I. Discuss installing Internet connections, which requires using leased lines or other data channels provided by common carriers, and therefore these connections are usually permanent and secured under the requirements of a formal service agreement.
II. Explain how, in the past, organizations provided remote connections exclusively through dial-up services like Remote Authentication Service (RAS). Since the Internet has become more widespread in recent years, other options, such as Virtual Private Networks (VPNs), have become more popular.
III. Stress that as more employees work from home or elsewhere, the need for VPNs greatly increases.