3.1.2 classification of network

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  • Advantages Of WAN -Messages can be sent very quickly to anyone else on the network. These messages can have pictures, sounds, or data included with them (called attachments). -Expensive things (such as printers or phone lines to the internet) can be shared by all the computers on the network without having to buy a different peripheral for each computer. -Everyone on the network can use the same data. This avoids problems where some users may have older information than others. -Share information/files over a larger area Disadvantages Of WAN -Setting up a network can be an expensive and complicated experience. The bigger the network the more expensive it is. -Security is a real issue when many different people have the ability to use information from other computers. Protection against hackers and viruses adds more complexity and expense. -Once set up, maintaining a network is a full-time job which requires network supervisors and technicians to be employed. -Information may not meet local needs or interests -Vulnerable to hackers or other outside threats
  • Advantages Of WAN -Messages can be sent very quickly to anyone else on the network. These messages can have pictures, sounds, or data included with them (called attachments). -Expensive things (such as printers or phone lines to the internet) can be shared by all the computers on the network without having to buy a different peripheral for each computer. -Everyone on the network can use the same data. This avoids problems where some users may have older information than others. -Share information/files over a larger area Disadvantages Of WAN -Setting up a network can be an expensive and complicated experience. The bigger the network the more expensive it is. -Security is a real issue when many different people have the ability to use information from other computers. Protection against hackers and viruses adds more complexity and expense. -Once set up, maintaining a network is a full-time job which requires network supervisors and technicians to be employed. -Information may not meet local needs or interests -Vulnerable to hackers or other outside threats
  • Advantages Of WAN -Messages can be sent very quickly to anyone else on the network. These messages can have pictures, sounds, or data included with them (called attachments). -Expensive things (such as printers or phone lines to the internet) can be shared by all the computers on the network without having to buy a different peripheral for each computer. -Everyone on the network can use the same data. This avoids problems where some users may have older information than others. -Share information/files over a larger area Disadvantages Of WAN -Setting up a network can be an expensive and complicated experience. The bigger the network the more expensive it is. -Security is a real issue when many different people have the ability to use information from other computers. Protection against hackers and viruses adds more complexity and expense. -Once set up, maintaining a network is a full-time job which requires network supervisors and technicians to be employed. -Information may not meet local needs or interests -Vulnerable to hackers or other outside threats
  • Advantages Of WAN -Messages can be sent very quickly to anyone else on the network. These messages can have pictures, sounds, or data included with them (called attachments). -Expensive things (such as printers or phone lines to the internet) can be shared by all the computers on the network without having to buy a different peripheral for each computer. -Everyone on the network can use the same data. This avoids problems where some users may have older information than others. -Share information/files over a larger area Disadvantages Of WAN -Setting up a network can be an expensive and complicated experience. The bigger the network the more expensive it is. -Security is a real issue when many different people have the ability to use information from other computers. Protection against hackers and viruses adds more complexity and expense. -Once set up, maintaining a network is a full-time job which requires network supervisors and technicians to be employed. -Information may not meet local needs or interests -Vulnerable to hackers or other outside threats
  • 3.1.2 classification of network

