单选题You review the failed attempts logs on an aaa server and find： "unknown network access server error." Which failure could produce this error？（）A failure of the wireless client and aaa server handshakeB supplicant authentication failureC aaa client and 

第1题：

You have an Exchange organization.All servers in the organization have Exchange Server 2010 Service Pack l （SP1） installed.An external user reports that when he sends e-mail messages to the organization， they are not received.You suspect that the e-mail messages he sends are incorrectly identified as spam.You need to identify which anti-spam filter is blocking the e-mail messages. What should you do？（）

• A、Modify the protocol logging level， and then review the protocol logs.
• B、Modify the connectivity log settings， and then review the connectivity logs.
• C、Modify the message tracking settings， and then review the message tracking logs.
• D、Enable pipeline tracing， and then review the trace.

第2题：

You review the failed attempts logs on an aaa server and find： "unknown network access server error." Which failure could produce this error？（）

• A、failure of the wireless client and aaa server handshake
• B、supplicant authentication failure
• C、aaa client and aaa server handshake
• D、wrong password used by the supplicant

第3题：

You review the Failed Attempts logs on an AAA server and find： "unknown network access servererror." Which failure could produce this error？（）

• A、AAA client and AAA server handshake failure
• B、supplicant authentication failure
• C、wrong password used by the supplicant
• D、failure of the wireless client and AAA server handshake

第4题：

In a deployment using standalone access points， clients set up to authenticate with EAP-PEAP orEAP-Cisco Wireless （Cisco-LEAP） cannot authenticate. When you inspect the Failed Attempts reporton the Cisco Secure ACS， you find this error： "Unknown network access server NAS."  Which problem may have caused this failure？（）

• A、misconfigured IP address of the AAA server on the access point
• B、misconfigured EAP type on the access point
• C、misconfigured IP address of the access point on the AAA server
• D、misconfigured EAP type on the AAA server

第5题：

In a deployment using the lightweight access points， clients set up to authenticate with eap-peap or eap-cisco wireless （leap） cannot authenticatE.  upon inspection of the failed attempts report you see the following error： "unknown network access server nas." What two problems can cause this type of failure？（）

• A、misconfigured ip address of the aaa server on the wireless controller
• B、misconfigured ip address of the wireless lan controller on the aaa server
• C、misconfigured eap type on the wireless lan controller
• D、misconfigured shared secret on the wireless lan controller
• E、misconfigured eap type on the aaa server

第6题：

You review the failed attempts logs on an aaa server and find： "unknown network access server error."  Which failure could produce this error？（）

• A、aaa client and aaa server handshake failure
• B、supplicant authentication failure
• C、wrong password used by the supplicant
• D、failure of the wireless client and aaa server handshake

第7题：

In a deployment using the lightweight access points， clients set up to authenticate with EAP-PEAPor EAP-Cisco Wireless （LEAP） cannot authenticate. Upon inspection of the Failed Attempts reportyou see the following error： "Unknown network access server NAS."  What two problems can causethis type of failure？（）

• A、misconfigured IP address of the AAA server on the wireless controller
• B、misconfigured IP address of the wireless LAN controller on the AAA server
• C、misconfigured EAP type on the wireless LAN controller
• D、misconfigured shared secret on the wireless LAN controller
• E、misconfigured EAP type on the AAA server

第8题：

You review the Failed Attempts logs on an AAA server and find： "unknown network access servererror."  Which failure could produce this error？（）

• A、failure of the wireless client and AAA server handshake
• B、supplicant authentication failure
• C、AAA client and AAA server handshake
• D、Wrong password used by the supplicant

第9题：

You review the Failed Attempts logs on an AAA server and find： "unknown network access server error." Which failure could produce this error？（）

• A、failure of the wireless client and AAA server handshake
• B、supplicant authentication failureB.AAA client and AAA server handshake failure
• C、wrong password used by the supplicant

第10题：

While reviewing the backup logs a server administrator notices that a backup job for an application server on the same subnet has failed. Which of the following is MOST likely the problem？（）

• A、The remote agent was not running.
• B、The management card has failed.
• C、The proxy server was blocking access.
• D、The hardware firewall was blocking access.