Q. _______ is designed to be used in wireless applications in which stations must be able to share the medium without interception by an eavesdropper and without being subject to jamming from a malicious intruder.

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Q. The _______ technique uses M different carrier frequencies that are modulated by the source signal. At one moment, the sign modulates one carrier frequency; at the next moment, the signal modulates another carrier frequency.

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Q. The ______ technique expands the bandwidth of a signal by replacing each data bit with n bits.

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Q. DMT is a modulation technique that combines elements of _______ and _______.

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Q. Which of the following statement is incorrect?

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Q. A band is always equivalent to ...............

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Q. .................... type of multiplexing are used by transport layer to improve transmission efficiency.

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Q. Multiplexing of different transport connections onto the same network connection is called ................

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Q. A single transport layer connection split and connects the different network connections is called .........................

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Q. Which of the following does not allow multiple users or devices to share one communications line?

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Q. The term 'duplex' refers to the ability of the data receiving stations to echo back a confirming message to the sender. In full duplex data transmission, both the sender and the receiver

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Q. A remote batch-processing operation in which data is solely input to a central computer would require a:

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Q. The communication mode that supports two-way traffic but only one direction at a time is

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Q. Which of the following divides the high speed signal into frequency bands?

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Q. The difference between a multiplexer and a statistical multiplexer is

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Q. A network designer wants to connect 5 routers as point-to-point simplex line. Then the total number of lines required would be

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Q. A communications device that combines transmissions from several I/O devices into one line is a:

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Q. Which of the following technique is used for allocating capacity on a satellite channel using fixed-assignment FDM?

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Q. An ROP would be attached to a

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Q. The communication mode that supports data in both directions at the same time is

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