Routers, by default , will not forward any broadcast or multicast packets.
Routers use the logical address in a Network layer header to determine the next hop router to forward to the packet to.
Router can use access lists, created by an administrator, to control security on the types of packets that are allowed to enter or exit an interface.
Routers can provide layer 2 bridging functions if needed and can simultaneously route through the same interface.
Layer 3 devices provide connections between virtual LANs.
Routers can provide quality of service for specific types of network traffic.
