Routers
Routers connect two or more LANs that use the same or different (usually different) data link protocols and same network protocols
They connect same or different types of cables.
Routers choose the “best” route between networks when there are several to choose from.
Routers are complex “black boxes” or computers and software.
They use addressing schemes distinguishing between device addresses (data link layer) and internetwork addresses (network layer).