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Objectives <ul><li>Identify the components of a network </li></ul><ul><li>State the difference between a local area networ...
2.1 What is a Network? Simple Definition: It is where computers or devices exchange data with one another. Another definit...
2.2 Components of a Network? A network is simply a group of devices that are inter-connected.  Some examples of these devi...
2.2 Components of a Network? The function of a network is to pass information between devices that are connected. The netw...
2.2 Components of a Network? Network  Interface Cards <ul><li>It provides a connection between the network cable and the c...
Hub 2.2 Components of a Network? <ul><li>The hub plays a role in connecting different computers together. </li></ul><ul><l...
2.2 Components of a Network? Cables <ul><li>Network cables are used to connect the computers and devices together. </li></...
2.3 Types of Networks <ul><li>Local Area Network (LAN) </li></ul><ul><ul><li>Usually confined to a small geographical area...
2.2 The Internet Definition: It is a system of networks that are linked worldwide and facilitate data and communication se...
2.2 The Internet Definition: It is a network that contains Internet-type tools, but available only within an organisation....
<ul><li>A network allows computers or devices to exchange data with one another. </li></ul><ul><li>LAN, MAN, WAN  </li></ul>
<ul><li>The Internet is a system of networks that is linked worldwide and facilitates data communication services  </li></...
<ul><li>A network is a collection of devices used to share information and resources. </li></ul><ul><li>There are 3 type o...
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Computer Network

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Transcript of "Computer Network"

  1. 1. Objectives <ul><li>Identify the components of a network </li></ul><ul><li>State the difference between a local area network (LAN) and a wide area network (WAN) </li></ul><ul><li>State that computers in a network can share information and resources such as documents, databases, software and Printers </li></ul><ul><li>State that computers in different locations in the world are linked together to form a global network — the Internet </li></ul>
  2. 2. 2.1 What is a Network? Simple Definition: It is where computers or devices exchange data with one another. Another definition: It is any collection of independent computers or devices that communicate with one another over a shared network medium.
  3. 3. 2.2 Components of a Network? A network is simply a group of devices that are inter-connected. Some examples of these devices are: • Computers • Scanners • Printers • Modems
  4. 4. 2.2 Components of a Network? The function of a network is to pass information between devices that are connected. The network may be formed by using: • Copper cables • Radio waves • Fibre-optic cables • Infra-red rays Share printers and servers Share resources Share files and documents Share information E-mail, chat Communicate Examples Purpose
  5. 5. 2.2 Components of a Network? Network Interface Cards <ul><li>It provides a connection between the network cable and the computer. </li></ul><ul><li>There are also other types of devices that your computer uses to connect to a network. </li></ul><ul><li>E.g. USB (Universal Serial Bus) modem, or a USB wireless network device. </li></ul>Network Interface Card USB modem USB wireless network device
  6. 6. Hub 2.2 Components of a Network? <ul><li>The hub plays a role in connecting different computers together. </li></ul><ul><li>All members of the network share the same media to transmit data onto a single network. This means that each member will only get a percentage of the available network bandwidth. </li></ul><ul><li>Bandwidth is the maximum amount </li></ul><ul><li>of data that can be transmitted along </li></ul><ul><li>a channel in one second. </li></ul>hub
  7. 7. 2.2 Components of a Network? Cables <ul><li>Network cables are used to connect the computers and devices together. </li></ul><ul><li>These cables carry the data that is sent in the network. </li></ul>Cables
  8. 8. 2.3 Types of Networks <ul><li>Local Area Network (LAN) </li></ul><ul><ul><li>Usually confined to a small geographical area </li></ul></ul><ul><ul><li>Can be small (linking as few as 3 computers) or large (linking as many as a hundred computers) </li></ul></ul><ul><li>Metropolitan Area Network (MAN) </li></ul><ul><ul><li>Connects 2 or more LANs </li></ul></ul><ul><ul><li>Usually covers an entire metropolitan area (E.g. a large city and its suburbs) </li></ul></ul><ul><li>Wide Area Network (WAN) </li></ul><ul><ul><li>Connects multiple LANs and MANs that are located in different places </li></ul></ul><ul><ul><li>WANs can be created by connecting different LANs and MANs using data services (E.g. leased phone lines, dial-up phone lines, etc.) </li></ul></ul>
  9. 9. 2.2 The Internet Definition: It is a system of networks that are linked worldwide and facilitate data and communication services. Examples of communication services include file transfer, electronic mail (E-mail) and World Wide Web. Internet
  10. 10. 2.2 The Internet Definition: It is a network that contains Internet-type tools, but available only within an organisation. Intranet
  11. 11. <ul><li>A network allows computers or devices to exchange data with one another. </li></ul><ul><li>LAN, MAN, WAN </li></ul>
  12. 12. <ul><li>The Internet is a system of networks that is linked worldwide and facilitates data communication services </li></ul>Requires data services to connect Does not matter Very large area WAN - Does not matter Large area MAN - Does not matter Small area LAN Other difference Number of users Geographical area 3.
  13. 13. <ul><li>A network is a collection of devices used to share information and resources. </li></ul><ul><li>There are 3 type of network: Local Area Network (LAN), Metreopolitan Area (MAN) and Wide Area Network (WAN). </li></ul><ul><li>The Internet is a network of computers at different locations around the world. </li></ul><ul><li>An intranet is a computer network within an organisation. It is like an internal Internet. </li></ul>Summary
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