Final answer:
The bulk of the communications activity on the Internet until 1995 was managed primarily by Internet Service Providers (ISPs), such as AOL, which connected users and handled the increasing traffic using various types of connections.
Step-by-step explanation:
Until 1995, the bulk of the communications activity, or traffic, on the Internet was handled primarily by Internet Service Providers (ISPs). Early on, telecommunications and software companies began to create online service providers such as America Online (AOL) which served as gateways to the vast internet network. These ISPs connected users to the internet using standard phone lines and modems and later advanced to employ more robust broadband connections as traffic and the need for more speed and capacity exploded.
During the rapid evolution of the internet, the 1990s also witnessed the birth of the first websites, search engines, and commercial internet platforms. However, it was the ISPs that were pivotal in managing the escalating internet traffic, offering vital connectivity and hosting services to users and businesses. Without the groundwork laid by these ISPs, the Internet's exponential growth and the World Wide Web's rich ecosystem of services would not have been possible.