Asus USB-N11 - Manual (Page 23)

ASUS WLAN Adapter 2
Chapter  - Software Reference
Chapter

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Config - Authentication
This tab allows you to set the security settings to match those of your AP. It is
configurable only if you have set Network Authentication to WPA or WPA2 in
Config-Encryption tab.
Authentication Type
The authentication type methods include:
PEAP: PEAP (Protected Extensible
Authentication Protocol) authentication is a
version of Extensible Authentication Protocol
(EAP). EAP ensures mutual authentication
between a wireless client and a server that
resides at the network operations center.
TLS: TLS (Transport Layer Security) authentication is used to create an
encrypted tunnel and achieve server-side authentication in a manner similar
to Web server authentication using Secure Sockets Layer (SSL) protocol. This
method uses digital certificates to verify the identity of a client and server.
TTLS: TTLS authentication uses certificates to authenticate the server, while
maintaining similar security properties to TLS such as mutual authentication
and a shared confidentiality for session WEP key.