Basic networking


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Networking Concepts

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Basic networking

  1. 1. Mr.Khan 1
  2. 2. Topic of Presentation 2 Mr.Khan
  3. 3.  Contents What is network? Uses of networks History of networking Types 0f networking How networks are structured? Network Topologies Network Protocols 3Mr.Khan
  4. 4. Networking:-____”When two or more computers connected to each other through some communication media is called Networking.____” 4 Mr.Khan
  5. 5. for example:- 5 Mr.Khan
  6. 6. History of networking:- Over the five decades that Unisys has been involved in the computer industry, it has participated in the development of networking technologies while working under contract for the Department of Defense (DOD) and other government agencies and in the course of developing its commercial product offerings. During this time Unisys has made several significant technical contributions furthering the development of networking in the industry at large. 6 Mr.Khan
  7. 7. Why Networking?Sharing information — i.e. data communication  Like this Mr.Khan 7
  8. 8. Uses of networks:- Network allows user to share program and data simultaneously. Network allows users to share peripheral devices. Network allows user to share email through network. 8 Mr.Khan
  9. 9. Example 9 Mr.Khan
  10. 10. Types of networks Local Area Network(LANs) Wide Area Network (WANs) Metropolitan Area Network(MANs) Campus Area Network(CANs) Home Area Network(HANs) Intranet and Extranet 10 Mr.Khan
  11. 11. Local Area network Its is digital communication system capable of interconnecting a large number of computer terminals and devices with in a limited area. Its speed is faster than WANs. But is small in covering area. 11 Mr.Khan
  12. 12. For example 12 Mr.Khan
  13. 13. Wide area network Its is digital communication system capable of interconnecting a large number of computer terminals and devices through different cities. Its is slower than WAN. 13 Mr.Khan
  14. 14. For example 14 Mr.Khan
  15. 15. Metropolitan areanetwork A MANs connect a geographical area larger than LAN but LESS than WAN such as city with dedicated or high performance hardware. Mobile phones system based on MANs. 15 Mr.Khan
  16. 16. For example 16 Mr.Khan
  17. 17. Campus Area Network A CANs follow the same principle as LANs work. With a CAN different campus offices and organization can be linked together. 17 Mr.Khan
  18. 18. For example 18 Mr.Khan
  19. 19. Home area network A home network (HANs) is a network contained a person’s digital devices from multiple computer and devices such as Printer Telephones DVDs 19 Mr.Khan
  20. 20. For example 20 Mr.Khan
  21. 21. Intranet and extranet Its is privately own-secure business network based on internet technology not necessarily to the internet. Information is available to all employees. 21 Mr.Khan
  22. 22. Extranet Its combination of multiple intranets. Intranets of different companies are connected each other to share data and information. 22 Mr.Khan
  23. 23. Extranet 23 Mr.Khan
  24. 24. Intranet 24 Mr.Khan
  25. 25. How network are structured ? Following are the ways to form a network. Client/server Networks. Peer to Peer Networks. Hybrid Network. 25 Mr.Khan
  26. 26. Client/server Networks Inthis type of network one or more computer are dedicated server and the remaining computer works as client. The client are all other computers on the network. 26 Mr.Khan
  27. 27. advantages• Advantages of client/server networks • Facilitate resource sharing – centrally administrate and control • Facilitate system backup and improve fault tolerance • Enhance security – only administrator can have access to Server 27 Mr.Khan
  28. 28. Disadvantages• Disadvantages of client/server networks • High cost for Servers • Need expert to configure the network • Introduce a single point of failure to the system 28 Mr.Khan
  29. 29. For example 29 Mr.Khan
  30. 30. Peer to peer network In this network every computer plays a role of server or client depending upon the nature of communication . All computers have equal rights. No one computer can control over other computer. 30 Mr.Khan
