The network interface card or NIC connects your PC to a LAN. The three main types of NIC cards include ARCnet, ethernet, and token ring.

PCs on a LAN are connected with a cable. Three cable types include twisted pair which can be shielded or unshielded (UTP or STP), coaxial which can be thin or thick (ThinNet or Thicknet), and fiber optic.

Finally, networks allow you to share data or files, application software, printers, and send email.

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