Units of measurement are standardized magnitudes of quantities.
Conjecture on naming convention
In Cyberspace, most units of measurement use the names of real units with the prefix "cyber" added. This may be justified in that Cyberspace is scaled differently relative to the real world. Time that passes in Cyberspace can be negligible compared to the time elapsed in the real world, so a Cybersecond in Cyberspace could be chosen to feel equal to a second in the real world, while truly being a fraction of the time.
However, while this could be the case for other types of units, there are also instances of real-world units being used in Cyberspace and appearing to be scaled the same relative to Earth natives.