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Exam 8: Data and Network Communication Technology

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Question 21

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In ____ mode, the receiver can communicate with the sender at any time over the second transmission line, even while data is still being transmitted on the first line.

A) half-duplex
B) half-simplex
C) full-duplex
D) full-simplex

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Question 22

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​As bit transmission speed is increased, the duration of each bit in the signal, known as the ____, decreases.

A) ​bit time
B) ​overhead
C) ​block time
D) ​modulation time

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Question 23

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The term ____ describes the maximum number of bits or bytes per second that the channel actually achieves with a specific communication protocol. ​

Parity checking can be expanded to groups of characters or bytes by using ____.

In ____________________ transmission, messages are sent on an as-needed basis.

​What are the two main synchronization problems that can occur during message transmission?

Most local phone service is based on a channel-sharing strategy called ____.

​____ routes signals between two locations through a physical connection, such as copper wire or optical fiber.

​A complete ____ of a sine wave follows its full range from zero to positive peak, back to zero, to its negative peak, and then back to zero again.

Under ____________________ parity, the sender sets the parity bit to 0 if the count of 1-valued data bits is even or to 1 if the count of 1-valued data bits is odd.

​A wave with encoded bits is called a(n) ____________________ wave because it transports bits from one place to another.

​Despite its complexities, packet switching is the dominant form of intercomputer communication.

​Type I error rates can be reduced by combining parity checking and block checking.

​List two characteristics in which error detection and correction methods vary.

​____ transmission uses a separate transmission line for each bit position.

S/N ratio is computed as the log of signal power minus noise power.​

​A(n) ____________________ signal can contain one of a finite number of possible values.

Data messages vary in format and content and can include any primitive CPU data types or more complex data types.​

Square waves can be generated by rapidly switching (pulsing) an electrical or optical power source-a technique called ____.

​Circuit switching makes efficient use of channel capacity in most data transmission situations.