inedata transmission circuittelecommunication circuitNetwork topologyand switchingBandwidthLinksNodesterminalNetwork switchingcircuitpacketTelephone exchangeMultiplexingSpace-divisionFrequency-divisionTime-divisionPolarization-divisionOrbital angular-momentumCode-divisionConceptsCommunication protocolComputer networkData transmissionStore and forwardTelecommunications equipmentTypes of networkCellular networkEthernetISDNLANMobileNGNPublic Switched TelephoneRadioTelevisionTelexUUCPWANWireless networkNotable networksARPANETBITNETCYCLADESFidoNetInternetInternet2JANETNPL networkToasternetUsenetLocationsAfricaAmericasNorthSouthAntarcticaAsiaEuropeOceania(Global telecommunications regulation bodies) Telecommunication ද්වාරය Category Outline Commonsඇපලෝ වැඩසටහනApollo programරටUnited StatesසංවිධානයNASAඅරමුණManned lunar landingතත්ත්වයcompletedඉතිහාසයවියදම$25.4 billion (1973)[1]කාලසීමාව1961–1972පළමු පියාසැරියAS-201, February 