In OSI network architecture, the dialogue control and token management are responsibility of
Which of the following statement is incorrect?
Which of the following is an advantage to using fiber optics data transmission?
Which of the following is required to communicate between two computers?
The transmission signal coding method of TI carrier is called
Which data communication method is used to transmit the data over a serial communication link?
What is the minimum number of wires needed to send data over a serial communication link layer?
Most data communications involving telegraph lines use:
A communications device that combines transmissions from several I/O devices into one line is a
How much power (roughly) a light emitting diode can couple into an optical fiber?
The synchronous modems are more costly than the asynchronous modems because
Which of the following statement is correct?
In a synchronous modem, the digital-to-analog converter transmits signal to the
Which of the following communications lines is best suited to interactive processing applications?
Which of the following signal is not standard RS-232-C signal?
Which of the following does not allow multiple uses or devices to share one communication line?
In OSI network architecture, the routing is performed by
Which of the following performs modulation and demodulation?
The process of converting analog signals into digital signals so they can be processed by a receiving computer is referred to as:
How many OSI layers are covered in the X.25 standard?
Layer one of the OSI model is
The x.25 standard specifies a
Which of the following communication modes support two-way traffic but in only one direction at a time?
Which of the following might be used by a company to satisfy its growing communications needs?
What is the number of separate protocol layers at the serial interface gateway specified by the X.25 standard?
The interactive transmission of data within a time sharing system may be best suited to
Which of the following is considered a broad band communication channel?
Which of the following is not a transmission medium?
A remote batch-processing operation in which data is solely input to a central computer would require