Appendix D Wireless LANs
VMG1312-B Series User’s Guide
348
Security Parameters Summary
Refer to this t able to see what other secur ity param eters you should configure for each
aut hent icat ion met hod or key m anagem ent prot ocol type. MAC address filt ers are not dependent on
how you configure t hese securit y features.
Antenna Overview
An antenna couples RF signals onto air. A t ransm it t er within a wireless device sends an RF signal t o
the antenna, which propagates t he signal through t he air. The antenna also operates in reverse by
capturing RF signals from t he air.
Positioning t he ant ennas properly increases t he range and coverage area of a wireless LAN.
Antenna Characteristics
Frequency
An antenna in t he frequency of 2.4GHz ( I EEE 802.11b and I EEE 802.11g) or 5GHz ( I EEE 802.11a)
is needed t o com m unicate efficient ly in a wir eless LAN
Radiation Pattern
A radiation patt ern is a diagram t hat allows you t o visualize t he shape of t he antenna’s coverage
area.
Antenna Gain
Antenna gain, m easured in dB ( decibel) , is t he increase in coverage wit hin the RF beam widt h.
Higher ant enna gain im proves t he range of the signal for better com m unications.
For an indoor site, each 1 dB increase in ant enna gain results in a range increase of approxim ately
Table 125 Wireless Securit y Relational Matrix
AUTHENTICATION
METHOD/ KEY
MANAGEMENT PROTOCOL
ENCRYPTIO
N METHOD
ENTER
MANUAL KEY
IEEE 802.1X
Open None No Disable
Enable wit hout Dy nam ic WEP Key
Open WEP No Enable with Dynam ic WEP Key
Ye s Enable wit hout Dy nam ic WEP Key
Ye s Disable
Shared WEP No Enable with Dynam ic WEP Key
Ye s Enable wit hout Dy nam ic WEP Key
Ye s Disable
WPA TKI P/ AES No Enable
WPA-PSK TKI P/ AES Yes Disable
WPA2 TKI P/ AES No Enable
WPA2-PSK TKI P/ AES Ye s Disable
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