CN_Quiz 1

Which layer in the OSI model is responsible for node-to-node delivery?

• Physical Layer

• Data Link Layer

• Network Layer

• Transport Layer

Framing in the Data Link Layer helps in:

• Error correction

• Encryption of data

• Identifying the start and end of data

• Routing packets

In character count framing, loss of synchronization occurs when:

• Data field is corrupted

• Count field is corrupted

• Header is missing

• Trailer is missing

Byte Stuffing uses which additional character for transparency?

• ACK

• FLAG

• ESC

• NAK

In Bit Stuffing, which flag pattern is used to mark frame boundaries?

• 01111111

• 01111110

• 01010101

• 11111111

The main purpose of transparency in framing is to:

• Compress data

• Encrypt data

• Improve transmission speed

• Prevent confusion between data and control information

The simplest error detection method is:

• CRC

• Checksum

• Parity Check

• Hamming Code

Which error detection technique uses polynomial division?

• CRC

• Parity Check

• Checksum

• Hamming Code

Hamming code can:

• Detect 1-bit errors only

• Correct 1-bit and detect 2-bit errors

• Detect burst errors

• Correct burst errors

In Stop-and-Wait protocol (noiseless channel), after sending one frame, the sender:

• Sends the next frame immediately

• Sends all frames at once

• Retransmits all frames

• Waits for ACK before sending next frame