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Expansion Cards

Small circuit boards that control the peripheral devices

Graphics Cards

Takes signals from the processor and displays the graphics, images in the monitor

Sound Cards

Converts analog sound signals to digital and vice versa

Modem

Transmits data over phone or cable lines

Ethernet card

Serves as the interface to a Local Area Network (LAN), a common network technology allowing users access to network resources such as the Internet, email, shared printers, etc.

Transfers data at a rate of 10 Mb/s

Newer versions of Ethernet called "Fast Ethernet" and "Gigabit Ethernet" support data rates of 100 Mb/s and 1 Gb/s (1000 Mb/s).

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