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An Ethernet card, also known as a network interface card, allows your computer to connect to a network. This connection may be wired or wireless, depending on your network setup and the specific network interface card. The Ethernet card can also come in several different interfaces in order to connect to your computer.
Wireless
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Wireless networking cards connect to a router using a specific radio wave bandwidth to send information. Wireless connections are slower than wired connections, making it less useful for large file transfers and other processes that need fast network connections. Wireless networking cards may be included on the motherboard or added in through an internal expansion slot.
Wired
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Wired network cards allow you to connect an Ethernet cable to your computer so you can connect to a network, usually through a router. The Ethernet connection is typically included on most modern motherboards. Some computer setups may necessitate additional Ethernet ports. In that case, Ethernet cards can be installed in PCI slots on the computer.
Peripherals and Expansion Cards
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A PCMCIA card, also known as a CardBus card, is an expansion card inserted into a special interface port on a laptop computer. Ethernet cards that use the PCMCIA interface can use an Ethernet or wireless connection. Laptop and desktop computers can use an USB wireless dongle to connect to wireless networks and hotspots.
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