Name: _____________________

                                                 id#: _____________________


			 UNIX System Administration Exam 17 

Notes:
	No circular definitions please.
	Be very specific.
	All terms should be assumed to be in the context of UNIX. 
	Grading:
         	3 free points
         	1 point for each correct answer
        	-1 point for each incorrect, partial, or unintelligible answer
         	0 points for each unanswered question
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What is the purpose of the /etc/shadow file and what problem does it solve?




How would you remotely detect what network services a machine provides? 




How would you remotely find out what operating system a machine is running?




Exactly how does the "crack" program work?




What does the TCP wrappers package do and how does it increase security?





How could you know whether your machine has been hacked?




What is the security risk posed by setuid programs?