ZyXEL Communications G-360 - Manual (Page 28)

ZyXEL G-360 User’s Guide
2-8 Wireless LAN Network
Step 3. The RADIUS server distributes a Pairwise Master Key (PMK) key to the AP that then sets up a
key hierarchy and management system, using the pair-wise key to dynamically generate unique
data encryption keys to encrypt every data packet that is wirelessly communicated between the
AP and the wireless clients.
Figure 2-7 WPA with RADIUS Application Example
2.3 Fragmentation Threshold
A Fragmentation Threshold is the maximum data fragment size (between 256 and 2432 bytes) that can be
sent in the wireless network before the ZyXEL G-360 will fragment the packet into smaller data frames.
A large Fragmentation Threshold is recommended for networks not prone to interference while you
should set a smaller threshold for busy networks or networks that are prone to interference.
If the Fragmentation Threshold value is smaller than the RTS/CTS Threshold value (see previously)
you set then the RTS (Request To Send)/CTS (Clear to Send) handshake will never occur as data frames
will be fragmented before they reach RTS/CTS Threshold size.
2.4 RTS/CTS Threshold
A hidden node occurs when two stations are within range of the same access point, but are not within range
of each other. The following figure illustrates a hidden node. Both stations are within range of the access