What role does an IP address serve in the context of the Internet?

An IP address serves as a unique identifier for each device connected to the Internet, functioning much like a postal address does for a physical residence. This identification is essential for successful communication between different devices. When data is transmitted over the Internet, it is directed to specific IP addresses, allowing devices to send and receive information accurately. An IP address makes it possible for the network to locate devices, facilitating the process of routing data to the correct destination.

While alternatives such as encryption or security for transactions are important aspects of data communications, they are not directly related to the function of an IP address. Similarly, categorizing websites is not a role of IP addresses. Websites may have associated IP addresses, but the primary purpose of the IP address itself is to identify and locate the devices involved in the network, making it critical for Internet functionality.