A LAN (Local Area Network) is essentially a web of interconnected devices within a limited physical space, like a building, office, or even your home. Think of it as a mini internet within your own walls! The size of a LAN can vary greatly. On the smaller end, you have your home network, where your laptop, phone, and maybe a smart TV might be connected. On the larger scale, imagine an office network with hundreds of computers, printers, servers, and other devices all talking to each other. Schools and universities also have extensive LANs to connect their various departments and facilities.