User's Manual

7-8
Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide
OL-4211-05
Chapter 7 Viewing Status and Statistics
Viewing the Current Status of Your Client Adapter
Authentication Type Specifies whether the client adapter must share the same WEP keys as
the access point in order to authenticate or can authenticate to the
access point regardless of its WEP settings.
Value: Open or Shared
Note An incorrect WEP key setting prevents connectivity to the
network regardless of the 802.11 authentication type selected.
Note Refer to the “Setting Advanced Parameters” on page 5-6 for
information on setting the 802.11 authentication mode.
Message Integrity Check Indicates whether your client adapter is using message integrity check
(MIC) to protect packets sent to and received from the access point.
MIC prevents bit-flip attacks on encrypted packets. During a bit-flip
attack, an intruder intercepts an encrypted message, alters it slightly,
and retransmits it, and the receiver accepts the retransmitted message
as legitimate.
Note MIC is supported automatically by the client adapter’s driver,
but it must be enabled on the access point.
Value: None, MMH, or Michael
Message Integrity Check Description
None MIC is disabled.
MMH MIC is enabled and is being used with
CKIP.
Michael MIC is enabled and is being used with
WPA and TKIP.
QoS The type of quality of service that is currently being used by your client
adapter. QoS on wireless LANs (WLAN) provides prioritization of
traffic from the access point over the WLAN based on traffic
classification.
Value: None or WMM
QoS Description
None WMM standard QoS is not enabled.
WMM Wi-Fi Multimedia, a component of the
IEEE 802.11e WLAN standard for QoS, is
enabled. For this value to appear, QoS and
WMM must be enabled on the access point
to which the client adapter is associated.
Note WMM is supported automatically in the client adapter
software. However, you must enable the Windows QoS Packet
Scheduler to ensure WMM support. Follow the instructions in
the “Enabling Wi-Fi Multimedia” on page 5-59 to enable the
QoS Packet Scheduler.
Table 7-4 Advanced Client Adapter Status (continued)
Status Description