Final answer:
Fiber optics is the technology that has enabled the Internet to grow exponentially and support millions of users without overloading the network architecture.
Step-by-step explanation:
The technology that has enabled the Internet to grow exponentially to support millions of users without overloading the network architecture is fiber optics. Fiber optics use thin strands of glass or plastic to transmit data as pulses of light. This allows for high-speed and long-distance communication without degradation of quality.
By using fiber optics, the Internet can handle large amounts of data traffic and provide faster and more reliable connections. This technology has significantly contributed to the growth and scalability of the Internet, allowing it to support the increasing number of users and the data-intensive applications that have emerged.
Furthermore, fiber optics have also paved the way for advancements in other areas such as telecommunication networks, cable television, and data centers, where high-speed transmission is crucial.