MCQ Detailed View

The Data Link Layer in the OSI model is divided into two sublayers: MAC (Media Access Control) and LLC (Logical Link Control). Each sublayer has a specific role in handling how data is sent over the physical network.

1. MAC (Media Access Control): This sublayer is responsible for controlling how devices on a network gain access to the medium and permission to transmit data. It deals with physical addressing using MAC addresses, and it ensures that frames are delivered to the correct device.

2. LLC (Logical Link Control): The LLC sublayer manages communication between the Data Link Layer and the Network Layer. It handles error detection, flow control, and provides a way for multiple network protocols to share the same physical link.

Key Points:

• MAC = Controls access to the physical medium, uses MAC addresses


• LLC = Provides error detection and protocol multiplexing


• Both work together to ensure smooth data transfer within a local network

Conclusion: The two sublayers of the Data Link Layer are MAC and LLC. Together, they manage data framing, addressing, and reliable delivery over local networks.