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