network simulation by mouse (nsbm) a gui approach for teaching computer networks with the n

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1、ConferenceICL2006September27-29,2006Villach,AustriaNetworkSimulationByMouse(NSBM):AGUIApproachforTeachingComputerNetworkswiththensSimulatorMichaelWelzl,MuhammadAli,SvenHesslerInstituteofComputerScienceUniversityofInnsbruck,AustriaAbstractThensnetworksimulatorisacommontoolfrequentlyusedforteach-ing

2、thefundamentalsofcomputernetworks.However,ourexperiencewithstudentshasshownthatwritinglongnsscriptsisnotappreciatedbythem.Hence,weusedacustom-madevisualizationtool—NSBM—wheretopolo-giesarecreatedusingamouseandthentheTCLscriptisgeneratedauto-matically.Thetoolisinteractiveandhasaneasyinterfacetocrea

3、tetopolo-giesanddefineagentsandprotocolsthatgovernthecommunicationsetup.Thefeedbackofstudentswasrelativelyencouragingasthemajorityfoundittobeusefulinlearningnetworkingfundamentals.1IntroductionThens-21networksimulatorhasbeenusedbynetworkresearchersforalongtimeforimplementingandanalyzingnovelideasan

4、dnewapproachesemergingincomputernetworks.Likewise,thetooliswidelyusedinuniversitiesforteach-ingnetworks.Acourselikecomputernetworks,canbecomeextremelyboringand,sometimes,frustratingwhenthereisnovisualizationofthecontentsthatthestudentsstudyintheirbooks.Moreover,usingsimulationtoolslikens-2makesit1

5、sometimescallednsandsometimesns-2referringtotheversionnumber;wewillusethetermsynonymously1(8)ConferenceICL2006September27-29,2006Villach,AustriaNS:usefullnessforexercisesvseffortneededtolearnnsusefulnesseffort2520tsn15edtusfo.10on50highesthighmediumlowverylowdegreeofgoodnessFigure1:Studentsfeedbac

6、kcomparisonofeffortrequiredtolearnnsagainstitsusefulnesseasiertomakestudentsunderstandthetheoreticalaspectsthattheylearn.Ourex-perienceofteachingcomputernetworksusingns-2alongwithothersimilartoolslikeCAVT[1]andIRVtool2hasfurtheracknowledgeditssignicance.Theconvenienceofusingns-2inteaching,neverth

7、eless,comeswithaprice.Wehavelearnedthroughourpersonalteachingexperienceofseveralyearsthatns-2hasneverbeenafavoritechoiceforstudents.TheydislikeditbecauseofthelengthycodingofTCLlanguage.Studentsfeedbackclearlyindi