NETWORK TOPOLOGIES

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  • 1. INFORMATION AND COMMUNICATION TECHNOLOGY (ICT) FOR YEAR NINE (JS 3) STUDENTSREGAL COLLEGE, SAGAMUTOPIC: Network Topologies

2. Main MenuOBJECTIVE CONTENT EXERCISESUMMARYEXIT 3. OBJECTIVEAt the end of this lesson, student should be ableto achieve all the three objective below:- Explain meaning of network topology with correctly. At the end of this lesson, student should be ableto achieve all the three objective below:- State three types of network topologies correctly. Differentiate correctly between the three types of network topology.MAIN MENUCONTENT EXERCISE SUMMARYEXIT 4. CONTENTDefinition ofNetwork TopologyTypes ofNetwork TopologyDifferentiation Between theTypes of Network TopologyMAIN MENU OBJECTIVE EXERCISE SUMMARY EXIT 5. DEFINITIONWhat is a Topology ? This refers to the structural architecture or arrangement ofcables, computers and other peripherals devices in network.MAIN MENU OBJECTIVE EXERCISE SUMMARY EXIT 6. TYPES OF NETWORK TOPOLOGYThree commonly used network topologiesare:- Bus network. Ring network. Star network.MAIN MENU OBJECTIVE EXERCISE SUMMARY EXIT 7. BUS TOPOLOGYAll computers and devices areconnected to central cable or bus.It consists of a main run of cablewith a terminator at each end.They are popular on LANsbecause they are not expensiveand easy to install.MAIN MENU OBJECTIVE EXERCISE SUMMARY EXIT 8. BUS TOPOLOGYMAIN MENU OBJECTIVE EXERCISE SUMMARY EXIT 9. BUS TOPOLOGYMAIN MENU OBJECTIVE EXERCISE SUMMARY EXIT 10. RING TOPOLOGYCable forms closed ring or loop,with all computers and devicesarranged along the ring.Data travels from device todevice around entire ring, inone direction.Primarily is used for LANs,but also is used in WANs. MAIN MENU OBJECTIVE EXERCISE SUMMARY EXIT 11. RING TOPOLOGYMAIN MENU OBJECTIVE EXERCISE SUMMARY EXIT 12. STAR TOPOLOGYAll devices connect to acentral device, calledHub or switch.All data transferredfrom one computer toanother pass through theHub or switch. MAIN MENU OBJECTIVE EXERCISE SUMMARY EXIT 13. STAR TOPOLOGYMAIN MENU OBJECTIVE EXERCISE SUMMARY EXIT 14. STAR TOPOLOGYMAIN MENU OBJECTIVE EXERCISE SUMMARY EXIT 15. DIFFERENTIATION BETWEEN THE THREE TYPES OF NETWORK TOPOLOGYWHAT ARE THE DIFFERENCES BETWEEN THE THREE OFNETWORK TOPOLOGY?SEARCH IN THE INTERNETMAIN MENU OBJECTIVE EXERCISE SUMMARY EXIT 16. DIFFERENTIATION BETWEEN THE THREE TYPES OF NETWORK TOPOLOGYBUS ADVANTAGEDISADVANTAGE1) Easy to connect computer or1) Entire network shuts down if peripheral to a linear bus. there is a break in the main cable.2) Requires less cable length 2) Terminators are required at than a star topology.both ends of the backbonecable.3) Failure of one computer does 3) Difficult to identify thenot affect the rest of theproblem if the entire networknetwork.shuts down.4) Requires no hub or switch4) It is increasingly becomingoutdated MAIN MENUOBJECTIVE EXERCISESUMMARYEXIT 17. DIFFERENTIATION BETWEEN THE THREE TYPES OF NETWORK TOPOLOGY RINGADVANTAGEDISADVANTAGE1) Data is quickly transferred 1) Data packets must passwithout a bottle neck.through every computerbetween the sender andrecipient therefore, this makesit slower.2) The transmission of data is 2) If there is a fault in the wiringrelatively simple as packets between two computers then thetravel in one direction only.whole network will fail.3) It is possible to create very 3) It is difficult to troubleshootlarge networks using ring the ring.topology. MAIN MENU OBJECTIVE EXERCISE SUMMARY EXIT 18. DIFFERENTIATION BETWEEN THE THREETYPES OF NETWORK TOPOLOGY STARADVANTAGE DISADVANTAGE1) Easy to install and expand.1) Requires more cable lengththan a linear topology.2) Security can be implemented2) If the hub or concentrator in the hub/switch. fails, nodes attached aredisabled.3) Easy to detect faults and to 3) More expensive than linear remove parts.bus topologies because of thecost of the concentrators.MAIN MENUOBJECTIVEEXERCISE SUMMARYEXIT 19. EXERCISE1) Which of the following statements describes