OSI model layers explained?

The OSI (Open Systems Interconnection) model is a conceptual framework used to understand and standardize the functions of a network system. Enrolling in a CCNA Course provides a comprehensive understanding of these layers, crucial for aspiring networking professionals.
Starting from the bottom, the Physical Layer deals with the physical connectivity of devices, such as cables and network interface cards. Above it, the Data Link Layer ensures reliable data transfer across the physical network, handling error detection and correction.
Moving up, the Network Layer manages routing and addressing, enabling data packets to traverse different networks. The Transport Layer ensures end-to-end communication reliability