Logical Link Control (LLC) is a data link layer protocol used in many Ethernet networks. It provides error detection and correction, flow control, and frame sequencing. LLC is often implemented in hardware, making it efficient and reliable.

LLC supports the multiplexing of traffic from different upper-layer protocols over a single physical link. This allows different types of traffic to share the same bandwidth on the link while still maintaining isolation between them. LLC also provides flow control to prevent congestion and ensure smooth communication between devices on the network.

Frame sequencing is another important feature of LLC that helps maintain order in Ethernet frames being transmitted over the network. This ensures that each frame arrives at its destination in the correct order, avoiding any potential confusion or errors.