Q. What is the name of the device that converts computer output into a form that can be transmitted over a telephone line?

View solution

Q. If the bandwidth of a signal is 5 KHz and the lowest frequency is 52 KHz, what is the highest frequency?

View solution

Q. The unit that is used to express the state of a signal is

View solution

Q. The physical layer, in reference to the OSI model, defines

View solution

Q. ________ uses two carriers, one in-phase and the other quadrature.

View solution

Q. RS-449/442-A/423-A is

View solution

Q. If a periodic signal is decomposed into five sine waves with frequencies of 100, 300, 500, 700, and 900 Hz, what is its bandwidth?

View solution

Q. The physical layer is concerned with the movement of _______ over the physical medium.

View solution

Q. What is the main function of DSLAM?

View solution

Q. What is the bit rate for high-definition TV (HDTV)?

View solution

Q. If signal does not change at all, its frequency is

View solution

Q. The constellation diagram of BPSK has ______ dots.

View solution

Q. The black and white TV is an example of

View solution

Q. Increasing the levels of a signal may reduce the

View solution

Q. which of the following devices is used to connect different network segments and manage the traffic between them?

View solution

Q. If the available channel is a ____ channel, we cannot send a digital signal directly to the channel.

View solution

Q. The Federal Communications Commission (FCC) allows ______kHz for each AM station.

View solution

Q. Quadrature amplitude modulation (QAM) is a combination of ___________.

View solution

Q. Which of the following devices takes data sent from one network device and forwards it to all devices on the network regardless of the intended recipient?

View solution

Q. The first step in PCM is ________.

View solution