btec level 3 extended diploma in it unit 5: … · 2016-11-30 · btec level 3 extended diploma in...
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Level3Unit5 NetworkManagementLecturer:AndrewBlundell
BTECLevel3ExtendedDiplomainIT
Unit5:ManagingNetworks
Key Points
Level3Unit5 NetworkManagementLecturer:AndrewBlundell
Networkmanagementfunctions
The initialphaseofthemanagementfunctionisto?
Unit5:ManagingNetworks
Level3Unit5 NetworkManagementLecturer:AndrewBlundell
Networkmanagementfunctions
The initialphaseofthemanagementfunctionisto:
• Plan• Design• Installthenetwork.
Unit5:ManagingNetworks
Level3Unit5 NetworkManagementLecturer:AndrewBlundell
Planninganetwork
The goals ofanetworkarereasonablysimpletounderstand.
Anetworkshould?
Unit5:ManagingNetworks
Level3Unit5 NetworkManagementLecturer:AndrewBlundell
Planninganetwork
The goals ofanetworkarereasonablysimpletounderstand.
Anetworkshould:
• providetheservicesrequiredbyitsendusers• improvecommunicationswithinanorganisation• improvesharingofresources withinanorganisation• providetheseserviceswithacceptableresponsetimes• be cost-effective and withinaplannedandagreedbudget• work reliablyandflexibly• be expandable withoutrequiringmajorchanges• be easytomanageonaday-to-daybasis• havegoodsupportdocumentation
Unit5:ManagingNetworks
Level3Unit5 NetworkManagementLecturer:AndrewBlundell
Designingandinstallinganetwork
Amission-criticalundertaking,withmanyoftheorganisation’sinternalfunctionsrelyingonthedevelopmentofarobustandreliablesystem.
Keystagesinclude?
Unit5:ManagingNetworks
Level3Unit5 NetworkManagementLecturer:AndrewBlundell
Designingandinstallinganetwork
Amission-criticalundertaking,withmanyoftheorganisation’sinternalfunctionsrelyingonthedevelopmentofarobustandreliablesystem.
Keystagesinclude:
GatheringinformationfromendusersAgreeingandprioritisingtherequirementsAssessingrequirementsExaminingconstraintsCapacityplanningDesigningnetworksolutionImplementingnetworksolutionUndertakingaperformancereview
Unit5:ManagingNetworks
Level3Unit5 NetworkManagementLecturer:AndrewBlundell
Afterimplementation,thenetworkmanagerhastocopewithanumberofdifferentissuesthatrelatetothenetwork’s day-to-dayrunning:
Theseinclude:• Configuration – howanetworkissetupandhowitisorganisedtomeetan
organisation’sneeds• Faultmanagement– howerrorsareidentifiedanddealtwithtoensuregood
qualityofnetworkservice• Accountmanagement– theactofmanagingusersandtheirnetworkprivileges• Assessingperformance– howwellthenetworkisperformingcomparedtoits
potentialanditscustomerrequirements• Maintainingsecurity– ensuringthenetworkhasintegrityandprotectionfrom
potentialelements• Reporting – informationtoassistantmanagers,informusersorbriefmanagersis
theorganisation
Unit5:ManagingNetworks
Level3Unit5 NetworkManagementLecturer:AndrewBlundell
A proactive networkmanagerwhokeepsacloseeyeonsuchissueswillnaturallybeableto:
• Spotfaultsearlybeforetheystartsaffectingperformance• Identify (andjustify)theneedforupgradesbefore
performancehasstartedtosuffer• Anticipateemergingissueswhichmayimpacttheorganisation• Draw upa roadmapdefiningfutureneedsandgrowth• Makeinformeddecisionsabouttherunningandconfiguration
ofthenetwork
Unit5:ManagingNetworks
Level3Unit5 NetworkManagementLecturer:AndrewBlundell
Networkingoperatingsystems(NOS)
Atypeofsystemssoftwarethatisspecificallywrittentosupportnetworkingfunctions,particularlyovera LAN.
Itsfunctionscaninclude:
• networkingprotocols(e.g.TCP/IP);• userlog-inand authentication;• mechanismsforsharingfilesand resources suchasprinters;• facilitiesformanagingadministrativefunctionssuchassecurity,email
support.
Unit5:ManagingNetworks
Level3Unit5 NetworkManagementLecturer:AndrewBlundell
CommonNOSarepresentin:
• Linux• MacOSX• Windows
Unit5:ManagingNetworks
Level3Unit5 NetworkManagementLecturer:AndrewBlundell
NetworkingProtocols
Anetworkmanagerneedstobeawareofanumberofdifferentprotocols,especiallythosethatexistinthe applicationlayeroftheseven-layer ISOOSImodel.
