A network can substantially simplify internet access for two or more people. The standard networking technology is Ethernet. The NICs are connected with cables which vary depending on the cabling option chosen.
Ethernet comes in two flavors.
NICs can be purchased with any of these interface connectors or even with two or all three connectors. If the NIC has more than one connector a jumper plug or software configuration is usually used to select which connector is in use. The hub has between 4 and 32 RJ-45 jacks. Some hubs provide a BNC connector as well as the RJ-45 jacks. NICs all have a unique address built in at the factory to facilitate this.