What UDP port do DNS servers primarily use?

A. 53
B. 80
C. 90
D. 110


Answer: A

Computer Science & Information Technology

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In the case of _______ , messages are not sent directly from sender to receiver but rather are sent to a shared data structure consisting of queues that can temporarily hold messages.

Fill in the blank(s) with the appropriate word(s).

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The number of commands remembered varies from shell to shell, but the default is ____.

A. 10 B. 100 C. 1,000 D. 10,000

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When the eyes stop seeing the composite objectively and fail to discern

proper perspectives, what is a good trick to "refresh" the eye? What will be an ideal response?

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?Hardware-based security controls include _____.

A. ?password fields B. ?online forms C. ?system patterns D. ?biometric devices

Computer Science & Information Technology