li></ul></ul><ul><li>ACCESS LEVEL (PERMISSIONS) </li></ul><ul><ul><li>FULL ACCESS </li></ul></ul><ul><ul><li>CHANGES </li></ul></ul><ul><ul><li>READ ONLY </li></ul></ul>
  9. 9. Networking Activities
  10. 10. #1 Crossover Cable The most simple connection <ul><ul><li>For transferring data from one machine to another when not on a LAN (perhaps an old hard drive to a new one) </li></ul></ul><ul><ul><li>Playing games without a hub (outside or in a car) </li></ul></ul>Note: “White w. Orange” means White with Orange Stripe More on cables
  11. 11. #1 Crossover Cable Instructions <ul><li>I. Hardware </li></ul><ul><ul><li>Plug crossover cable into NICs of both machines </li></ul></ul><ul><li>II. Software and Protocols (assuming XP) </li></ul><ul><ul><li>On each machine configure TCP/IP </li></ul></ul><ul><ul><ul><li>Start  Control Panel  Network Connections </li></ul></ul></ul><ul><ul><ul><ul><li>Or right click on “My Network Places” and select properties </li></ul></ul></ul></ul><ul><ul><ul><li>Right clink on “Local Area Connection” and select properties </li></ul></ul></ul><ul><ul><ul><li>Make sure your NIC card is showing </li></ul></ul></ul><ul><ul><ul><li>Select “Internet Protocol (TCP/IP)” or install if necessary </li></ul></ul></ul><ul><ul><ul><li>Click on Properties [Note: discuss briefly getting IP address automatically from a DHCP server] </li></ul></ul></ul><ul><ul><ul><li>Select “Use the following IP address” and type in the following </li></ul></ul></ul><ul><ul><ul><ul><li>IP Address: for one machine and for the other </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Subnet Mask: for both machines </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Click “OK” (gateway is not needed as we have no Internet connection) </li></ul></ul></ul></ul>
  12. 12. #1 Crossover Cable Instructions <ul><li>III. Services </li></ul><ul><ul><li>File and Printer Sharing for Microsoft Networks is installed by default on XP. </li></ul></ul><ul><ul><li>Get in the same workgroup </li></ul></ul><ul><ul><ul><li>Right-click on My Computer and select properties. Select the Computer Name tab. Left-click on the properties button. </li></ul></ul></ul><ul><ul><ul><li>Make sure the workgroup names are identical. Use Change button toward the bottom of the current window if necessary. </li></ul></ul></ul>
  13. 13. <ul><li>IV. Files to share </li></ul><ul><ul><li>Right-click on a folder you wish to share. Then left-click on the Sharing and Security selection. </li></ul></ul><ul><ul><li>Check the “Share this file on the network” box. </li></ul></ul><ul><ul><li>Click the Apply button and then the OK button when you have finished the information. A hand should appear under the file or folder indicating that it has share-level access. </li></ul></ul><ul><li>Go to “My Network Places” and enjoy your workgroup resources! </li></ul>#1 Crossover Cable Instructions
  14. 14. #2 Hub or Switch <ul><li>Exactly the same as #1, except regular straight-through cables are plugged between the NIC cards and the hub or switch. </li></ul>
  15. 15. Networks for Your Home <ul><li>Wired option – install a router and CAT5 Twisted-pair cable through your house </li></ul><ul><li>“No-New-Wires” for a home network </li></ul><ul><ul><li>Wireless (Wi-Fi) – Wireless router and PC Cards </li></ul></ul><ul><ul><ul><li>Set secure login and encrypt transmissions! </li></ul></ul></ul><ul><ul><li>HomePlug – House AC electrical wires </li></ul></ul><ul><ul><li>HomePNA – House phone wires </li></ul></ul>
