4.5.3 Units of information
To meet this assessment requirement, you should know that:
To meet this assessment requirement, you should know that:
the bit is the fundamental unit of information
a byte is a group of 8 bits.
the 2n different values can be represented with n bits.
Know that quantities of bytes can be described using binary prefixes representing powers of 2 or using decimal prefixes representing powers of 10, eg one kibibyte is written as 1KiB = 210 B and one kilobyte is written as 1 kB = 103 B.
Know the names, symbols and corresponding powers of 2 for the binary prefixes:
kibi, Ki - 210
mebi, Mi - 220
gibi, Gi - 230
tebi, Ti - 240
Know the names, symbols and corresponding powers of 10 for the decimal prefixes:
kilo, k - 103
mega, M - 106
giga, G - 109
tera, T - 1012