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Sams Teach Yourself Network Troubleshooting in 24 Hours, Second Edition by Jonathan Feldman

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Network Interface Cards

Your telephone is very much like the network interface card (NIC) in your computer. Both of them help an individual entity (you, in the case of your telephone, and your computer, in the case of the NIC) talk to others. Also, both the telephone and the network card are oblivious to who is being communicated with and what kind of business is being transacted.

Your telephone is a physical piece of hardware that enables you to connect through telephone company equipment to talk to folks next door or halfway around the world. This is also true of your NIC. It can talk to other NICs on the same line as well as NICs on different lines by using switching equipment that’s connected to the line.

MAC Attack

Just as each residence ...

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