What device would be recommended for a customer who wants to share a monitor, mouse, and keyboard between two computers?

A KVM (Keyboard, Video, Mouse) switch is specifically designed to allow multiple computers to share a single monitor, keyboard, and mouse setup. This is particularly useful in environments where users need to efficiently manage multiple systems without the need for additional peripherals.

When a KVM switch is employed, it enables the user to switch between different computers using the same set of peripherals. This not only saves desk space but also reduces clutter related to multiple devices. Many KVM switches offer additional features such as hotkey switching, allowing quick transitions between systems, and some even support audio sharing.

In contrast, a router is used to connect multiple devices to a network and share internet access but does not directly share peripherals like a monitor or keyboard. A hub simply connects multiple Ethernet devices on a network to function as a single network segment, without any capability to connect peripherals like a KVM switch can. A network switch is similar to a hub but operates more efficiently at a data level, directing data packets to their intended destination, again without the ability to share peripherals.

Thus, the KVM switch is the ideal solution for sharing a monitor, mouse, and keyboard between two computers.