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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 (each port is a separate collision domain), and uses MAC addresses to communicate. However, broadcasts are not isolated by standard switches, meaning they offer less network security than [[Router (computing)|routers]]. Some switches can be configured aftermarket with VLANs to serve this function, but it is not a default function. (This requires a layer 3 switch to enable the VLANs to communicate.)
[[Category:Networking]]
[[Category:Networking]]