Summary Telecommunications and Networks Latest Verified Review 2023 Practice Questions and Answers for Exam Preparation, 100% Correct with Explanations, Highly Recommended, Download to Score A+

Telecommunications and Networks Latest Verified Review 2023 Practice Questions and Answers for Exam Preparation, 100% Correct with Explanations, Highly Recommended, Download to Score A+ Telecommunications is the communication of information in any form (voice, data, text, images, audio and video) by electronic means, usually over some distance. Previously, Telecommunications meant voice transmission over telephone lines. Today, a great deal of telecommunications transmission is digital data transmission in which computers transmit data from one location to another. People wish to connect computers together for reasons that include:  Users working at their own computers, often in different locations, have access to programs, files, data from a data base, documents, and the like that are stored elsewhere. The users can also communicate using e-mail or "talk" services, or they can use groupware to work together on documents.  It is often desirable to share valuable resources such as printers, a large disk facility, programs, or a database among two or more computers, or programs. Networks enable users to tap into numerous databases, whether private company databases or public databases available online through the Internet  Users may connect their computers to powerful computer resources, such as CompuServe, Dow Jones News, other on-line services, the Internet, or computer bulletin boards to access and retrieve information, obtain support services, conduct business, purchase goods, discuss common interests, play games, or simply socialize.  Computers can be used together to increase system reliability by providing redundant processing. Two or more CPUs can be executing the same program, and the results can be compared by the computers continuously. Connecting computers together also makes it possible to switch processing to a backup computer in the event of failure of a CPU. Such systems are called fault-tolerant systems. Fault-tolerant systems often provide redundancy on other devices, such as disks, as well.