What is the main role of the Data Link Layer?

• Routing packets

• Node-to-node communication

• Encrypting data

• Managing IP addresses

Which of the following is a key function of the Data Link Layer?

• IP addressing

• DNS resolution

• Framing data

• Email forwarding

Bit-oriented framing is used by which protocol?

• PPP

• TCP

• HDLC

• SMTP

Byte-oriented framing divides data based on:

• Frequency

• Voltage

• Bits

• Bytes

Which protocol is an example of byte-oriented framing?

• HDLC

• PPP

• FTP

• SMTP

Parity checks are used to:

• Route data

• Store data

• Detect single-bit errors

• Encrypt messages

Even parity ensures:

• Number of 1s is even

• Data is compressed

• No errors occur

• Packet order is maintained

CRC stands for:

• Code Redundant Circuit

• Cyclic Redundancy Check

• Central Routing Circuit

• Current Redundancy Cycle

Which error detection method is commonly used in Ethernet frames?

• Hamming code

• Checksum

• CRC-32

• Parity

What happens if the CRC check at the receiver is non-zero?

• Accept data

• Resend data

• Reject data

• Encrypt data