each internet connection will have a unique IP Adress not necaserily each machine connected to the net. A network of machines will generaly have internally assigned ips and only one pulbic =( internet Ip)accessed through a gateway (another machine or router)
when you connect your isp will assign you an IP adress from a pool so regardless of who is using the machine you will have that ip adress all the time you are connected it does not recognise who is using the machine it is a unique number that identifies your machine on the internet i think the best way to describe it is a postal adress
when you go on the internet an search for something you are requesting information. the server you request the information from needs to know where to send it hence your ip adress internet postal adress
I have windows98SE is it possible to hide my ISP.I'm getting a lot of E-Mails with attachments which have a virus in them, luckily Yahoo won't let me open them because of this virus but the people I get them from are genuine from my address book.Any body else come across this. Thanks.