What's the difference between WEP, WPA-Personal, WPA2-Personal, WPA-Enterprise, WPA2-Enterprise, and RADIUS ?

What's the difference between WEP, WPA-Personal, WPA2-Personal, WPA-Enterprise, WPA2-Enterprise, and RADIUS and why should each secutiy be used over others?


WEP.
This security mode is defined in the original IEEE 802.11 standard. This mode is no longer recommended because of its weak security protection. Users are urged to migrate to WPA2.
Encryption : Select a level of WEP encryption, 40 / 64 bits (10 hex digits) or 104 / 128 bits (26 hex digits).
Passphrase : If you want to generate WEP keys using a Passphrase, then enter the Passphrase in the field provided and click the Generate key.
Key 1-4 If you want to manually enter WEP keys, then complete the fields provided. Each WEP key can consist of the letters "A" through "F" and the numbers "0" through "9". It should be 10 characters in length for 40/64-bit encryption or 26 characters in length for 104/128-bit encryption.

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WPA-Personal.
WPA2-Personal is recommended.
Encryption :

The default is TKIP or AES.

Pre-Shared Key :
Enter a key of 8-63 characters.

Key Renewal :
Enter a Key Renewal period, which instructs the device how often it should change encryption keys. The default is 3600 seconds.

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WPA2-Personal.
Encryption :
The default is TKIP or AES.

Pre-Shared Key
Enter a key of 8-63 characters.

Key Renewal
Enter a Key Renewal period, which instructs the device how often it should change encryption keys. The default is 3600 seconds.

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WPA-Enterprise.
This WPA used in coordination with a RADIUS server for client authentication. (This should only be used when a RADIUS server is connected to the device.) Note: WPA2-Enterprise is recommended.

Encryption
The default is TKIP or AES.

RADIUS Server
Enter the RADIUS server's IP address.

RADIUS Port
Enter the port number used by the RADIUS server. The default is 1812.

Shared Key
Enter the key used by the device and RADIUS server.

Key Renewal
Enter a Key Renewal period, which instructs the device how often it should change encryption keys. The default is 3600 seconds.

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WPA2-Enterprise.
This WPA2 used in coordination with a RADIUS server for client authentication. (This should only be used when a RADIUS server is connected to the device.)

Encryption
The default is TKIP or AES.

RADIUS Server
Enter the RADIUS server's IP address.

RADIUS Port
Enter the port number used by the RADIUS server. The default is 1812.

Shared Key
Enter the key used by the device and RADIUS server.

Key Renewal
Enter a Key Renewal period, which instructs the device how often it should change encryption keys. The default is 3600 seconds.

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RADIUS
WPA2-Enterprise is recommended.

RADIUS Server
Enter the RADIUS server's IP address.

RADIUS Port
Enter the port number used by the RADIUS server. The default is 1812.

Shared Key
Enter the key used by the device and RADIUS server