Type and Methods of Data TransmissionQuiz

What is simplex transmission?

• Data travels in both directions but not at the same time.

• Data travels over long distances.

• Data travels in only one direction.

• Data travels in both directions at the same time.

Answer explanation

Simplex transmission refers to data communication where information flows in only one direction. This means that the correct choice is 'Data travels in only one direction.' Other options describe different types of transmission.

Which type of transmission allows data to travel in both directions but not at the same time?

• Simplex

• Duplex

• Serial

• Half duplex

Answer explanation

Half duplex allows data to travel in both directions, but only one direction at a time. This is different from duplex, which allows simultaneous two-way communication.

What is the most common form of data transmission?

• Parallel

• Duplex

• Half duplex

• Simplex

Answer explanation

Duplex is the most common form of data transmission as it allows for simultaneous two-way communication, making it more efficient than simplex (one-way) and half duplex (alternating).

In serial data transmission, how are bits sent?

• All at once down multiple cables.

• One at a time down a single cable.

• Only over short distances.

• In both directions simultaneously.

Answer explanation

In serial data transmission, bits are sent one at a time down a single cable, allowing for simpler wiring and reduced interference compared to parallel transmission, where multiple bits are sent simultaneously.

What is a key advantage of serial transmission?

• Sends multiple bits at once.

• Minimal interference.

• Can be used over long distances.

• Faster than parallel transmission.

Answer explanation

A key advantage of serial transmission is minimal interference. Since it sends bits one at a time over a single channel, it reduces the chances of crosstalk and signal degradation, making it more reliable for long-distance communication.

What is a disadvantage of parallel transmission?

• Higher cost of production.

• Can only be used over very short distances.

• More interference than serial.

• Slower than serial transmission.

Answer explanation

A key disadvantage of parallel transmission is that it can only be used over very short distances due to signal degradation and interference. This limits its practical applications compared to serial transmission, which can cover longer distances.

What does Skew refer to in data transmission?

• Speed of data transmission.

• Time difference in sequence of data arrival.

• Type of cable used.

• Direction of data flow.

Answer explanation

Skew in data transmission refers to the time difference in the arrival of data packets. This can affect the synchronization of data streams, making the correct choice 'Time difference in sequence of data arrival.'

Which of the following is a characteristic of parallel data transmission?

• Sends bits simultaneously.

• More reliable over long distances.

• Slower than serial transmission.

• Uses a single cable.

Answer explanation

Parallel data transmission sends bits simultaneously, allowing for faster data transfer compared to serial transmission, which sends bits one at a time. This characteristic is key to its efficiency.

What is the main reason parallel cables are not commonly used anymore?

• They are too expensive.

• They can cause bits to arrive out of sequence.

• They can only transmit in one direction.

• They are slower than serial cables.

Answer explanation

Parallel cables can cause bits to arrive out of sequence due to timing issues, making them less reliable than serial cables, which transmit data in a single stream, ensuring proper order and synchronization.

Which type of transmission is typically found on network cables?

• Duplex

• Simplex

• Serial

• Half duplex

Answer explanation

Duplex transmission allows data to be sent and received simultaneously, making it ideal for network cables. This contrasts with simplex (one-way), half duplex (one direction at a time), and serial (data sent one bit at a time).