About Grubhub. Grubhub helps you find and order food from wherever you are. How it works: you type in an address, we tell you the restaurants that deliver to that locale as well as showing you droves of pickup restaurants near you. Want to be more specific? Search by cuisine, restaurant name or menu item.
The main purpose of a router is to connect multiple networks and forward packets destined either for its own networks or other networks. A router is considered a Layer 3 device because its primary forwarding decision is based on the information in the Layer 3 IP packet, specifically the destination IP address.
edge router. An edge router (also called access router) is a network device located at the boundary of a network that connects to external networks, wide area networks (WANs) and the internet. Typically the edge router sends or receives data directly to or from other organizations' networks.