At present more personal way to broadband access, ADSL, ADSL access and therefore we will explain to the simple. Now ADSL cat purchased most of the routing function (when many manufacturers in the factory routing function of shielding, because the telecommunications installation is mostly not enable routing capabilities, enabling DHCP. Open ADSL routing functions), if the individual online or minority ADSL itself by a few units can, if the computer you just need to buy more of one or more hubs or switches. Today, taking into account the price difference between hub and switch is very small, not a special reason, please buy a switch. You do not need to pursue expensive, because the product homogeneity is very serious now, I switch the cheapest now without any problem. Give you a reference offer, I suggest you buy an 8-port, to meet the expansion needs of the general price 100 yuan. Connected to the switch, all computers and then switch on the line received. The remaining have to do only the network cable is inserted into each machine interface of the switch, the cat's network cable into uplink interfaces. Then set the routing function, DHCP, etc., can be shared online.