  31. 31. advantages• Advantages of peer-to-peer networks: • Low cost • Simple to configure • User has full accessibility of the computer Mr.Khan 31
  32. 32. Disadvantages of peer-to-peero May have duplication in resources Difficult to uphold security policy Difficult to handle uneven loading Mr.Khan 32
  33. 33. For example 33 Mr.Khan
  34. 34. Hybrid network Ithas the combined feature of both client and peer to peer networks The user take advantage of both networks. 34 Mr.Khan
  35. 35. advantages Its provide both the facility of peer to peer model and client server modelDISADVANTAGE Hard ware cost . Maintenance. 35 Mr.Khan
  36. 36. For example 36 Mr.Khan
  37. 37. Network topologies ____” The scheme of joining computer in a network is called topology___” 37 Mr.Khan
  38. 38. Types of topologies Bus Topology Ring Topology Star Topology Tree Topology Mesh Topology 38 Mr.Khan
  39. 39. Bus Topology In bus topology all the computer are connected in the series with a common communication medium. The communication medium is called BUS. Bus is used in LAN because It is To installed. If the one node of bus fail then the whole network will be destroy. 39 Mr.Khan
  40. 40. For example 40 Mr.Khan
  41. 41. Ring topology In ring topology every device has exactly two neighbor for communication purpose and the last computer is connected to the first computer all the computer are connected in ring shape. A failure in cable or a device breaks the loop and the entire network fails. 41 Mr.Khan
  42. 42. For example 42 Mr.Khan
  43. 43. Star topology All the computer are connected to central HUB OR Switch. Twisted pair cable is used in star topology. Its is mostly use in LAN because it is easy to maintain . If the HUB or SWITCH or fail then entire network becomes fail. 43 Mr.Khan
  44. 44. For example 44 Mr.Khan
  45. 45. Tree topology Tree topology integrates the multiple star topologies together on to a bus all the computer are connected in such a way to form tree like structure. It has combined feature of STAR and BUS topology. It is difficult to configure. 45 Mr.Khan
  46. 46. For example 46 Mr.Khan
  47. 47. Mesh topology In mesh topology every computer directly connected to every other computer on the network. Mesh topology used in WAN. The installation of mesh topology is difficult. Its performance is not affected with the heavy transmission of data. 47 Mr.Khan
  48. 48. For example 48 Mr.Khan
  49. 49. Protocols Protocols are the rules to exchange data between two devices.Types of Protocols: Ethernet Token Ring ARCnet DSL TCP/IP 49 Mr.Khan
  50. 50. Ethernet Its is most commonly used in LAN protocols. Ethernet is used in BUS topology with high speed network cable. It is relatively simple and cheaper. All the computer in Ethernet using same cable to send or receive data. 50 Mr.Khan
  51. 51. Ethernet cable Ethernet converter 51 Mr.Khan
  52. 52. Token ring Token ring passing protocols is used in ring topology. A token is an electronic signal. The token ring is associated with IBM (international Business Machines) Which worked with the concept of ring network 52 Mr.Khan
  53. 53. Token passing technology 53 Mr.Khan
  54. 54. ARCnet Arc net stands for Attached Resource Computer Network. It used either pair or co-axial cable. The original ARCnet protocol was very slow ARCnet is inexpensive, reliable, easy to setup and easy to expand 54 Mr.Khan
  55. 55. sadadasdasdCo-axial cable Mr.Khan 55
  56. 56. TCP/IP TCP/IP stand for Transmission Control Protocol/Internet Protocol. It is WAN protocol. Two different types of computer connect each other using this protocol. TCP/IP differs for different computers. Mr.Khan 56
  57. 57. ISDN ISDN stands for Integrated Services Digital Network. ISDN modem is different from dial up modem It provides better transmission rate Mr.Khan 57
  58. 58. ISDN MODEM DAIL-UP MODEM Mr.Khan 58
  59. 59. DSL DSL stands for Digital Subscribe Line. It provides high speed transmission of data over telephone line. It is alternative of isdn modem. Its is use every where in office, homes etc. Mr.Khan 59
  60. 60. DSL MODEM Mr.Khan 60
  61. 61.  Summary of Presentation What is network? Uses of networks History of networking Types 0f networking How networks are structured? Network Topologies Network Protocols 61Mr.Khan
  62. 62. 62Mr.Khan