Private switches

A Private Switch, also known as private VLAN or port isolation, is a technique used in computer networking where switch ports are restricted so that they can only communicate with assigned uplinks. In this case, the restricted ports are called private ports and each private switch will contact many private ports and a single uplink. The uplink will always be a port connected to a router, firewall, server, provider network or some central resource or hub. A private switch works to provide isolation ports of the same broadcast domain. A good example of private switch is the use of internet in hotels. In this case, each hotel room has their own access but data is not exchanged, nor is the hotel’s network at risk by any shared communication.