Basic concepts o computer created by:- king parmeshwar pawar ☺
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The document discusses different topics relating to computer networks and communications network topology. It defines computer networks and different network methods, including local area networks (LANs), metropolitan area networks (MANs), and wide area networks (WANs). It also describes three common network topologies: bus topology, where all devices connect to a central cable or bus; ring topology, where the cable forms a closed ring and data travels around the ring; and star topology, where all devices connect to a central hub. The advantages and disadvantages of each topology are summarized. Mesh topology is also introduced, where each device has a dedicated connection to every other device providing redundant paths.
Basic concepts o computer created by:- king parmeshwar pawar ☺
- 1. Basic ConceptsBasic Concepts ofof Computer NetworksComputer Networks andand Communications NetworkCommunications Network TopologyTopology Pr esent ed by-Pr esent ed by- Pawar ParmeshwarPawar Parmeshwar EE (3EE (3rdrd Semest erSemest er ))
- 2. Presentation Contents Definition of Computer NetworksDefinition of Computer Networks Different Network MethodsDifferent Network Methods LANLAN Network TopologiesNetwork Topologies SummarySummary
- 3. Definition: Computer networking is the engineering discipline 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. Computer Networks
- 4. Different Network Methods are: Local area network (LAN), Metropolitan area network (MAN) Wide area network (WAN) Wireless LANs and WANs Different Network Methods
- 5. 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. Local Area Network (LAN)
- 6. DEFINITION What is a Topology ? The physical topology of a network refers to the configuration of cables, computers and other peripherals.
- 7. TYPES OF NETWORK TOPOLOGY Three commonly used network topologies are:- Bus Topology Ring Topology Star Topology
- 8. BUS TOPOLOGY All computers and devices connected to central cable or bus. Consists of a main run of cable with a terminator at each end. Popular on LANs because they are inexpensive and easy to install.
- 9. BUS TOPOLOGY
- 10. RING TOPOLOGY Cable forms closed ring or loop, with all computers and devices arranged along ring. Data travels from device to device around entire ring, in one direction. Primarily is used for LANs, but also is used in WANs.
- 11. RING TOPOLOGY
- 12. STAR TOPOLOGY All devices connect to a central device, called hub. All data transferred from one computer to another passes through hub.
- 13. STAR TOPOLOGY
- 14. STAR TOPOLOGY
- 15. 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. MESH TOPOLOGY
- 16. DIFFERENTIATION BETWEEN THE THREE TYPES OF NETWORK TOPOLOGY WHAT ARE THE ADVANTAGES AND DISADVANTAGES OF THE THREE OF NETWORK TOPOLOGY?
- 17. SUMMARY BUS TOPOLOGY DEFINITION •All computers and devices connected to central cable DEFINITION •All computers and devices connected to central cable ADVANTAGE •Easy to connect a computer or peripheral to a linear bus. ADVANTAGE •Easy to connect a computer or peripheral to a linear bus. •Requires less cable length than a star topology. •Requires less cable length than a star topology. DISADVANTAGE •Entire network shuts down if there is a break in the main cable. DISADVANTAGE •Entire network shuts down if there is a break in the main cable. •Terminators are required at both ends of the backbone cable. •Terminators are required at both ends of the backbone cable. •Difficult to identify the problem if the entire network shuts down. •Difficult to identify the problem if the entire network shuts down.
- 18. SUMMARY RING TOPOLOGY DEFINITION •Cable forms closed ring or loop, with all computers and devices arranged along ring. DEFINITION •Cable forms closed ring or loop, with all computers and devices arranged along ring. ADVANTAGE •Data is quickly transferred without a ‘bottle neck’. ADVANTAGE •Data is quickly transferred without a ‘bottle neck’. •The transmission of data is relatively simple as packets travel in one direction only. •The transmission of data is relatively simple as packets travel in one direction only. DISADVANTAGE •Data packets must pass through every computer between the sender and recipient therefore, this makes it slower. DISADVANTAGE •Data packets must pass through every computer between the sender and recipient therefore, this makes it slower. •If any of the nodes fail then the ring is broken and data cannot be transmitted successfully. •If any of the nodes fail then the ring is broken and data cannot be transmitted successfully. •It is difficult to troubleshoot the ring. •It is difficult to troubleshoot the ring.
- 19. SUMMARY DEFINITION •All devices connect to a central device, called hub. DEFINITION •All devices connect to a central device, called hub. ADVANTAGE •Easy to install and wire. ADVANTAGE •Easy to install and wire. •Security can be implemented in the hub/switch. •Security can be implemented in the hub/switch. DISADVANTAGE •Requires more cable length than a linear topology. DISADVANTAGE •Requires more cable length than a linear topology. If the hub or concentrator fails, nodes attached are disabled. If the hub or concentrator fails, nodes attached are disabled. More expensive than linear bus topologies because of the cost of the concentrators. More expensive than linear bus topologies because of the cost of the concentrators. STAR TOPOLOGY •Easy to detect faults and to remove parts •Easy to detect faults and to remove parts
- 20. 1.Provide redundant path between device. SUMMARY DEFINITION •In the mesh topology each computer are connected with each other by separate cable.. DEFINITION •In the mesh topology each computer are connected with each other by separate cable.. ADVANTAGE •1.Provide redundant path between device.. ADVANTAGE •1.Provide redundant path between device.. The network can be expanded without disruption to current user.. The network can be expanded without disruption to current user.. DISADVANTAGE Require more cable then other topology . DISADVANTAGE Require more cable then other topology . Complicated implementations. Complicated implementations. MESH TOPOLOGY