Computer Networks Quiz

What is the primary function of the data link layer?

• Network routing

• Data storage

• Node-to-node communication

• Data encryption

What does a single-bit error refer to?

• No bits change in a data unit

• Two bits change in a data unit

• All bits change in a data unit

• One bit changes in a data unit

Which coding scheme is used to detect and correct errors?

• Sequential coding

• Random coding

• Linear coding

• Block coding

What is the minimum Hamming distance required for error detection of s errors?

• s - 1

• 2s

• s

• s + 1

In the context of error detection, what does the term 'redundancy' refer to?

• The removal of bits

• The use of extra bits

• The encryption of data

• The compression of data

What is the purpose of a parity bit in a Simple Parity-Check Code?

• To encrypt the data

• To ensure even number of 1s

• To compress the data

• To increase data size

What is the main advantage of cyclic codes?

• They require less memory

• They can detect single-bit errors only

• They are easy to implement

• They can detect burst errors effectively

What is the checksum technique primarily used for?

• Data encryption

• Error detection

• Data storage

• Data compression

In a Stop-and-Wait protocol, what does the sender do after sending a frame?

• Waits for an acknowledgment

• Terminates the connection

• Resends the frame

• Sends another frame immediately

What is the role of the primary station in a polling system?

• To receive data only

• To ignore secondary stations

• To control the link

• To send data only