| − | A '''Network Switch''' is a telecommunication device which facilitates communication within networks. It is classified as a layer-two device on the [[OSI model]]. It isolates collision domains, and uses MAC addresses to communicate. Broadcasts are not isolated by standard switches, meaning they offer less network security than [[Router (computing)|routers]]. However, some switches can be configured with VLANs, to serve this function. (This requires a layer 3 switch to enable the VLANs to communicate. | + | A '''Network Switch''' is a telecommunication device which facilitates communication within networks. It is classified as a layer-two device on the [[OSI model]]. It isolates collision domains, and uses MAC addresses to communicate. Broadcasts are not isolated by standard switches, meaning they offer less network security than [[Router (computing)|routers]]. However, some switches can be configured with VLANs, to serve this function. (This requires a layer 3 switch to enable the VLANs to communicate.) |