64 Chapter 4 Problem, Meet Solution
Network Connections
MakesuretheEthernetcableispluggedintoyourMacBookandintothenetwork.
CheckthecablesandpowersuppliestoyourEthernethubsandrouters.
IfyouhavetwoormorecomputerssharinganInternetconnection,besurethatyour
networkissetupproperly.YouneedtoknowifyourISPprovidesonlyoneIPaddress
orifitprovidesmultipleIPaddresses,oneforeachcomputer.
IfonlyoneIPaddressisprovided,thenyoumusthavearoutercapableofsharing
theconnection,alsoknownasnetworkaddresstranslation(NAT)or“IPmasquerading.”
Forsetupinformation,checkthedocumentationprovidedwithyourrouterorask
thepersonwhosetupyournetwork.YoucanuseanAirPortbasestationtoshare
oneIPaddressamongmultiplecomputers.ForinformationaboutusinganAirPort
basestation,checkHelpCenterorvisittheAppleAirPortwebsiteat
www.apple.com/support/airport.
Ifyoucan’tresolvetheissueusingthesesteps,contactyourISPornetworkadministrator.
Problems with Wi-Fi Communication
If you have trouble using Wi-Fi communication:
 Makesurethecomputerornetworkyou’retryingtoconnecttoisrunningandhasa
wirelessaccesspoint.
 Makesureyou’veproperlyconguredthesoftwareaccordingtotheinstructionsthat
camewithyourbasestationoraccesspoint.
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