Advance Hardware
What is switch?
A switch is an 'intelligent hub' that has the ability to determine the destination MAC address of a packet. Instead of passing the packet to all ports, the switch forwards it only to the port to which it is addressed. Thus, a switch can drastically reduce network traffic
A switch maintains a list of MAC address associated with its various ports that it uses to determine where to send the packet. Because it operates on the MAC address rather than an IP address, a switch is generally faster than a router.