IS477 Online Quiz 2

____________ is not a function of a data link protocol.

Amplitude shift keying

The loss of power a signal suffers as it travels from the transmitting computer to a receiving computer is

Attenuation

Parity checking can only detect an error when an even number of bits are switched. Answer Selected Answer:

False

Polling is the process of permitting all clients to transmit or receive at any time.

False

With contention, a computer does not have to wait before it can transmit. A computer can transmit at anytime.

False

Which media is least susceptible to noise?

Fiber optic.

________ is the process of sending a signal to a client that gives its permission to transmit or asks it to receive.

Polling

Crosstalk occurs when the signal transmitted on one circuit or channel of a transmission system creates an undesired effect in another circuit or channel.

True

If a computer transmits a message containing "ABC" and the destination computer receives "abc" as the message, the message is corrupted.

True

In general, controlled approaches work better than contention approaches for large networks that have high usage.

True

Media Access controls refer to the need to control when computers transmit.

True

Media access control is not very important in point-to-point with full duplex configuration

True

One type of forward error correction is the Hamming code

True

Overhead bits are used for error checking and marking the start and end of characters and packets.

True

The data link layer accepts messages from the network layer and controls the hardware that transmits them.

True

The simplest method for error correction is retransmission.

True

Transmission efficiency refers to the percentage of bits transmitted without errors.

True

When we amplify the signal on an analog circuit, we also amplify any noise that is present on the circuit.

True