Name: _____________________

                                                 id#: _____________________


			 UNIX System Administration Exam 12 

Notes:
	No circular definitions please.
	Be very specific.
	All terms should be assumed to be in the context of UNIX & TCP/IP.
	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 does it mean for a file to be setuid?




What is an Ethernet switch and how does it differ from a hub?




How is an Ethernet switch different from a router?




What is the benefit of using DNS instead of a /etc/hosts file?




What is a top-level domain?




What is BIND?




What is a recursive nameserver and how does it answer a DNS query?