  16. 16. Networks for Your Home $150-$180 $80-$130 $135-$150 Router/ Access Point $55-$60 $150-$180 $70-$145 USB Adapter $50-$60 n/a $70-$110 PC Card 10 14 11 Speed (mbps) HomePNA HomePlug Wi-Fi
  17. 17. #3 Add a HomePlug Connection <ul><ul><li>Plug HomePlug adapter into electrical outlets. </li></ul></ul><ul><ul><ul><li>no power box or strip can be in between </li></ul></ul></ul><ul><ul><li>Plug straight through cables into adapter box. </li></ul></ul><ul><ul><li>Watch for blinking lights indicating there is a connection. </li></ul></ul>
  18. 18. Wireless Networks <ul><li>Range 100 – 500 ft. </li></ul><ul><ul><li>Can be limited by walls, metal, people </li></ul></ul><ul><li>Throughput 1 – 11 Mbps. </li></ul><ul><li>Benefits </li></ul><ul><ul><li>User mobility </li></ul></ul><ul><ul><li>Installation speed & flexibility </li></ul></ul><ul><ul><li>Scalability </li></ul></ul>
  19. 19. Your Gateway <ul><li>The gateway connecting your home LAN to the Internet is normally done through a </li></ul><ul><ul><li>dial-up modem </li></ul></ul><ul><ul><li>DSL router/modem </li></ul></ul><ul><ul><li>Cable router/modem </li></ul></ul>
  20. 20. #4 Remote Desktop <ul><li>Remote desktop allows you to work on a computer and view the screen as though you are sitting right there even though you may be half a world away (like China)! </li></ul>
  21. 21. #4 Remote Desktop <ul><li>Set your computer to allow remote access. </li></ul><ul><ul><li>Right click on “My Computer” and select properties  “Remote” tab  check “Allow others to connect remotely to this computer”  ”OK” </li></ul></ul><ul><ul><ul><li>Notes: (1) You must have an administrator account unless you specifically “Select Remote Users” </li></ul></ul></ul><ul><ul><ul><li>(2) You must have a static IP address or know what the current IP address is for this machine </li></ul></ul></ul><ul><ul><ul><li>(3) If problems logging in then check the Firewall to make sure it is open: Start  Control Panel  Security Center  Manage security settings for “Windows Firewall”  ”Exceptions” tab  check “Remote Desktop” and “Remote Desktop In” </li></ul></ul></ul><ul><li>Connect remotely to the machine </li></ul><ul><ul><li>Start  All Programs  Accessories  Communications  Remote Desktop Connection </li></ul></ul>
  22. 22. #4 Remote Desktop <ul><li>You may also </li></ul><ul><ul><li>Print remotely or to your local printer </li></ul></ul><ul><ul><li>Copy and past files between your remote desktop and your local machine </li></ul></ul><ul><li>Directions: when connecting click “Options>>” </li></ul><ul><ul><li>On the “Local “Resources” tab check “disk drives” and “printers” </li></ul></ul><ul><ul><li>Then “Connect” </li></ul></ul>
  23. 23. #5 Testing Connectivity <ul><li>Ping </li></ul><ul><li>Tracert (trace route) </li></ul><ul><li>IPCONFIG (to get your IP address) </li></ul>Demo at DOS prompt with Internet connection To get DOS prompt: Start->Run->”cmd” (enter)
  24. 24. #7 Visual Traces <ul><li>Visually trace </li></ul><ul><ul><li>How many hops to favorite URLs </li></ul></ul><ul><ul><li>Where fraudulant junkmail is coming from and report it </li></ul></ul><ul><ul><li>Who owns a particular IP address </li></ul></ul><ul><li>Some free trial products include </li></ul><ul><ul><li>VisualRoute </li></ul></ul><ul><ul><li>Visual WhoIs </li></ul></ul><ul><ul><li>Aet_Tracer </li></ul></ul>
  25. 25. #8 Voice over IP <ul><li>Talk to family and friends across the country or across the world free . </li></ul><ul><ul><li>They must also have a computer running the same VoIP program </li></ul></ul><ul><li>Possible free software includes Skype </li></ul><ul><ul><li>Download it at http:// </li></ul></ul>