ZyXEL Communications Corporation VMG8924B10A Manual De Usuario

Appendix D Wireless LANs

VMG8924-B10A User’s Guide

Refer to this table to see what other security parameters you should configure for each 
authentication method or key management protocol type. MAC address filters are not dependent on 
how you configure these security features.

An antenna couples RF signals onto air. A transmitter within a wireless device sends an RF signal to 
the antenna, which propagates the signal through the air. The antenna also operates in reverse by 
capturing RF signals from the air. 

Positioning the antennas properly increases the range and coverage area of a wireless LAN. 

An antenna in the frequency of 2.4GHz (IEEE 802.11b and IEEE 802.11g) or 5GHz (IEEE 802.11a) 
is needed to communicate efficiently in a wireless LAN

A radiation pattern is a diagram that allows you to visualize the shape of the antenna’s coverage 
area. 

Antenna gain, measured in dB (decibel), is the increase in coverage within the RF beam width. 
Higher antenna gain improves the range of the signal for better communications. 

For an indoor site, each 1 dB increase in antenna gain results in a range increase of approximately 

Wireless Security Relational Matrix

Open

None

No

Disable

Enable without Dynamic WEP Key

Open

WEP

No          

Enable with Dynamic WEP Key

Yes

Enable without Dynamic WEP Key

Yes

Disable

Shared

WEP 

No          

Enable with Dynamic WEP Key

Yes

Enable without Dynamic WEP Key

Yes

Disable

WPA 

TKIP/AES

No

Enable

WPA-PSK 

TKIP/AES

Yes

Disable

WPA2

TKIP/AES

No

Enable

WPA2-PSK 

TKIP/AES

Yes

Disable