questions asked during network engineer interview

I *love* questions like that, because I can immediately respond back with
"well, that depends; did your sysadmin configure rfc1323 extension support
in your TCP stack? Is SACK enabled? What about window scaling? Does your
OS do dynamic buffer tuning for TCP, or are the values locked in at start

On the other hand, it might not be bad ask as a "what would you do if somebody asked you this question, what would you do research how to answer the question?" because this is definitely something that an unknowledgeable person up the management chain might ask.