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A router connects multiple computers together and transmits data to its correct destination on a network.
router
a hub
Switch networking is a term used to describe a small hardware device that joins multiple computers together by using a low level network protocol level.
A KVM switch, or Keyboard, Video and Mouse switch, is a type of hardware device that allows multiple input devices to be shared between multiple computers, thus allowing control of multiple computers. Although it is usually multiple computers that are connected to the KVM, typically only a small number is controlled at any time. They are often used between different OSes, when a person has switched to a new OS and plans to continue using their original OS.
A switch is typically used to connect multiple computers in a single residential unit to a modem.
keyboard
This is the definition of a computer network. Devices such as routers and bridges create logical network subnets and network domains that computers, printers, and other devices can connect with to join the network.
The hub is a device for connecting multiple ethernet devices together and making them act as a single network segment.
Server
A hub is a hardware device used to connect several computers together.
Pretty much everything we use is a computer, whether they're programmable or not. game controllers have computers. smartphones are computers. monitors have computers in them. TVs also do. Cars have them. and of course, calculators are computers also.