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Chapter 1. Computer Networking Overview > Understanding LAN Data Transmission

Understanding LAN Data Transmission

Before we delve more deeply into the nuts and bolts of PC networking, we need to discuss how data is transmitted on the network. The way data travels on the network media (such as copper wire and glass fiber-optic cable) differs from how data flows between the different components in a computer.

First, let’s define the bit. A bit is the smallest unit of data found on a computer; bits are represented by either a one (1) or a zero (0). When you type a letter or create a spreadsheet, you see your data as words in paragraphs or numbers in a column. Your computer sees this information as binary data—ones and zeros.


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