OSI Model and Error Control Quiz

What layer is responsible for framing in the OSI model?

• Network layer

• Transport layer

• Data link layer

• Physical layer

Which of the following is NOT a service of the data link layer?

• Routing

• Framing

• Flow control

• Error control

What is the main purpose of flow control?

• To detect burst errors

• To assign IP addresses

• To prevent buffer overflow

• To encrypt data

What is used to differentiate frames destined for different systems?

• Checksum

• Port number

• Physical address

• Sequence number

Which of the following is a multiple access protocol?

• DNS

• CSMA/CD

• UDP

• ARP

What does a frame consist of at the data link layer?

• Only payload

• Headers and trailers

• Packets

• Routing tables

Which flow control method waits for an acknowledgment before sending the next frame?

• Go-back-N

• Stop-and-Wait

• Selective Repeat

• Sliding Window

What type of error changes only a single bit?

• Parity error

• Burst error

• Single-bit error

• Random error

What is the term for two or more bits changing during transmission?

• Odd parity

• Packet loss

• Single-bit error

• Burst error

What is redundancy in error control?

• Repeating the entire frame

• Adding extra bits for error detection/correction

• Reducing frame size

• Increasing transmission speed