Just for fun, the IPv4 address 192.168.213.84 written in IPv6-style hexadecimal notation is c0a8: ... your engineers and network operators are going to need to be able to do conversions.

If you’ve forgotten what hexadecimal notation is, here’s a quick refresher. Hexadecimal, or base 16, notation uses the digits 0-9 and the letters A-F to represent the digits 0-15.