CN Quiz-4

What is the primary goal of the Reliable Data Transfer (RDT) protocol?

• Minimize bandwidth usage

• Ensure data is delivered correctly and in order

• Improve network congestion

• Reduce data redundancy

Which of the following layers primarily handles reliability in networking?

• Physical layer

• Network layer

• Transport layer

• Application layer

In rdt1.0, what is assumed about the channel?

• It introduces errors

• It drops packets

• It is perfectly reliable

• It reorders packets

What function is not needed in rdt1.0?

• Error detection

• Acknowledgments

• Retransmission

• All of the above

Which mechanism does rdt2.0 introduce to handle errors?

• Flow control

• Checksums and acknowledgments

• Sequence numbers

• Encryption

What does a NAK (Negative Acknowledgment) indicate in rdt2.0?

• Successful packet reception

• Corrupted packet received

• Packet loss

• Window is full

What is the primary issue addressed in rdt2.1?

• Duplicate packets due to corrupted ACK/NAK

• Packet loss

• Buffer overflow

• High transmission delay

In rdt2.1, what solution is introduced to handle duplicate packets?

• Error correction codes

• Sequence numbers

• Larger buffer sizes

• Selective retransmission

What is the minimum sequence number size required for rdt2.1?

• 8 bits

• 4 bits

• 1 bit

• 16 bits

What additional problem does rdt3.0 handle compared to rdt2.1?

• Packet loss

• Data corruption

• Encryption

• Congestion control