Presentation on theme: "Basic Concepts of Computer"— Presentation transcript:
1 Basic Concepts of Computer Networks andNetwork TopologySubmitted byASHIMA KALRA
2 To be discussed… Definition of topology Types of Network topology -Bus topology-Ring topology-Star topology-Mesh topologyAdvatages of topologiesDisadvantages of topologies
3 DEFINITIONThe physical topology of a network refers to the configuration of cables, computers and other peripherals.
4 TYPES OF NETWORK TOPOLOGY Bus network.Ring network.Star network.
5 BUS TOPOLOGYAll 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.
8 RING TOPOLOGYCable 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.
13 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 TOPOLOGYBACK
14 DIFFERENTIATION BETWEEN THE THREE TYPES OF NETWORK TOPOLOGY
15 SUMMARY DISADVANTAGE BUS TOPOLOGY ADVANTAGE DEFINITION Easy to connect a computer orperipheral to a linear bus.DISADVANTAGEEntire network shuts down ifthere is a break in the main cable.DEFINITIONAll computers and devices connected to central cableRequires less cable length thana star topology.Terminators are required at bothends of the backbone cable.Difficult to identify the problemif the entire network shuts down.
16 SUMMARY DISADVANTAGE RING TOPOLOGY DEFINITION ADVANTAGE Cable forms closed ring or loop, with all computers and devices arranged along ring.ADVANTAGEData is quickly transferred without a ‘bottle neck’.The transmission of data is relativelysimple as packets travel in one direction only.DISADVANTAGEData packets must pass through every computerbetween 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.It is difficult to troubleshootthe ring.
17 SUMMARY DISADVANTAGE STAR TOPOLOGY DEFINITION ADVANTAGE All devices connect to a central device, called hub.ADVANTAGEEasy to install and wire.Security can be implementedin the hub/switch.DISADVANTAGERequires more cable lengththan a linear topology.If the hub or concentrator fails,nodes attached aredisabled.More expensive than linear bus topologies because of the cost of the concentrators.STAR TOPOLOGYEasy to detect faults and toremove parts
18 SUMMARY 1.Provide redundant path between device. DISADVANTAGE DEFINITIONIn the mesh topology each computer are connected with each other by separate cable..ADVANTAGE1.Provide redundant path between device..The network can be expanded without disruption to current user..DISADVANTAGERequire more cable then other topology .Complicated implementations.MESH TOPOLOGY1.Provide redundant path between device.SUMMARY