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A megabit is defined as 1,000,000 bits. However, in some computing contexts, a megabit may also be considered as 1,048,576 bits, which is derived from the binary measurement of 1 megabyte (1 MB = 1,024 KB and 1 KB = 1,024 bytes, where 1 byte = 8 bits). This calculation reflects the use of powers of two, which is common in computer science.
Therefore, the correct answer reflects the binary measurement context, where 1 megabit equals 1,048,576 bits. In practice, it is essential to clarify whether the term "megabit" is being used in a decimal (base 10) or binary (base 2) context to avoid confusion, as both definitions exist in various fields, particularly in telecommunications and computer data storage. This understanding is crucial for interpreting data transfer rates and storage capacity accurately.