Computing - Networks


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Computing - Networks

  1. 1. VOCATIONAL EDUCATION COMPUTING<br />Week 5 - Computer Networks<br />
  2. 2. COMPUTER NETWORKS<br />A computer network is any set of computers or devices connected to each other. <br />Why do we use networks?<br /><ul><li>Communication
  3. 3. Sharing data
  4. 4. Sharing hardware</li></li></ul><li>WHAT CAN WE DO ON A NETWORK<br />Send emails.<br />Can you think of 5 more things we can do on a network?<br />
  5. 5. WHAT CAN WE DO ON A NETWORK?<br />You can play a CD music from one computer while sitting on another computer<br />You may have a computer that doesn’t have a DVD player. In this case, you can place a movie DVD on the computer that has a DVD player, and then view the movie on a computer that lacks a DVD player<br />You can connect a printer to one computer and let other computers of the network print to that printer<br />You can place a CD with pictures on one computer and let other computers access those pictures<br />
  6. 6. TYPES OF COMPUTER NETWORKS<br />PAN<br />LAN<br />CAN<br />MAN<br />WAN<br />Research Activity:<br />Spend 10 minutes on the internet and find out what these different type of networks do.<br />
  7. 7. A PERSONAL AREA NETWORK (PAN)<br />A personal area network (PAN) is a computer network used for communication among computer devices (including telephones and personal digital assistants) close to one person. The reach of a PAN is typically a few meters. <br />Personal area networks may be wired with technology such as USB and FireWire. A wireless personal area network (WPAN) can also be made possible with network technologies such as Bluetooth.<br />
  9. 9. LOCAL AREA NETWORK (LAN)<br />A network covering a small geographic area, like a home, office, or building. <br />Usually have a very high data transfer rate.<br />Larger than a WAN, will include a few PCs or laptops.<br />Can use Wireless but usually Ethernet technology. Satree uses Ethernet technology.<br />
  11. 11. CAMPUS AREA NETWORK (CAN)<br />A network that connects two or more LANs but that is limited to a specific (possibly private) geographical area such as a college campus, industrial complex, or a military base. <br />A CAN, may be considered a type of MAN (metropolitan area network), but is generally limited to an area that is smaller than a typical MAN.<br />
  12. 12. METROPOLITAN AREA NETWORK (MAN)<br />A network that connects two or more Local Area Networks or CANs together but does not extend beyond the boundaries of the immediate town, city, or metropolitan area.<br />Multiple routers, switches & hubs are connected to create a MAN<br />Phuket net is an example of a MAN.<br />
  13. 13. WIDE AREA NETWORK (WAN)<br />A WAN is a data communications network that covers a relatively broad geographic area for example one country to another or one continent to another continent. <br />Often uses transmission facilities provided by common carriers, such as telephone companies.<br />The Internet is a WAN.<br />
  14. 14. NETWORK HUBS<br />A device used to connect a PC to a Network.<br />The function of a hub is to direct information around the network, allowing communication between all connected devices.<br />Printers, computers and all other network devices are connected through a hub.<br />
  15. 15. NETWORK SWITCHES<br />A more advanced version of a hub, often called a ‘smart hub’.<br />Provide better performance, meaning the network runs faster.<br />Switches are replacing the hub in most new networks.<br />
  16. 16. NETWORK ROUTERS<br />Routers connect networks together and work out the best path for information or data to travel. <br />When you send information on the internet, for example an email, the router will choose the direction that the information will travel in order to reach its destination.<br />
  17. 17. WIRELESS NETWORKS<br />Wi-Fi is a commonly used wireless network in computer systems which enable connection to the internet or other machines that have Wi-Fi functionalities. Wi-Fi networks broadcast radio waves that can be picked up by Wi-Fi receivers that are attached to different computers.<br />Allow laptop users to easily and quickly join a business or personal network.<br />Most modern laptops have Wi-Fi cards built in to enable internet access from anywhere that has a Wi-Fi network.<br />
  18. 18. SATREE PHUKET SCHOOL<br />The network in the school is a CAN, Campus Area Network.<br />There are separate LANs in different buildings in the school.<br />The computers are connected together with Network Switches using Ethernet technology.<br />The LANs are connected together using Network Routers. For example the Network in building 4 is connected to Network in building 7 via a Network Router.<br />
  19. 19. TASK TODAY - PRE MID TERM PROJECT<br />A new school in Phuket has decided they need computers and a network in their school.<br />First you must tell them WHY they need a network at a school. Then…<br />How many computers do you think they need? Why?<br />What hardware and software would they need? Why?<br />Which network would be the best? LAN, WAN, PAN? Why?<br />Draw a simple diagram of how their network would look.<br />
  20. 20. TASK TODAY - PRE MID TERM PROJECT<br />The school details:<br />Banana Leaf School Phuket<br />4 large buildings with classrooms - 20 rooms in each building<br />1000 students - 30 classes<br />1 building for teachers - about 70 teachers<br />Use the Internet for research.<br />Complete a Microsoft PowerPoint document.<br />You will be presenting at the BEGINNING of next lesson. Your presentation will be graded.<br />