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> I mean who would know just how long a MAC address is? Or what the actual SYN/ACK etc tcp flags are? You just need to know what they're used for

Depends on what you actually do in your job, I suppose. If you use that information regularly or troubleshoot networks regularly you would soon enough memorize it.

> and if you need the specifics, you'll find out with a single search.

Someone doing network programming _does_ need the specifics.



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