Which of the following is an example of a personal software firewall?
A. Proxy server
B. ZoneAlarm
C. Microsoft ISA server
D. Antivirus software
B. ZoneAlarm is an example of a personal software firewall. Other examples include Windows Firewall and ipfirewall. A proxy server is a computer placed between the LAN and the Internet that acts as a go-between; it usually caches HTTP requests. Microsoft ISA server is a corporate version of a software-based firewall. Antivirus software might have a built-in firewall, but it might not. Its primary function is to search for and quarantine viruses.
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Marla is working in a database that stores customer purchases. She needs to find customers in the New York area that have purchased over $5000 worth of goods. Which query operator would Marla use in a query to find this information?
A) OR B) AND C) NULL D) NOT
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Fill in the blank(s) with the appropriate word(s).