What is the main advantage of using Classless

Solution

(Classless Inter-Domain Routing) was introduced to solve the problem of IP address exhaustion in IPv4. Unlike class-based addressing, where IP addresses were rigidly divided into classes (A, B, C), CIDR allows the use of variable-length subnet masks (VLSM) to allocate IP addresses more flexibly. With CIDR, organizations can create subnets with a more tailored number of IP addresses, reducing waste and optimizing IP allocation across networks. This efficiency in IP allocation is critical, especially in large-scale networks and the internet. Why other options are wrong: a) It simplifies the configuration of routers and network devices : CIDR can actually add complexity to network configuration due to variable-length subnet masks. c) It eliminates the need for subnet masks entirely : CIDR still uses subnet masks but allows flexibility in their length. d) It assigns a unique IP address to every device on a network : IP assignment depends on network configurations, and CIDR does not inherently assign unique addresses. e) It enhances network security by isolating devices in different subnets : CIDR is mainly focused on IP address allocation, not directly on security.