How does a internet traffic get from the Web to a computer or vise versa? Nearly all computers find their way into a Switch with rare exceptions of being routed directly through a Modem. The Network Switch goes by many names and you may have heard of a few; you can find them as a Switch, Hub and even your home Router is often a Switch combined with a Router.
Switches are necessary for a network to function and expand properly, without it you will be unable to go beyond the number of Ports on the back of your router for your wired devices. What the Switch is capable of is very simple in nature, however, it is as vital as your router itself. It will take all your wired traffic, and expand your possible connected devices considerably, often with as many as 24 to 48 extra devices.