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

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Q&A

Q1: Some of this network discovery stuff looks like cracker-type espionage. Are you sure I should be doing this?
A1: If the network that you’re performing a discovery on isn’t a network that you’re responsible for, definitely not. It’s considered antisocial and possibly illegal to gather this type of information without authorization. However, if you’re the person responsible for this network, you’ve got to know this information. If someone has not left you a paper trail, you must create one. Just as in the movies, the good guys use some of the same tools as the bad guys—it just depends what your motives and responsibilities are.
Q2: Any more tips for TCP/IP discovery without automation tools?
A2: Sure, but isn’t it worth $15 or a 10-minute ...

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