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