Connecting to a broadband service provider pushes you to connect other devices to broadband as well. After all, for a few extra dollars every computer in the house can enjoy fast broadband surfing.
The software side of networking includes configuring devices, handling network addresses, and a bit about secure network routing. Underneath it all is TCP/IP, the protocol that connects the Internet (and just about everything else in the world today).
More computing means more people making more data and more reasons to protect that data. A little planning will avoid lost files and accidentally deleted documents, and keep your favorite files, photos, and music safe and sound.
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