Transcription: To enable computers to talk to one another across the internet, they need to be connected together. And this connection is usually done by telephone lines. So theoretically, if you've got a telephone line, then you too can connect to the internet. Of course, it's not quite that straightforward because you can't just plug your PC into the telephone line. Your PC needs a special box called a modem to make that connection. Now there are two basic types of modem. Internal ones which fit inside your PC and external ones which connect to it from the outside. Let's just have a quick look at what we'r ...
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