Business Data Communication Stalling's Sixth ed. exercise:

-> Base64 encoding allows arbitrary sequences of octets to be represented by printable

characters. The encoding process represents 24-bit groups of input bits as strings of

four encoded characters. The 24-bit groups are formed by concatenating three octets.

These 24-bit groups are then treated as four concatenated 6-bit groups, each of which

is translated to a character of the Base64 alphabet. The encoded output stream is represented

by lines of no more than 76 printable characters, with line breaks being indicated

by the CR, LF character sequence.

A. How much will a file be expanded by

encoding it with Base64?

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