A gigabit switch can be connected to a 100Mbps network cable, but only 100Mbps can be used on this line, and it cannot reach gigabit level. (Unless cross-over cables are needed between devices. Network topology refers to the way in which the links and nodes of a network are arranged in relation to each other. There exist combined SFPs that support both 100BASE-FX and 1000BASE-SX, but they are not often used because they cost as much or more then one 100BASE-FX and one 1000BASE-SX transceiver together. 100BASE-FX uses the same fiber cables. In computer networking, Gigabit Ethernet (GbE or 1 GigE) is the transmission of Ethernet frames at a rate of a gigabit per second. The most popular variant, 1000BASE-T, is defined by the IEEE 802. It came into use in 1999 and has replaced Fast Ethernet in wired local networks due to. In 10mbps and 100mbps Ethernet, multi-mode fiber can support up to 2000 meters of transmission distance; In a 1GbpS gigabit network, the multimode fiber can support a transmission distance of up to 550 meters; So multi-mode is now used less. For either cable you should place it in conduit outside (and optionally bury it). For copper you can buy external grade cable. If you want to use fibre then buy a switch with 2 SFP ports for the house and switches with at least one sfp port.