What is a subnet mask, and how does it relate to IP addresses?
Hey Alex
A subnet mask, often represented in dotted-decimal notation like 255.255.255.0, plays a pivotal role in IP networking by enabling the segregation of IP addresses into network and host identifiers. When an IP address is paired with a subnet mask, it delineates the scope of the network, aiding in routing and IP address management. By applying a logical AND operation between the IP address and the subnet mask, the network address is extracted, which is crucial for routing decisions within and between networks. Subnetting, facilitated by varying subnet masks, allows for the efficient utilization of IP address space, enhances network security, and improves network performance by reducing congestion. The concept of subnetting and subnet masks is fundamental in creating scalable, organized, and manageable network architectures, catering to different network sizes and requirements.