What is an IP address?

An IP address serves as a unique identifier for a device on a network, allowing for communication between different devices over the internet or other networked systems. Just like a home address helps the postal service deliver mail to a specific location, an IP address ensures that data packets reach the correct device within a larger network. This uniqueness is crucial because it prevents data from being misrouted and ensures that devices can locate and communicate with each other effectively.

The necessity for a unique identification system in networking is paramount as it helps manage and direct internet traffic. Various routing protocols leverage IP addresses to facilitate data movement across the global web of interconnected devices. This definition is key in understanding network architecture and the foundational principles of how the internet functions.