network topology correctly ?A. Devices attached or detached at any point on the network.B. The failure of device on the network.C. The structural architecture or arrangementof cables, computers and other peripheralsdevices in network.D. All of the above. MAIN MENU OBJECTIVE CONTENT SUMMARY EXIT 20. EXERCISE2) On a __________, all of the computers and devices (nodes) on the network are connected to a central device. A. Bus network. B. Ring network. C. Star network. D. All of above.MAIN MENU OBJECTIVE CONTENT SUMMARY EXIT 21. EXERCISE3) On a star network, the centraldevice that provides a common connection point for computers and devices on the network is called the __________.A. Hub/Switch.B. Personal computer.C. Printer.D. File server.MAIN MENU OBJECTIVE CONTENT SUMMARY EXIT 22. EXERCISE4) On a bus network, such as that illustrated in theaccompanying figure, if one node fails ________. A. Only that node is affected. B. Only the nodes before that node are affected. C. Only the nodes after that node are affected. D. All the nodes are affected. MAIN MENU OBJECTIVE CONTENT SUMMARY EXIT 23. EXERCISEThe transmission of data is relatively simpleas packets travel in one direction only.5) The statement above correctly refers to the ______.A. Bus network.B. Ring network.C. Star network.D. All of the above. MAIN MENU OBJECTIVE CONTENT SUMMARY EXIT 24. EXERCISE 6) All the statements are true about ring topology except _____________A. Data is quickly transferred without abottle neck.B. The transmission of data is relatively simple aspackets travel in one direction only.C. If any of the nodes fail then the ring is brokenand data cannot be transmitted successfully.D. Security can be implemented in the hub/switch. MAIN MENU OBJECTIVE CONTENT SUMMARY EXIT 25. EXERCISE 7) Which of the following statements is true about star topology?A. Difficult to identify the problem if the entire network shuts down.B. Terminators are required at both ends of the backbone cable.C. The transmission of data is relatively simpleas packets travel in one direction only.D. Easy to detect faults and to remove parts. MAIN MENU OBJECTIVE CONTENT SUMMARY EXIT 26. ANSWERQUESTION 1QUESTION 2QUESTION 3QUESTION 4QUESTION 5QUESTION 6QUESTION 7 YOU ANSWER IS WRONG,TRY AGAIN !!!MAIN MENUOBJECTIVECONTENT SUMMARY EXIT 27. ANSWERQUESTION 1QUESTION 2QUESTION 3QUESTION 4QUESTION 5YOUR ANSWERIS CORRECT !!!QUESTION 6QUESTION 7MAIN MENUOBJECTIVE CONTENT SUMMARY EXIT 28. SUMMARY BUS TOPOLOGYDEFINITIONADVANTAGEDISADVANTAGEAll computersEasy to connect aEntire network shutsand devicescomputer ordown if connected toperipheral to a linear there is a break in the central cable bus.main cable. Requires less cable Terminators are length thanrequired at both a star topology. ends of the backbone cable. Difficult to identifythe problem if the entire networkshuts down. MAIN MENU OBJECTIVECONTENT EXERCISEEXIT 29. SUMMARYRING TOPOLOGY DEFINITIONADVANTAGEDISADVANTAGECable forms Data is quickly Data packets must passclosed ring ortransferred without a through every computerloop, with allbottle neck.between the sender and computers and recipient therefore, thisdevices arranged The transmission of data is relativelymakes it slower.along ring. simple as packets If any of the nodes failtravel in one directionthen the ring is brokenonly.and data cannot betransmitted successfully. It is difficult to troubleshootthe ring.MAIN MENUOBJECTIVECONTENT EXERCISEEXIT 30. SUMMARYSTAR TOPOLOGYDEFINITION ADVANTAGEDISADVANTAGERequires more cable All devicesEasy to install and length connect to a wire.than a linear topology.central device,called hub. Security can be If the hub orimplemented concentrator fails, in the hub/switch. nodes attached are disabled.Easy to detect faults and to More expensive thanremove parts linear bus topologies because of the cost of the concentrators. MAIN MENUOBJECTIVECONTENT EXERCISEEXIT 31. ARE YOU SURE TO EXIT ?YES NO 32. INFORMATION AND COMMUNICATIONTECHNOLOGY (ICT) FOR YEARNINE (JS 3) STUDENTS REGAL COLLEGE, SAGAMU