ZyXEL Communications Corporation AG220 Manual De Usuario

ZyXEL AG-220 User’s Guide

36

Chapter 3 Wireless LAN Network

• Every device in the same wireless network must use security compatible with the AP or 

peer computer.

Security stops unauthorized devices from using the wireless network. It can also protect 
the information that is sent in the wireless network.

Wireless LAN security is vital to your network to protect wireless communications.

Configure the wireless LAN security using the Configuration or the Profile Security Setting 
screen. If you do not enable any wireless security on your AG-220, the AG-220’s wireless 
communications are accessible to any wireless networking device that is in the coverage area. 

Note: You can only use WEP encryption if you set the AG-220 to Ad-hoc or AP mode.

See the appendices for more detailed information about wireless security.

Normally, the AG-220 in AP mode acts like a beacon and regularly broadcasts the SSID in the 
area. You can hide the SSID instead, in which case the AG-220 in AP mode does not 
broadcast the SSID. In addition, you should change the default SSID to something that is 
difficult to guess.

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.

Every device that can use a wireless network has a unique identification number, called a 
MAC address.

1

 A MAC address is usually written using twelve hexadecimal characters

2

; for 

example, 00A0C5000002 or 00:A0:C5:00:00:02. 

To get the MAC address for each device in the wireless network, see the device’s User’s 
Guide or other documentation. You can find the MAC address of the AG-220 by looking at the 
sticker on the bottom of the device. Alternatively, use the utility in AP mode and look at the 
Link Info screen. See 

 for more details. You can also use the 

Association List in the Link Info screen (in AP mode) to get the MAC addresses of other 
wireless devices connected to the AG-220.

1.

Some wireless devices, such as scanners, can detect wireless networks but cannot use wireless 

networks. These kinds of wireless devices might not have MAC addresses.

2.

Hexadecimal characters are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, and F.