Computer Networks Quiz

What is the principal service function of the data link layer?

• Encrypt data for secure transmission

• Control the flow of data within the network layer

• Handle physical layer errors

• Transfer data from the network layer on the source machine to the network layer on the destination machine

Which service offered by the data link layer does not require the receiver to return acknowledgments to the sender?

• Unacknowledged connectionless service

• Acknowledged connectionless service

• Acknowledged connection-oriented service

• Error Correction service

What is the purpose of Byte Count Framing Method in the data link layer?

• Detect errors in the frame

• Specify the number of bytes in the frame

• Control the flow of data within the frame

• Add redundancy bytes at the start/end of the frame

Which error detection method involves adding extra bits for detecting errors at the destination?

• Longitudinal Redundancy Check

• Cyclic Redundancy Check

• Vertical Redundancy Check

• Checksum

What is the purpose of the Internet Checksum mechanism?

• Error Detection

• Error Correction

• Flow Control

• Data Encryption

Which technique for error correction involves retransmission of data by the sender?

• Checksum

• Hamming Codes

• Forward Error Correction (FEC)

• Retransmission (Backward error correction)

In a Stop-and-Wait protocol, what does the sender do after the sender timer expires?

• Continue sending frames

• Wait for the receiver to send an ACK

• Send a Negative Acknowledge (NAK)

• Retransmit the frame in error

What is the advantage of Selective-Repeat ARQ over Go-Back-N ARQ?

• Less complexity at sender and receiver

• Fewer Retransmissions

• Simpler implementation

• Faster data transmission

What is the purpose of pipelining in data transmission protocols?

• Improve error detection

• Increase the complexity of the protocol

• Reduce the number of frames transmitted

• Keep the line busy instead of waiting

What is the maximum window size for a protocol using m-bit sequence numbers?

• 2^m - 1

• 2^m

• m^2

• m + 1