What is the primary function of the Internet Protocol (IP) in the TCP/IP suite?

The primary function of the Internet Protocol (IP) in the TCP/IP suite is to handle logical addressing and packet routing. IP is essential for defining how data packets are addressed and how they are transmitted across networks. It assigns unique IP addresses to devices on a network, allowing the routing of packets from the source to the destination.

When data is sent over the internet, IP packets contain the source and destination addresses, enabling routers to determine the best path for the data to travel. This logical addressing system ensures that information reaches the correct location, regardless of the underlying network infrastructure.

The other options describe functions that IP does not primarily perform. For instance, while security is crucial in data transmission, that role is typically handled by protocols like TLS or SSL. The main application protocols, such as HTTP, FTP, and SMTP, operate at a higher layer in the TCP/IP model, focusing on the specific tasks needed for applications rather than the fundamental transport of data. Lastly, managing database connections involves specialized database management systems and protocols, separate from the core functions of IP.