PC software is based on specific operating systems and computer hardware. The development of a database requires organizational and conceptual change. LANs are especially vulnerable to network disruption, loss of essential data, access by unauthorized users, and infection from computer viruses. Telecommunications is the communication of information by electronic means. An analog signal is a discrete, rather than a continuous, waveform.
Most computers communicate with analog signals.
Advantages of wireless networks include being less expensive, faster, and having fewer errors than wired networks. Star, bus, and ring are the three most common topologies. Referencing the Internet, all the data, including e-mail messages, databases, and Web sites, are stored on clients. As the sophistication of a system grows, it produces more tangible and less intangible benefits. Systems can be technical successes but organizational failures because of a failure in the social and political process of building the system.