Email helps us to send and receive messages through video conferencing.

The degeneration of a signal over a distance on a network is called attenuation.

When two entities are communicating and do not want a third party to listen, this situation is defined as secure communication.

A computer network …………… .

1. Is a collection of hardware components and computers
2. Is interconnected by communication channels
3. Allows sharing of resources and information
4. All of these