Which of the following characters is not permitted in a DNS domain or host name?

A. Upper and lower case letters
B. Spaces
C. Numbers
D. Hyphens


Answer: B

Computer Science & Information Technology

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A __________ argument is passed to a parameter when the actual argument is left out of the function.

a. false b. true c. null d. default e. None of these

Computer Science & Information Technology

Which of the following open-source operating systems are available for deployment in the Azure gallery?

A) Ubuntu B) SUSE C) OpenLogic D) CentOS E) A and B F) All of the above

Computer Science & Information Technology

When you click a link, the Web server transmits a copy of the video file to your computer, often using ____________________ video technology.

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

Computer Science & Information Technology

Which Internet service makes use of PSTN?

a. Dial-up b. ISDN c. DSL d. Cable Internet

Computer Science & Information Technology