Q. Computers cannot communicate with each other directly over telephone lines because they use digital pulses whereas telephone lines use analog sound frequencies. What is the name of the device which permits digital to analog conversion at the start of a long distance transmission?

View solution

Q. Demodulation is a process of

View solution

Q. Demodulation is the process of

View solution

Q. A devices that links two homogeneous packet-broadcast local networks, is

View solution

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

View solution

Q. Which of the following device copies electrical signals from one Ethernet to another?

View solution

Q. For connecting modem, a computer must be equipped with a port that conforms to the RS-232 standard of the Electronic Industries Association of America. What do the letters 'RS' stand for?

View solution

Q. If communication software can be called the "traffic cop" of a micro communication system, then what should the modem be called?

View solution

Q. The fundamental requirements of private-to-public network interconnection methods which need to be provided in gateways is/are

View solution

Q. Interconnected networks need communication processors such as switches, routers, hubs, and gateways. Select the best fit for answer:

View solution

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. Now-a-days computers all over the world can talk to each other. Which is one of the special accessories essential for this purpose?

View solution

Q. Devices on one network can communicate with devices on another network via a

View solution

Q. What is the name of the device that connects two computers by means of a telephone line?

View solution

Q. The _____ layer is the layer closest to the transmission medium.

View solution

Q. Which of the following allows devices on one network to communicate with devices on another network?

View solution

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

View solution

Q. A form of modulation In which the amplitude of a carrier wave is varied in accordance with some characteristic of the modulating signal, is known as

View solution

Q. A modulator converts a _____ signal to a(n) _____ signal.

View solution

Q. Repeaters are often used on an 802.3 network to help strengthen the signals being transmitted. As with the length of segments and the number of segments, a limit exists as to how many repeaters can be used between any two nodes. What is the maximum number of repeaters that can be used?

View solution