Which OSI layer handles frames rather than packets or segments?

Which OSI layer handles frames rather than packets or segments?

• A. Physical Layer (Layer 1)
• B. Data Link Layer (Layer 2)
• C. Network Layer (Layer 3)
• D. Session Layer (Layer 5)

Answer: (B)

Frames are the data unit used at the Data Link Layer. This layer sits between the Physical Layer, which transmits raw bits, and the Network Layer, which handles packets. The Data Link Layer encapsulates packets from the Network Layer into frames, adding a header with MAC addresses and a trailer with error-checking (CRC). It also manages access to the shared medium and detects certain errors, enabling reliable communication on a single link. Since frames are defined as the unit of data at this layer, the Data Link Layer is the one that handles frames rather than packets or segments. The Network Layer handles packets; the Transport Layer handles segments; the Session Layer handles session management; the Physical Layer transmits bits.

Frames are the data unit used at the Data Link Layer. This layer sits between the Physical Layer, which transmits raw bits, and the Network Layer, which handles packets. The Data Link Layer encapsulates packets from the Network Layer into frames, adding a header with MAC addresses and a trailer with error-checking (CRC). It also manages access to the shared medium and detects certain errors, enabling reliable communication on a single link. Since frames are defined as the unit of data at this layer, the Data Link Layer is the one that handles frames rather than packets or segments. The Network Layer handles packets; the Transport Layer handles segments; the Session Layer handles session management; the Physical Layer transmits bits.