ZyXEL N4100 Guia Do Utilizador

Chapter 25 Wireless LAN

N4100 User’s Guide

This type of security is fairly weak, however, because there are ways for 
unauthorized wireless devices to get the SSID. In addition, unauthorized wireless 
devices can still see the information that is sent in the wireless network.

Authentication is the process of verifying whether a wireless device is allowed to 
use the wireless network. You can make every user log in to the wireless network 
before they can use it. However, every device in the wireless network has to 
support IEEE 802.1x to do this.

For wireless networks, you can store the user names and passwords for each user 
in a RADIUS server. This is a server used in businesses more than in homes. If you 
do not have a RADIUS server, you cannot set up user names and passwords for 
your users.

Unauthorized wireless devices can still see the information that is sent in the 
wireless network, even if they cannot use the wireless network. Furthermore, 
there are ways for unauthorized wireless users to get a valid user name and 
password. Then, they can use that user name and password to use the wireless 
network.

Wireless networks can use encryption to protect the information that is sent in the 
wireless network. Encryption is like a secret code. If you do not know the secret 
code, you cannot understand the message.

The types of encryption you can choose depend on the type of authentication. 
(See 

 for information about this.)

For example, if the wireless network has a RADIUS server, you can choose WPA or 
WPA2. If users do not log in to the wireless network, you can choose no 
encryption, static WEP, WPA-PSK, or WPA2-PSK.

Usually, you should set up the strongest encryption that every device in the 
wireless network supports. For example, suppose you have a wireless network 
with the N4100 and you do not have a RADIUS server. Therefore, there is no 

Table 50   Types of Encryption for Each Type of Authentication

No Security

WPA

Static WEP
WPA-PSK

WPA2-PSK

WPA2