WIFI SECURITY

-Protocols/version of the WIFI: it's always 802.11 followed by a letter. Ther first one was b, then g, then n and finally, which is the current one; ac. these letters indicate the WIFI's speed.
This is an example of an internet card in which the protocol is indicated:

The aproximatly speed that indicate those letters is:
b: 11 Mbps
g: 54 Mbps
n: 600 Mbps
ac: 1'3 Gbps
Anyway, this speed is not exactly, it can changes but only a little bit.

The name of the WIFI is called SSID (Server Set Identifier). I mean, the names that appear to you in a list for example when you try to connect your smartphone, tabler or computer to a router. Those names are SSID's.

To connect to the Internet through Wifi you need:
-  Wireless NIC
-   AP
-   Router

About wifi security, we must know how to restinct the access to our router using an autentication password and you must also take care with confidentiality, because you don't want other people to know data about yo through ypur router. There are four metods to follow to keep yout security:

1-Open: there must be a password, if there is no autentication, there is no confidentially either.

2-WEP 

3-WPA

4-WPA2