# Cisco WLC WPA2 PSK Authentication

**URL:** https://forum.networklessons.com/t/cisco-wlc-wpa2-psk-authentication/8739
**Category:** Lessons Discussion
**Created:** [November 3, 2019, 1:41pm UTC](https://forum.networklessons.com/t/cisco-wlc-wpa2-psk-authentication/8739 "2019-11-03T13:41:54Z")
**Posts on this page:** 1
**Showing post:** 5

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### Author: ![lagapidis](https://cdn-forum.networklessons.com/user_avatar/forum.networklessons.com/lagapidis/32/4949_2.png) [@lagapidis](https://forum.networklessons.com/u/lagapidis)
#### Post date: [August 29, 2020, 7:10am UTC](https://forum.networklessons.com/t/cisco-wlc-wpa2-psk-authentication/8739/5 "2020-08-29T07:10:33Z")

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Hello Mina

Before answering your question, I suggest you go through the following two lessons that will most likely clarify some of your questions about certificates:

> **[Introduction to Wireless Security](https://networklessons.com/cisco/ccna-200-301/introduction-to-wireless-security)**
>
> This lesson is an introduction to wireless security and explains authentication, encryption, and the message integrity check.

> **[Wireless Authentication Methods](https://networklessons.com/cisco/ccna-200-301/wireless-authentication-methods)**
>
> This lesson explains the basics of wireless authentication including open, WEP, 802.1x/EAP, LEAP, EAP-FAST, PEAP, and EAP-TLS.

For this particular question:

> [@maher.mina](#):
>
> why we really need to install a root CA in our devices?

It really depends upon the method of authentication that you are using. In the wireless authentication lesson, you will see that for PEAP, you don’t need a certificate in the user devices, while EAP-TLS does.

I hope this has been helpful!

Laz

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