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.
A router is an intelligent connecting device that can send packets to the correct LAN segment to take them to their destination. Routers link LAN segments at the network layer of the OSI Reference Model for computer to computer communications. The networks connected by routers can use similar or different networking protocols. The most popular interior routing protocol is OSPF and the most popular exterior routing protocol is BGP.