Unit 20 — Networking

It worker suffering data loss
In this unit we cover very basic network concepts and terminology.

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In the simplest explanation, networking is just computers talking to each other. They do this by sending data packets using various protocols and transmission mediums such as ethernet cable or Wi-Fi connections. Computers must also know how to find other computers on the network. To put it briefly, every computer on the network needs a unique address so messages know where to go after they are sent. …

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Before the Internet age, corporate LANs often ran on IPX or NetBEUI protocol.
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The man connected to his work intranet from home using a virtual private network
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The network administrator talked with great enthusiasm about upgrading the LAN to Gigabit Ethernet.
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  • Back in the 1980's it was rare for personal computers to perform networking duties. Why? How did computers share data before the rise of the LAN and the Web?
  • What specific benefits does networking computers give us? What are the risks involved?