Glossary | Terms that start with "Z"

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Zero-Day Exploit Attack

A zero-day, zero-hour, or day zero attack or threat is a computer threat that tries to exploit computer application vulnerabilities that are unknown to others or the software developer called zero-day vulnerabilities. This attack takes advantage of a security hole before the vulnerability is known. So, why is it called zero-day? The security issue is made known the same day as the computer is attacked so the software developer has “zero days” to develop a patch or update that fixes the problem before the breach, making it difficult to prevent. Some of the common targets of zero-day attacks are web browsers and email programs.

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ZIP

A zip file (.zip) is a “zipped” or compressed file. For example, when you download a file, if the filename looks like this: “filename.zip,” you are downloading a zipped file. “Zipping” a file involves compressing one or more items into a smaller archive. A zipped file takes up less hard drive space and takes less time to transfer to another computer. This is why most Windows files that you find on the Internet are compressed.

The term “Zip” also refers to a product by Iomega. The company makes a removable storage device called a Zip Drive. Depending on the model, these drives can hold 100, 250 or 750 MB Zip disks. They are usually used for backup and for transferring large files to different locations.

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