The 80286 introduced "Protected Mode" in 1982. It was not popular. The mode was difficult to use, lacked paging, and offered no way to return to real mode without a hardware reset. The 80386, arriving three years later, made protection usable -- adding paging, a flat 32-bit address space, per-page User/Supervisor control, and Virtual 8086 mode so that DOS programs could run inside a protected multitasking system. These features made possible Windows 3.0, OS/2, and early Linux.
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Weak Wi-Fi can turn everyday tasks into small frustrations, whether it’s a video call that drops mid-sentence or a stream that refuses to load in certain rooms. If upgrading your router isn’t an option, a Wi-Fi extender can be a practical way to stretch your existing network farther and smooth out coverage gaps — without rewiring your home or rearranging furniture.
Author(s): Jiachen Fan, Shang-Peng Gao