Wifi protocols(versions): 802.11b= first wifi in the market. 802.11g=second wifi in the market. 802.11n=third wifi in the market. . 802.11ac=fourth wifi in the market. What speed is posible to get in each of them? 802.11b= 8 mbps 802.11g= 54 mbps 802.11n= 300 or 600 mbps. 802.11ac= 1`3 gbps What do you need to connect to the Internet through Wifi? Wireless NIC AP Router wifi SSID (Service Set Identifier) Wifi security: OPEN WEP WPA WPA2