An IP Address is a unique number used to identify a computer or a network device in the network or on the Internet. An IP Address looks like the following,xxx.xxx.xxx.xxx where x is a decimal representation of the equivalent Hexadecimal value. As you can see, there are 4 Octets split by three DOTS. This way of representing an IP address is called DOT Notation. An IP Address comprises of 2 parts. A Network ID and a Host ID. In simple words, its like the Street Address and the Door Number, where Street Address is your Network ID and the Door number is the unique host ID.