For a network to connect to the Internet, it must use which suite of protocols?

The suite of protocols that allows a network to connect to the Internet is the Transmission Control Protocol/Internet Protocol, commonly referred to as TCP/IP. This set of communication protocols is fundamental for facilitating network communications, enabling devices to exchange data across diverse networks, and ensuring that the data is sent and received reliably.

TCP is responsible for establishing connections and ensuring that data packets are transmitted accurately and in the correct order, while IP deals with addressing and routing packets of data so that they can travel across the network and reach their intended destination. Together, they enable a wide variety of applications and services on the Internet, including web browsing, email, and file sharing.

While the other options listed are important protocols used for specific purposes (like HTTP for web pages, SMTP for sending emails, and FTP for transferring files), they all rely on the underlying TCP/IP suite for their functionality. Without TCP/IP, these protocols would not be able to operate effectively over the Internet. Consequently, TCP/IP is the correct answer for a network to successfully connect to and communicate over the Internet.