The simplest Internet-connected LANs require only a router and a way for computing devices to connect to the router, such as via Ethernet cables or a Wi-Fi hotspot. LANs without an Internet connection need a switch for exchanging data. Large LANs, such as those in a large office building, may need additional routers or switches to more efficiently forward data to the right devices. Not all LANs connect to the Internet. In fact, LANs predate the Internet: the first LANs were used in businesses in the late 1970s. (These old LANs used network protocols that are no longer in use today.) The only requirement for setting up a LAN is that the connected devices are able to exchange data. This usually requires a piece of networking equipment for packet switching, such as a network switch. Today, even non-Internet-connected LANs use the same networking protocols that are used on the Internet (such as IP).