A(n)________ blocks unauthorized access to a network.

a. firewall
b. modem
c. ONT
d. switch


a. firewall

Computer Science & Information Technology

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QPSK uses four signal states that are ____ degrees out of phase to carry four signal values.

A. 30 B. 60 C. 90 D. 180

Computer Science & Information Technology

Match the following terms to their meanings:

I. Program that intentionally harms your computer A. spyware II. Computer that has malware installed B. virus definition III. Software that collects personal information C. Trojan horse IV. A program that disguises itself as a legitimate program D. malware V. Information needed by the antivirus program to find E. infected and remove a virus

Computer Science & Information Technology

A wall outlet is typically _______ AC volts

Fill in the blank(s) with correct word

Computer Science & Information Technology

SONET is normally associated with which of the following?

A. Point to point B. Point to multipoint C. Ring D. Bus

Computer Science & Information Technology