A subnet mask is a value that divides the IP address in the network part and host part for devices to determine whether the packet needs to be routed to a different network. The main advantage of the subnet mask is it leads to an organized network structure, reduces network traffic, and enables efficient communication of data between devices. Subnet mask is a core concept for every CCNA aspirant. FITA Academy’s network training will cover all aspects of networking, including subnetting, with live practical labs and real-time examples.
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