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Basic Concepts of ComputerNetworks and Communications      Network Topology                       Presented by-           ...
Presentation Contents   Definition of Computer Networks   Different Network Methods   LAN   Network Topologies   Summ...
Computer NetworksDefinition: Computer networking is the engineering decipline  concerned with the communication between c...
Different Network MethodsDifferent Network Methods are:   Local area network (LAN),   Metropolitan area network (MAN)  ...
Local Area Network (LAN)Local Area Network(LAN), which is usually a small network  constrained to a small geographic area...
DEFINITION       What is a Topology ? The physical topology of a networkrefers to the configuration of cables, computers a...
TYPES OF NETWORK TOPOLOGYThree commonly used network topologiesare:-      Bus Topology    Ring Topology    Star Topology
BUS TOPOLOGYAll computers and devicesconnected to central cable or bus.Consists of a main run of cablewith a terminator at...
BUS TOPOLOGY
RING TOPOLOGYCable forms closed ring or loop,with all computers and devicesarranged along ring.Data travels from device to...
RING TOPOLOGY
STAR TOPOLOGYAll devices connect to acentral device, calledhub.All data transferredfrom one computer toanother passes thro...
STAR TOPOLOGY
STAR TOPOLOGY
MESH TOPOLOGY   In the mesh topology each computer are connected with each other by    separate cable. Create point to po...
DIFFERENTIATION BETWEEN THE THREE       TYPES OF NETWORK TOPOLOGYWHAT ARE THE ADVANTAGES AND DISADVANTAGES OF THE THREE   ...
SUMMARY                      BUS TOPOLOGYDEFINITION           ADVANTAGE               DISADVANTAGE•All computers    •Easy ...
SUMMARY                         RING TOPOLOGY                        ADVANTAGE                  DISADVANTAGE DEFINITION   ...
SUMMARY                        STAR TOPOLOGYDEFINITION            ADVANTAGE                DISADVANTAGE                   ...
SUMMARY                              MESH TOPOLOGY DEFINITION               ADVANTAGE               DISADVANTAGE          ...
Basic concepts of computer Networking
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Basic concepts of computer Networking

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Basic concepts of computer Networking

  1. 1. Basic Concepts of ComputerNetworks and Communications Network Topology Presented by- Company Hassan Jan Habib  LOGO BS (1st Semester)
  2. 2. Presentation Contents Definition of Computer Networks Different Network Methods LAN Network Topologies Summary
  3. 3. Computer NetworksDefinition: Computer networking is the engineering decipline concerned with the communication between computer systems or devices. A computer network is any set of computers or devices connected to each other with the ability to exchange data.
  4. 4. Different Network MethodsDifferent Network Methods are: Local area network (LAN), Metropolitan area network (MAN) Wide area network (WAN) Wireless LANs and WANs
  5. 5. Local Area Network (LAN)Local Area Network(LAN), which is usually a small network constrained to a small geographic area. An example of a LAN would be a computer network within a building.
  6. 6. DEFINITION What is a Topology ? The physical topology of a networkrefers to the configuration of cables, computers and other peripherals.
  7. 7. TYPES OF NETWORK TOPOLOGYThree commonly used network topologiesare:- Bus Topology Ring Topology Star Topology
  8. 8. BUS TOPOLOGYAll computers and devicesconnected to central cable or bus.Consists of a main run of cablewith a terminator at each end.Popular on LANs because theyare inexpensive and easy toinstall.
  9. 9. BUS TOPOLOGY
  10. 10. RING TOPOLOGYCable forms closed ring or loop,with all computers and devicesarranged along ring.Data travels from device todevice around entire ring, inone direction.Primarily is used for LANs,but also is used in WANs.
  11. 11. RING TOPOLOGY
  12. 12. STAR TOPOLOGYAll devices connect to acentral device, calledhub.All data transferredfrom one computer toanother passes throughhub.
  13. 13. STAR TOPOLOGY
  14. 14. STAR TOPOLOGY
  15. 15. MESH TOPOLOGY In the mesh topology each computer are connected with each other by separate cable. Create point to point connection to every device on network. If one cable fail data always has alternative path to get to its destination. On a large scale, you can connect multiple LANs using mesh topology with leased line. This type topology generally use in military area.
  16. 16. DIFFERENTIATION BETWEEN THE THREE TYPES OF NETWORK TOPOLOGYWHAT ARE THE ADVANTAGES AND DISADVANTAGES OF THE THREE OF NETWORK TOPOLOGY?
  17. 17. SUMMARY BUS TOPOLOGYDEFINITION ADVANTAGE DISADVANTAGE•All computers •Easy to connect a •Entire network shuts and devices computer or down if connected to peripheral to a linear there is a break in the central cable bus. main cable. •Requires less cable •Terminators are length than required at both a star topology. ends of the backbone cable. •Difficult to identify the problem if the entire network shuts down.
  18. 18. SUMMARY RING TOPOLOGY ADVANTAGE DISADVANTAGE DEFINITION •Data is quickly •Cable forms •Data packets must pass transferred without a closed ring or through every computer ‘bottle neck’. loop, with all between the sender and computers and •The transmission of recipient therefore, thisdevices arranged data is relatively makes it slower. along ring. simple as packets travel in one direction •If any of the nodes fail only. then the ring is broken and data cannot be transmitted successfully. •It is difficult to troubleshoot the ring.
  19. 19. SUMMARY STAR TOPOLOGYDEFINITION ADVANTAGE DISADVANTAGE •Requires more cable •All devices •Easy to install and length connect to a wire. than a linear topology.central device, •Security can be If the hub or called hub. implemented concentrator fails, in the hub/switch. nodes attached are •Easy to detect faults disabled. and to More expensive than remove parts linear bus topologies because of the cost of the concentrators.
  20. 20. SUMMARY MESH TOPOLOGY DEFINITION ADVANTAGE DISADVANTAGE Require more cable •In the mesh •1.Provide redundant then other topology . topology each path between device.. computer are1.Provide redundant path between device. connected with The network can be Complicated each other by expanded without implementations. separate cable.. disruption to current user..

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