Building Your Own LAN CONNECTING TO THE WORLD

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  • 1. Building Your Own LAN CONNECTING TO THE WORLD
  • 2. How to create a LAN
    • Connect the hardware together
    • Install software and “protocols”
    • III. Install “services”
    • IV. Set up files to share between computers
  • 3. I. Hardware to connect
    • Computers with NIC cards in them
      • Now the NIC is often on the motherboard
    • Cables
    • Hub or Switch
      • What could the downside of using a hub be?
      • Which is faster a switch or a hub?
      • Which is more secure a switch or a hub?
    • Router
      • Usually your gateway to your ISP and the Internet
  • 4. Key hardware
    • What are the following?:
    • Hub (unsophisticated, rebroadcasts everything from your computer to everyone on the same hub)
    • Switch (like a hub but only broadcasts to where it should go—it filters and forwards)
    • 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)
  • 5. II. INSTALL SOFTWARE & PROTOCOLS
    • Suitable operating system software for networks such as
      • Windows XP (workstation)
      • Server (Windows 2003 Server)
      • NOS (Windows 2003 Enterprise) Protocol is the common data communication language between computers.
    • Protocol determines the following:
      • the type of error checking to be used
      • data compression method, if any
      • how the sending device will indicate that it has finished sending a message
      • how the receiving device will indicate that it has received a message
  • 6. KEY PROTOCOLS
    • NETBEUI
      • 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.
      • DOES NOT require special configuration
    • TCP/IP
      • TCP/IP is the primary Internet protocol
      • 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.
      • DOES require some configuration
  • 7. III. INSTALL SERVICES (FUNCTIONALITY)
    • For example: file and print sharing, FTP, Web, etc.
  • 8. IV. Set up what you want to share
    • WORKGROUPS
    • RESOURCES TO SHARE
      • SELECT A FOLDER
    • ACCESS LEVEL (PERMISSIONS)
      • FULL ACCESS
      • CHANGES
      • READ ONLY
  • 9. Networking Activities
  • 10. #1 Crossover Cable The most simple connection
      • For transferring data from one machine to another when not on a LAN (perhaps an old hard drive to a new one)
      • Playing games without a hub (outside or in a car)
    Note: “White w. Orange” means White with Orange Stripe More on cables
  • 11. #1 Crossover Cable Instructions
    • I. Hardware
      • Plug crossover cable into NICs of both machines
    • II. Software and Protocols (assuming XP)
      • On each machine configure TCP/IP
        • Start  Control Panel  Network Connections
          • Or right click on “My Network Places” and select properties
        • Right clink on “Local Area Connection” and select properties
        • Make sure your NIC card is showing
        • Select “Internet Protocol (TCP/IP)” or install if necessary
        • Click on Properties [Note: discuss briefly getting IP address automatically from a DHCP server]
        • Select “Use the following IP address” and type in the following
          • IP Address: 10.1.1.1 for one machine and 10.1.1.2 for the other
          • Subnet Mask: 255.255.255.0 for both machines
          • Click “OK” (gateway is not needed as we have no Internet connection)
  • 12. #1 Crossover Cable Instructions
    • III. Services
      • File and Printer Sharing for Microsoft Networks is installed by default on XP.
      • Get in the same workgroup
        • Right-click on My Computer and select properties. Select the Computer Name tab. Left-click on the properties button.
        • Make sure the workgroup names are identical. Use Change button toward the bottom of the current window if necessary.
  • 13.
    • IV. Files to share
      • Right-click on a folder you wish to share. Then left-click on the Sharing and Security selection.
      • Check the “Share this file on the network” box.
      • 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.
    • Go to “My Network Places” and enjoy your workgroup resources!
    #1 Crossover Cable Instructions
  • 14. #2 Hub or Switch
    • Exactly the same as #1, except regular straight-through cables are plugged between the NIC cards and the hub or switch.
  • 15. Networks for Your Home
    • Wired option – install a router and CAT5 Twisted-pair cable through your house
    • “No-New-Wires” for a home network
      • Wireless (Wi-Fi) – Wireless router and PC Cards
        • Set secure login and encrypt transmissions!
      • HomePlug – House AC electrical wires
      • HomePNA – House phone wires
  • 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. #3 Add a HomePlug Connection
      • Plug HomePlug adapter into electrical outlets.
        • no power box or strip can be in between
      • Plug straight through cables into adapter box.
      • Watch for blinking lights indicating there is a connection.
  • 18. Wireless Networks
    • Range 100 – 500 ft.
      • Can be limited by walls, metal, people
    • Throughput 1 – 11 Mbps.
    • Benefits
      • User mobility
      • Installation speed & flexibility
      • Scalability
  • 19. Your Gateway
    • The gateway connecting your home LAN to the Internet is normally done through a
      • dial-up modem
      • DSL router/modem
      • Cable router/modem
  • 20. #4 Remote Desktop
    • 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)!
  • 21. #4 Remote Desktop
    • Set your computer to allow remote access.
      • Right click on “My Computer” and select properties  “Remote” tab  check “Allow others to connect remotely to this computer”  ”OK”
        • Notes: (1) You must have an administrator account unless you specifically “Select Remote Users”
        • (2) You must have a static IP address or know what the current IP address is for this machine
        • (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”
    • Connect remotely to the machine
      • Start  All Programs  Accessories  Communications  Remote Desktop Connection
  • 22. #4 Remote Desktop
    • You may also
      • Print remotely or to your local printer
      • Copy and past files between your remote desktop and your local machine
    • Directions: when connecting click “Options>>”
      • On the “Local “Resources” tab check “disk drives” and “printers”
      • Then “Connect”
  • 23. #5 Testing Connectivity
    • Ping
    • Tracert (trace route)
    • IPCONFIG (to get your IP address)
    Demo at DOS prompt with Internet connection To get DOS prompt: Start->Run->”cmd” (enter)
  • 24. #7 Visual Traces
    • Visually trace
      • How many hops to favorite URLs
      • Where fraudulant junkmail is coming from and report it
      • Who owns a particular IP address
    • Some free trial products include
      • VisualRoute
      • Visual WhoIs
      • Aet_Tracer
  • 25. #8 Voice over IP
    • Talk to family and friends across the country or across the world free .
      • They must also have a computer running the same VoIP program
    • Possible free software includes Skype
      • Download it at http:// www.skype.com/helloagain.html