    1. 1. 3.1.2 Classification of network What Is a Network? A network is a collection of computers and devices connected together via communications devices and transmission media
    2. 2. 3.1.2 Classification of network Advantages of using a network include: • facilitating communications • sharing hardware • sharing data and information • sharing software • transferring funds.
    3. 3. 3.1.2 Classification of network
    4. 4. 3.1.2 Classification of network  The main differentiation among these classifications is their area of coverage. LAN, MAN and WAN compared
    5. 5. 3.1.2 Classification of network
    6. 6. 3.1.2 Classification of network a) LOCAL AREA NETWORK  Definition  Types of LAN:  Personal area network (PAN)  Home area network (HAN)  Advantages and Disadvantages of LAN b) METROPOLITAN AREA NETWORK  Definition  Type of MAN  Campus network  Advantages and Disadvantages of MAN c) WIDE AREA NETWORK  Definition  Types of WAN  Enterprise private network  Virtual private network  Advantages and Disadvantages of WAN
    7. 7. 3.1.2 Classification of network A local area network (LAN) is a network that connects computers and devices in a limited geographical area. Example such as a home, school computer laboratory, office building or closely positioned group of buildings.
    8. 8. 3.1.2 Classification of network The simplest form of LAN is to connect two computers together. COMPUTER COMPUTER 1 2 Switch / hub
    9. 9. 3.1.2 Classification of network A network which consists of less than 500 interconnected devices across several buildings, is still recognized as a LAN.
    10. 10. 3.1.2 Classification of network
    11. 11. 3.1.2 Classification of network A personal area network (PAN) is a computer network used for communication among computer and different information technological devices close to one person. Headphone Smartphone Laptop PDA Mouse Printer
    12. 12. 3.1.2 Classification of network Examples of devices that are used in a PAN are: ◦ Personal computers ◦ Printers ◦ Fax machines ◦ Telephones ◦ PDAs ◦ Scanners ◦ Video game consoles.
    13. 13. 3.1.2 Classification of network A wired PAN is usually constructed with USB and Fire wire connections.
    14. 14. 3.1.2 Classification of network Technologies such as Bluetooth and infrared communication typically form a wireless PAN.
    15. 15. 3.1.2 Classification of network A home area network (HAN) is a residential LAN which is used for communication between digital devices typically deployed in the home, usually a small number of personal computers and accessories, such as printers and mobile computing devices.
    16. 16. 3.1.2 Classification of network
    17. 17. 3.1.2 Classification of network An important function is the sharing of Internet access, often a broadband service through a Digital Subscriber Line (DSL) provider.
    18. 18. 3.1.2 Classification of network • Easy to share devices (printers, scanners, external drives) • Easy to share data (homework, pictures) • Cost of LAN Setup is low.
    19. 19. 3.1.2 Classification of network • Power - a good LAN is required to be on all the times. • Security - each computer and device become another point of entry for undesirables. • if all computers running at once, can reduce speed for each. • Area covered is limited
    20. 20. 3.1.2 Classification of network A metropolitan area network (MAN) is a high-speed network that connects local area networks in a metropolitan area Example such as a city or town and handles the bulk of communications activity across that region.
    21. 21. 3.1.2 Classification of network
    22. 22. 3.1.2 Classification of network A campus network is a computer network made up of an interconnection of local area networks (LANs) within a limited geographical area.
    23. 23. 3.1.2 Classification of network In the case of a university campus-based campus network, the network is likely to link a variety of campus buildings including; academic departments, the university library and student residence halls.
    24. 24. 3.1.2 Classification of network Academic Departments University Student Library Residence Halls.
    25. 25. 3.1.2 Classification of network • Efficiency and shared access. • All the computer-owning residents of the area have equal ability to go on line.
    26. 26. 3.1.2 Classification of network • It can be costly (hardware, software, support, etc.) • Security problems • As the network consists of many computers over the span of a city, the connection can lag or become quite slow.
    27. 27. 3.1.2 Classification of network A wide area network (WAN) is a network that covers a large geographic area (such as a city, country, or the world) using a communications channel that combines many types of media such as telephone lines, cables, and radio waves.
    28. 28. 3.1.2 Classification of network The Internet is the world’s largest WAN.
    29. 29. 3.1.2 Classification of network
    30. 30. 3.1.2 Classification of network An enterprise private network is a network build by an enterprise to interconnect various company sites, e.g., production sites, head offices, remote offices, shops, in order to share computer resources. Frequency Production site Band Head offices
    31. 31. 3.1.2 Classification of network Frequency BandProduction site Head offices
    32. 32. 3.1.2 Classification of network A virtual private network (VPN) is a computer network in which some of the links between nodes are carried by open connections or virtual circuits in some larger network (e.g., the Internet) instead of by physical wires.
    33. 33. 3.1.2 Classification of network VPN server
    34. 34. 3.1.2 Classification of network • Increased efficiency • Ease of communication • Lowered costs.
    35. 35. 3.1.2 Classification of network • Security problems • Training costs • Maintenance problems. Large enterprises will dedicate personnel to maintaining their WAN.
    36. 36. 3.1.2 Classification of network Network Number of Cost Speed Size computer Fastest Smallest LAN Low SmallMAN High Larger Slower Large Higher Largest Slowest LargestWAN
    37. 37. 3.1.2 Classification of network
    38. 38.  What is a network? What are three advantages of using a network? Give two types of LAN configuration. Give two types of WAN configuration. List down two of WAN disadvantages. Give two types of network communication standard in wired category. Give three types of network communication standard in wireless category.

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