Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Fast switch

You need one router on a home network. The modem plugs into it. The router provides DHCP to assign NAT addresses. A switch has two uses:.. If you need more jacks than your router provides... If you have a long ethernet cable to another room where you need more than oneconnection... In an office that has one jack and you need more than one.