CompTIA IT Fundamentals (FC0-U61) Practice Exam 2026 – Comprehensive All-in-One Guide for Exam Success!

The option that correctly represents a Gigabyte is "GB." In the context of data measurement, "GB" denotes a Gigabyte, which is equal to 1,073,741,824 bytes (or 2^30 bytes) in the binary system commonly used in computing.

The distinction between "GB" and the other options lies in the following:

- "Gb" refers to a Gigabit, which is one-eighth of a Gigabyte, making it a different unit of measurement used primarily for network speeds and data transfer rates.

- "GByte" is not a standard abbreviation broadly recognized in the industry, even though it conveys the same meaning as "GB." It is less commonly used, which may lead to confusion.

- "GiB" stands for GibiByte, which is based on a binary system where 1 GiB equals 1,073,741,824 bytes, but the term is used more in the context of RAM and storage capacity based on binary calculations rather than the decimal measurement associated with Gigabytes.

Overall, "GB" is the universally accepted abbreviation for Gigabyte in most computing contexts, making it the correct choice.