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System Configuration
6-74
6
A summary of wireless security considerations is listed in the following table.
Note: You must enable data encryption through the web or CLI in order to enable all
types of encryption (WEP, TKIP, or AES) in the access point.
Table 6-2. Wireless Security Considerations
Security
Mechanism
Client Support Implementation Considerations
WEP Built-in support on all 802.11a
and 802.11g devices
Provides only weak security
Requires manual key management
WEP over 802.1X Requires 802.1X client support
in system or by add-in software
(support provided in Windows
2000 SP3 or later and Windows
XP)
Provides dynamic key rotation for improved WEP
security
Requires configured RADIUS server
802.1X EAP type may require management of
digital certificates for clients and server
MAC Address
Filtering
Uses the MAC address of client
network card
Provides only weak user authentication
Management of authorized MAC addresses
Can be combined with other methods for improved
security
Optionally configured RADIUS server
WPA over 802.1X
Mode
Requires WPA-enabled system
and network card driver
(native support provided in
Windows XP)
Provides robust security in WPA-only mode
(i.e., WPA clients only)
Offers support for legacy WEP clients, but with
increased security risk (i.e., WEP authentication
keys disabled)
Requires configured RADIUS server
802.1X EAP type may require management of
digital certificates for clients and server
WPA PSK Mode Requires WPA-enabled system
and network card driver
(native support provided in
Windows XP)
Provides good security in small networks
Requires manual management of pre-shared key
WPA2 with 802.1X Requires WPA-enabled system
and network card driver (native
support provided in Windows
XP)
Provides the strongest security in WPA2-only
mode
Provides robust security in mixed mode for WPA
and WPA2 clients
Offers fast roaming for time-sensitive client
applications
Requires configured RADIUS server
802.1X EAP type may require management of
digital certificates for clients and server
Clients may require hardware upgrade to be WPA2
compliant
WPA2 PSK Mode Requires WPA-enabled system
and network card driver (native
support provided in Windows
XP)
Provides robust security in small networks
Requires manual management of pre-shared key
Clients may require hardware upgrade to be WPA2
compliant
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