Dell PowerConnect W-IAP3WN, Руководство пользователя

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| Encryption
Dell PowerConnect W-Series Instant Access Point 6.1.3.4-3.1.0.0
| User Guide
Understanding WPA and WPA2
The Wi-Fi Alliance created the Wi-Fi Protected Access (WPA) and WPA2 certifications to describe the 802.11i
standard. The standard was written to replace WEP, which was found to have numerous security flaws. It was
taking longer than expected to complete the standard, so WPA was created based on a draft of 802.11i, which
allowed people to move forward quickly to create more secure WLANs. WPA2 encompasses the full
implementation of the 802.11i standard.
Table 19 summarizes the differences between the two certifications.
WPA2 is a superset that encompasses the full WPA feature set. WPA and WPA2 can be further classified as
follows:

Personal - Personal is also called as Pre-Shared Key (PSK). In this type, a unique key is shared with each client
in the network. Users have to use this key to securely login to the network. The key remains the same until it is
changed by authorized personnel. Key change intervals can also be configured.

Enterprise - Enterprise is more secure when compared to WPA Personal. In this type, every client
automatically receives a unique encryption key after securely logging on to the network. This key is long and
automatically updated regularly. While WPA uses TKIP, WPA2 uses AES algorithm.
Recommended Authentication and Encryption Combinations
Table 20 summarizes the recommendations for authentication and encryption combinations that should be used
in Wi-Fi networks.
Table 19
WPA and WPA2 Features
Certification Authentication Encryption
WPA  PSK
 IEEE 802.1X with Extensible Authentication
Protocol (EAP)
Temporal Key Integrity Protocol (TKIP) with
message integrity check (MIC)
WPA2

PSK

IEEE 802.1X with EAP
Advanced Encryption Standard -- Counter Mode
with Cipher Block Chaining Message
Authentication Code (AESCCMP)
Table 20
Recommended Authentication and Encryption Combinations
Network Type Authentication Encryption
Employee 802.1X AES
Guest Network Captive Portal None
Voice Network or Handheld devices 802.1X or PSK as supported by the device AES if possible, TKIP or WEP if necessary
(combine with restricted policy
enforcement firewall (PEF) user role).