NCTI TECH 3-4 FINAL EXAM WITH CORRECT ANSWERS 2025

NCTI TECH 3-4 FINAL EXAM WITH
CORRECT ANSWERS 2025
TheWopenWsystemWinterconnectionWmodelW(OSI/R<)WNetworkWlayerWservesWwhichWprimaryWfunction?W-
WCORRECTWANSWERW-ItWusesWlayerW3WaddressesWtoWcreateWmultipleWroutedWnetworks




TheWaddressW68.56.189.17WbelongsWtoWwhichWinternetWprotocolWIPWclass?W-WCORRECTWANSWERW-ClassWA



WhatWhappensWtoWaWdatagramWsentWbyWaWhigherWlevelWprotocolWtoWaW127.x.y.zWaddress?W-
WCORRECTWANSWERW-

TheWdatagramWloopsWbackWinsideWtheWhostWandWneverWleavesWtheWnetworkWinterfaceWcard(NIC)



WhichWdeviceWevaluatesWandWactsWuponWaWpacket'sWinternalWprotocolW(IP)Waddress?W-
WCORRECTWANSWERW-Router




TheWnetworkWlayerWmustWdoWwhatWtoWaWreceivedWframe,WinWorderWtoWdetermineWtheWrouteWoverWwhich
WitWwillWforwardWtheWdatagramWtoWtheWnextWnetworkW-WCORRECTWANSWERW-DecapsulateWtheWpacket.




WhatWnetworkWinformationWcanWbeWdeterminedWfromWaWlogicalWinternetWprotocol(IP)Waddress?W-
WCORRECTWANSWERW-TheWhostWportionWandWnetworkWportion.




TheWphysicalWaddressWofWaWdeviceWisWprocessedWbyWwhichWlayerWofWtheWopenWsystemsWinterconnectionW
referenceWmodel(OSI/RM)W-WCORRECTWANSWERW-TheWdataWlinkWlayer



WhichWlayerWofWtheWopenWsystemWinterconnectionWreferenceWmodelW(OSI/RM)WwouldWyouWsuspectWasWb
eingWtheWproblemWwhenWpacketsWarrivingWatWtheWserverWbutWnoWinformationWisWbeingWreturnedWtoWtheW
client?W-WCORRECTWANSWERW-TheWtransportWlayer



AllWcomputersWrunningWonWtheWtransmissionWcontrolWprotocol/internetWprotocolW(TCP/IP)WsuiteWhaveWw
hichWofWtheWfollowingWinWcommon?W-WCORRECTWANSWERW-
EachWcomputerWisWassignedWitsWownWinternetWprotocol(IP)Waddress.



AWrepeaterWoperatesWatWwhichWlayerWofWtheWopenWsystemsWinterconnectionWreferenceWmodelW(OSI/RM)
?W-WCORRECTWANSWERW-TheWphysicalWlayer