ZyXEL Communications Corporation NBG6616 사용자 설명서

 Chapter 11 Wireless LAN

NBG6616 User’s Guide

The types of encryption you can choose depend on the type of user 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 wireless client in the wireless 
network supports. For example, suppose the AP does not have a local user database, and you do 
not have a RADIUS server. Therefore, there is no user authentication. Suppose the wireless network 
has two wireless clients. Device A only supports WEP, and device B supports WEP and WPA. 
Therefore, you should set up Static WEP in the wireless network.

Note: It is recommended that wireless networks use WPA-PSK, WPA, or stronger 

encryption. IEEE 802.1x and WEP encryption are better than none at all, but it is 

still possible for unauthorized devices to figure out the original information pretty 

quickly.

Note: It is not possible to use WPA-PSK, WPA or stronger encryption with a local user 

database. In this case, it is better to set up stronger encryption with no 

authentication than to set up weaker encryption with the local user database.

When you select WPA2 or WPA2-PSK in your NBG6616, you can also select an option (WPA/
WPA-PSK Compatible) to support WPA/WPA-PSK as well. In this case, if some wireless clients 
support WPA and some support WPA2, you should set up WPA2-PSK or WPA2 (depending on the 
type of wireless network login) and select the WPA/WPA-PSK Compatible option in the 
NBG6616.

Many types of encryption use a key to protect the information in the wireless network. The longer 
the key, the stronger the encryption. Every wireless client in the wireless network must have the 
same key.

Guest WLAN allows you to set up a wireless network where users can access to Internet via the 
NBG6616 (Z), but not other networks connected to the Z. In the following figure, a guest user can 
access the Internet from the guest wireless network A via Z but not the home or company network 
N.

Note: The home or company network N and Guest WLAN network are independent 

networks.

Note: Only Router mode supports guest WLAN. 

Types of Encryption for Each Type of Authentication

No Security

WPA

Static WEP

WPA-PSK

WPA2-PSK

WPA2