What is the minimum number of wires needed to send data over it serial communication link layer?
Which data communication method is used to send data over a serial communication link?
The interactive transmission of data within a time sharing system may be best suited to…..
Which of the following is an example of a bounded medium?
The area of coverage of a satellite radio beam is called its….
Buffering is ________.
The amount of uncertainty in a system of the symbol is called.
Coaxial cable has conductors with _______.
Which of the following statements is incorrect?
What is the main difference between synchronous and asynchronous transmission?
In a synchronous modem, the digital-to-analog converter sends a signal to the _______
The synchronous modems are more expensive than the asynchronous modems because _______.
How much power (approximately) a light-emitting diode can couple into an optical fiber?
The loss in signal power as light travels down the fiber is called.
Multiple repeaters in communication satellites are called.
Avalanche photodiode receiver can detect bits of transmitted data by receiving.
The receive equalizer reduces delay distortions using a _______.
Which section of a synchronous modem contains the scrambler?
The transmission signal coding method for T, the carrier is called _______.
how many bits per symbol are used in the Baudot code?
While transmitting odd-parity coded symbols, the number of zeros in each symbol is….
Which of the following transmission systems provides the highest data rate to an individual device?
One important characteristic of LAN is ____
Which of the following is possible in a token passing bus network?
Which of the following is not a characteristic of the hub architecture of Arc net?
A group of packets from a source through an X.25 packet system to sink.
How many OSI layers are covered in the X.25 standard?
A protocol is a rule governing a time sequence of events that must take place.
What is the number of separate protocol layers at the serial interface gateway specified by the X.25 standard?
Layer one of the OSI model is _______.
Establishing a virtual connection is functionally equivalent to _______.
What is the main purpose of a data link content monitor?
Protocol converters are _______.
Satellite transponders contain ______.
Satellite in geosynchronous orbit…
A spin stabilized satellite.
What frequency range is most affected by fog and precipitation?
In OSI network architecture, the routing is performed by _______
In OSI network architecture, the dialogue control, and token management are responsibilities of _______.
Which of the following is not an example of data communication?
The standard ASCII ______.
Fibre-optic cables operate at frequencies near _______.
HF ratio waves follow how many basic paths on leaving the transmitter?
Transmission of binary signals require _______.
The standard first-level digital multiplex system in the United States operates at _______.
The use of Dataphone Digital Services.
Modulation is _______.