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IP Address Structure

An IP address is typically written in decimal digits, formatted as four 8-bit fields separated by periods. Each 8-bit field represents a byte of the IP address. This form of representing the bytes of an IP address is often referred to as the dotted-decimal format.

IP addresses explained 

What do these mysterious numbers and dots mean and how are they used? Richard Mortier explains the idea of the addresses behind the internet protocol.

Why Do We Need IP Addresses?

Why do we need IP addresses when every network interface has its own Mac address?

Additional Resources

Video: IP4 and IP6 - the future of the internet and the current problems