In this video, you’ll learn about the Data Link Layer (Layer 2) of the OSI model and how it ensures reliable data transfer between devices on the same network. The lesson explains how this layer uses MAC addresses for device identification and handles the framing of data for transmission over physical media.

You’ll also explore how the Data Link Layer is divided into two sublayers: Logical Link Control (LLC), which manages error detection and flow control, and Media Access Control (MAC), which defines how devices access the network medium. Key technologies like Ethernet, switches, ARP, and VLANs are also introduced at this layer.

By the end of this video, you will understand how the Data Link Layer provides error detection, physical addressing, and proper delivery of frames, making it a crucial foundation for reliable communication in local area networks (LANs).