WEP: 
This Is a basic encryption algorithm that is less secure than WPA. Use of WEP is 
discouraged due to security weaknesses, and one of the WPA modes should be 
used whenever possible. Only use WEP if you have clients that can only support 
WEP (usually older, 802.11b-only clients). 
Authentication Type 
Open or shared key 
Default Transmit Key 
Select the key form Key 1 - Key 4 key. 
Encryption 
There are two levels of WEP encryption, 64-bit (40-bit) and 128-bit. To utilize WEP, 
select the desired encryption bit, and enter a passphrase or up to four WEP key in 
hexadecimal format. If you are using 64-bit (40-bit), then each key must consist of 
exactly 10 hexadecimal characters or 5 ASCII characters. For 128-bit, each key 
must consist of exactly 26 hexadecimal characters. Valid hexadecimal characters 
are "0"-"9" and "A"-"F". 
ASCII/HEX: ASCII, the keys is 5 bit ASCII characters/13bit ASCII characters. 
     HEX, the keys is 10bit/26 bit hex digits. 
Passphrase:The letters and numbers used to generate a key.