Signal Problems - ZyXEL Communications XMG3512-B10A User Manual

7.9.3.4 Enc ryptio n
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
page 100 for information about this.)
Table 28 Types of Encryption for Each Type of Authentication
We a ke st
Stro ng e st
For example, if the wireless network has a RADIUS server, you can choose
log in to the wireless network, you can choose no encryption,
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 XMG and you do not have a RADIUS server.
Therefore, there is no authentication. Suppose the wireless network has two devices. Device A only
supports WEP, and device B supports WEP and WPA. Therefore, you should set up
wireless network.
Note: It is recommended that wireless networks use
The other types of encryption are better than none at all, but it is still possible for
unauthorized wireless devices to figure out the original information pretty quickly.
When you select
support WPA as well. In this case, if some of the devices support WPA and some support WPA2, you
should set up
c o m pa tib le
Many types of encryption use a key to protect the information in the wireless network. The longer the
key, the stronger the encryption. Every device in the wireless network must have the same key.
7.9.4 Sig na l Pro b le m s
Because wireless networks are radio networks, their signals are subject to limitations of distance,
interference and absorption.
Problems with distance occur when the two radios are too far apart. Problems with interference occur
when other radio waves interrupt the data signal. Interference may come from other radio
transmissions, such as military or air traffic control communications, or from machines that are
coincidental emitters such as electric motors or microwaves. Problems with absorption occur when
physical objects (such as thick walls) are between the two radios, muffling the signal.
Chapter 7 Wireless
NO AUT HENT IC AT IO N
No Security
Static WEP
WPA-PSK
WPA2-PSK
or
WPA2 WPA2- PSK
or (depending on the type of wireless network login) and select the
WPA2- PSK WPA2
option in the XMG.
XMG3512-B10A User's Guide
RADIUS SERVER
WPA
WPA2
WPA- PSK
in your XMG, you can also select an option (
101
Section 7.9.3.3 on
or
WPA WPA2
, , or
Sta tic WEP WPA- PSK WPA2- PSK
Sta tic WEP
, , or stronger encryption.
WPA
WPA c o m pa tib le
. If users do not
.
in the
) to
WPA