Networks: pt. 4 - Gateway, ARP and routing

Records of my learning about Networks, following the Cisco trail. Gateway Routing ARP ND - Neighbor Discovery Gateway The gateway is an exit port that connects a LAN device to the Internet. Any device can be a gateway, but it is common for the default gateway address to be assigned to the router. But what is this default gateway address? It is basically the router's IP. "Every default gateway is an IP, but not every IP is a default gateway…