Commonprotocolsinclude?
Unit5:ManagingNetworks
Level3Unit5 NetworkManagementLecturer:AndrewBlundell
NetworkingProtocols
Anetworkmanagerneedstobeawareofanumberofdifferentprotocols,especiallythosethatexistinthe applicationlayeroftheseven-layer ISOOSImodel.
Commonprotocolsinclude:• HTTP (HypertextTransferProtocol)• FTP (FileTransferProtocol)• TFTP(TrivialFileTransferProtocol)• SNMP (SimpleNetworkManagementProtocol)• NTP (NetworkTimeProtocol)
Unit5:ManagingNetworks
Level3Unit5 NetworkManagementLecturer:AndrewBlundell
DesignConsiderations
Whendesigninganetwork,thereareanumberofdifferentaspectswhichshouldbetakenintoconsideration.
Theseaspectsincludethefollowing?
Unit5:ManagingNetworks
Level3Unit5 NetworkManagementLecturer:AndrewBlundell
DesignConsiderations
Whendesigninganetwork,thereareanumberofdifferentaspectswhichshouldbetakenintoconsideration.
Theseaspectsincludethefollowing:
• Speed• Usability• Functionality• Cost• Flexibility• Availableexpertise• Complexity• Securityrequirements• Internetaccess
Unit5:ManagingNetworks
Level3Unit5 NetworkManagementLecturer:AndrewBlundell
Networkingmanagementtoolsandtechnologies
Itisvitalthatanetworkmanagerknowsabouttheunderlyingtoolsandtechnologiesattheirdisposal.
Theseinclude:• Hardware suchas– Servers(Mail,File,Printetc),Workstations,NICs
andNetworkMonitoringsolutions.• Networkingtoolstomonitorperformancelevelsagainstsetthresholds.
Unit5:ManagingNetworks
Level3Unit5 NetworkManagementLecturer:AndrewBlundell
Faultmanagement
Thegoalsoffaultmanagementare:
• Detectproblems• Logproblems(foraudit)• Notifyusersaboutproblems• Automaticallyfixproblems(wherepossible)
Examplesofcommonnetworkmanagementtoolsinclude:HPOpenview andCiscoWorks.
Unit5:ManagingNetworks
Level3Unit5 NetworkManagementLecturer:AndrewBlundell
Layout
LANscomeinmanydifferentshapesandsizes,buttheygenerallyusesimilartechnologiesandcomponents.
ThemostcommontypeofLANisbasedonEthernettechnology,asoriginallydevisedbyDigital,IntelandXerox.
ThiswasusedastheblueprintfortheIEEE’s(InstituteofElectricalandElectronicsEngineers)802.3specificationwhichwasreleasedbackin1980.
OvertheyearsanumberofimprovementshavebeenmadetoEthernettechnology.
Unit5:ManagingNetworks
Level3Unit5 NetworkManagementLecturer:AndrewBlundell
Emergingtechnologies
Newtechnologieshavehadanimpactonnetworkmanagementandusage.
Theseinclude:
• Mobilenetworking(e.g.Wi-Fi,4G)• Webinterfacing• CloudStorage• VoiceoverIP(VoIP)• RDP
Unit5:ManagingNetworks
Level3Unit5 NetworkManagementLecturer:AndrewBlundell
Regularmaintenanceactivities
Thejobsthatnetworkmanagersoradministratorsperformonaroutinebasisinclude?
Unit5:ManagingNetworks
Level3Unit5 NetworkManagementLecturer:AndrewBlundell
Regularmaintenanceactivities
Thejobsthatnetworkmanagersoradministratorsperformonaroutinebasisinclude:
• Useraccountcreationanddeletion• Designinganddevelopinglog-inscripts• Filesystemmaintenance
Unit5:ManagingNetworks
Level3Unit5 NetworkManagementLecturer:AndrewBlundell
Documentation
Documentationisavitalactivityasitisthebestwayofcreatingaknowledgebaseforidentifiednetworkproblems,solutionsand‘workarounds’.
Typicalexamplesofnetwork-relateddocumentationinclude?
Unit5:ManagingNetworks
Level3Unit5 NetworkManagementLecturer:AndrewBlundell
Documentation
Documentationisavitalactivityasitisthebestwayofcreatingaknowledgebaseforidentifiednetworkproblems,solutionsand‘workarounds’.
Typicalexamplesofnetwork-relateddocumentationinclude:
• Networkdesign(logical,physical,locationofcables,switchesetc)• Worklogs(detailingmaintenance,faultsandsolutions)• Upgradeplan(roadmap)orITstrategydocument
Unit5:ManagingNetworks