Linksys WUSB11 User Manual
Page 14
5. The Advanced tab allows you to set the Fragmentation Threshold, the
RTS/CTS Threshold, and the Preamble Type. The Fragmentation Threshold
Value indicates how much of the network resources are devoted to recovering
packet errors. The value should remain at its default setting of 2,436. If you
experience high packet error rates, you can decrease this value, but it will like-
ly decrease overall network performance. Only minor modifications of this
value are recommended.
The RTS Threshold Value should remain at its default setting of 2,437. A pre-
amble is a signal used to synchronize the transmission timing between two or
more systems. A series of transmission pulses is sent before the data to indi-
cate that "someone is about to transmit data". This ensures that systems receiv-
ing the information correctly interpret when the data transmission starts.
Security is used for WEP only. By selecting Deny Unencrypted Data
Frames, all unencrypted data will not be seen. For Authentication Type, you
may choose between Open System or Shared Key.
Shared Key is when both the sender and recipient share a secret key.
Both units use this key for an extended length of time, sometimes
indefinitely. Any eavesdropper that discovers the key may decipher all
packets until the key is changed.
Open System, the default setting, is when the sender and the recipi
ent do not share a secret key. Each party generates its own key-pair
and asks the receiver to accept the (usually randomly) generated key.
Once accepted, this key is used for a short time only, then a new key
is generated and agreed upon. Even if the secret key is discovered,
only a small amount of data may be decrypted.
The Preamble Mode should be set to Long (if in a “noisy” network environ-
ment), Short (if the environment is clear), or click OK to complete the con-
figuration.
6. The About tab shows you copyright and version information about the driv-
er, the configuration utility, and the firmware. The version number of the driv-
er may vary from this screen, depending on which version was shipped with
your Adapter. You can always visit www.linksys.com for the latest version of
the driver. Click OK to complete the configuration.
23
Wireless USB Network Adapter
22
Instant Wireless
TM
Series
Note:
In most
cases, you will not
need to change
these settings.