ZyXEL Communications Corporation VMG8924B10A Manual De Usuario

 Appendix D Wireless LANs

VMG8924-B10A User’s Guide

If the Fragmentation Threshold value is smaller than the RTS/CTS 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 size.

IEEE 802.11g is fully compatible with the IEEE 802.11b standard. This means an IEEE 802.11b 
adapter can interface directly with an IEEE 802.11g access point (and vice versa) at 11 Mbps or 
lower depending on range. IEEE 802.11g has several intermediate rate steps between the 
maximum and minimum data rates. The IEEE 802.11g data rate and modulation are as follows:

Wireless security is vital to your network to protect wireless communication between wireless 
clients, access points and the wired network.

Wireless security methods available on the Device are data encryption, wireless client 
authentication, restricting access by device MAC address and hiding the Device identity.

The following figure shows the relative effectiveness of these wireless security methods available on 
your Device.

Note: You must enable the same wireless security settings on the Device and on all 

wireless clients that you want to associate with it. 

IEEE 802.11g

1

DBPSK (Differential Binary Phase Shift Keyed)

2

DQPSK (Differential Quadrature Phase Shift Keying)

5.5 / 11

CCK (Complementary Code Keying) 

6/9/12/18/24/36/48/
54

OFDM (Orthogonal Frequency Division Multiplexing) 

Wireless Security Levels

Least       
Secure                                                                                  

Most Secure

Unique SSID (Default)

Unique SSID with Hide SSID Enabled

MAC Address Filtering

WEP Encryption

IEEE802.1x EAP with RADIUS Server Authentication

Wi-Fi Protected Access (WPA)

WPA2