Cisco Systems CB21AG manual None MIC is disabled, Mmh, MIC is enabled and is being used with, Ckip

Chapter 7 Viewing Status and Statistics

Viewing the Current Status of Your Client Adapter

Table 7-4	Advanced Client Adapter Status (continued)
Status		Description
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” section on
		page 5-6for 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.

Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide

7-8 OL-4211-03