Exam 6: Errors, Error Detection, and Error Control

Installing special filters for analog signals and digital signal regeneration for digital signals helps in preventing white noise.

Simple parity comes in two basic forms: even parity and ____________________ parity.

____ for error control is becoming a mode of operation for some modern wide area network transmission techniques.

Error bursts occur ____ percent of the time.

High humidity and wet weather can cause an increase in electrical ____ over a telephone system.

With ____ parity,the 0 or 1 added to the string produces an even number of binary 1s.

____ means that if the transmitting modem sends data and the data arrives garbled,the receiving modem may ask the transmitting modem to fall back to a slower transmission speed.

Error detection can be performed in several places within a communications model.One of the most common places is the TCP/IP ____ layer.

A ____ protocol's function is simply to inform the transmitter what piece of data is expected next.

List and briefly explain some error-prevention techniques.

____ is the result of small timing irregularities that become magnified during the transmission of digital signals as the signals are passed from one device to another.

____ cable is the medium least prone to generating errors.

Typically,impulse noise is a(n)____ burst of energy.

____ error control is a technique usually associated with the Stop-and-wait flow control protocol.

The CRC method catches almost 100% of errors.

With the sliding window protocol,a station that had a maximum window size of 7 could transmit only ____ data packets at one time before it had to stop and wait for an acknowledgment.

Causes of jitter can include electromagnetic interference,____,passing the signal through too many repeaters,and the use of lower-quality equipment.

When a parity bit is assigned to ASCII,the Hamming distance becomes 4.

Installing proper shielding on cables prevents ____.

____________________ is a noncontinuous noise and one of the most difficult errors to detect,because it can occur randomly.