Description: VLSM (Variable Length Subnet Mask) routing is a method that allows dividing an IP address space into subnets of variable sizes, optimizing routing efficiency in various routing protocols. Unlike traditional subnetting techniques that use fixed-length subnet masks, VLSM enables network administrators to allocate IP addresses more efficiently, adapting to the specific needs of each network segment. This means smaller subnets can be created for networks with fewer devices and larger subnets for those requiring more IP addresses. This flexibility not only helps maximize address space usage but also improves traffic management and network security. In the context of link-state routing protocols, VLSM allows for better scalability and a reduction in the number of routes that need to be advertised, resulting in more efficient and faster routing. Implementing VLSM is crucial for large and complex networks, where optimizing IP address usage and routing efficiency is essential for overall network performance.
