Used for what???The hexadecimal system is just a way torepresent information. Each byte requires two hexadecimal digits.Modern computers have billions of bytes in RAM, and often atrillion or more bytes on the hard disk, so that would be billionsor trillions of hexadecimal digits.Some examples of things that are often represented as hexdigits:* An IPv6 address has 16 bytes - so, 32 hex digits.* A MAC address has 6 bytes (12 hex digits).* A register has a few bytes. The size varies, but is often 2-8bytes.