ZyXEL Communications Corporation NBG2105 Manuel D’Utilisation
Chapter 13 Wireless LAN
NBG2105 User’s Guide
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• Use the Site Survey screen to scan for and connect to a wireless network automatically. (
)
• Use the WPS screen to quickly set up a wireless network with strong security, without having to
configure security settings manually (
• Use the MAC Filtering screen to allow or deny wireless stations based on their MAC addresses
from connecting to the NBG2105 (
).
13.1.2 What You Should Know
Every wireless network must follow these basic guidelines.
• Every wireless client in the same wireless network must use the same SSID.
The SSID is the name of the wireless network. It stands for Service Set IDentity.
• If two wireless networks overlap, they should use different channels.
Like radio stations or television channels, each wireless network uses a specific channel, or
frequency, to send and receive information.
frequency, to send and receive information.
• Every wireless client in the same wireless network must use security compatible with the AP.
Security stops unauthorized devices from using the wireless network. It can also protect the
information that is sent in the wireless network.
information that is sent in the wireless network.
Wireless Security Overview
The following sections introduce different types of wireless security you can set up in the wireless
network.
network.
SSID
Normally, the AP acts like a beacon and regularly broadcasts the SSID in the area. You can hide the
SSID instead, in which case the AP does not broadcast the SSID. In addition, you should change
the default SSID to something that is difficult to guess.
SSID instead, in which case the AP 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 devices to
get the SSID. In addition, unauthorized devices can still see the information that is sent in the
wireless network.
get the SSID. In addition, unauthorized devices can still see the information that is sent in the
wireless network.
Authentication
Authentication is the process of confirming a client’s user name and password when they connect to
a network. Turning off authentication means allowing anyone to connect to the network.
a network. Turning off authentication means allowing anyone to connect to the network.
Encryption
Wireless networks can use encryption to protect the information that is sent in the wireless
network. It is the process of taking data and encoding it, usually using a secret code, so that it
becomes unreadable unless decrypted with the proper code or pass phrase. If you do not know the
secret code, you cannot understand the message.
network. It is the process of taking data and encoding it, usually using a secret code, so that it
becomes unreadable unless decrypted with the proper code or pass phrase. If you do not know the
secret code, you cannot understand the message.