Scenario: A Citrix Engineer is configuring a Buffer Overflow Security Check. When configuring the options, the engineer notices that the Learn Mode is unavailable. Why is the Learn Mode unavailable in this configuration?

• A.The Application Firewall database is at 20 MB.
• B.The Application Firewall feature is disabled.
• C.TheNetScaler License is at Enterprise.
• D.The Learn Mode is NOT available for Buffer Overflow.

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Which security model should a Citrix Engineer implement to ensure that only appropriate traffic that matches the expected application behavior is permitted to pass through to the web application?

• A.Negative
• B.Dynamic
• C.Positive
• D.Hybrid

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Scenario: A Citrix Engineer implements Application-level Quality of Experience (AppQoE) to protect a web application. Shortly after that, users call to complain that nearly every request is being met with a Captcha.
What can the engineer do to improve the user experience?

• A.Disable the Captcha.
• B.Increase the Policy Queue Depth.
• C.Increase the Session Life.
• D.Increase the DOS Attack Threshold.

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Which variable will display the client's source IP address when added to an HTML Error Object page?

• A.$<CUENTIP.SRC>
• B.$[CLIENT.IP.SRC]
• C.${CUENT.IPSRC}
• D.$(CLIENT.1P.SRC)

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A Citrix Engineer is configuring an Application Firewall Policy to protect a website.
Which expression will the engineer use in the policy?

• A.HTTP.RES.HEADER ("hostname").EQ ("true")
• B.HTTP.REQ.IS_VALID
• C.HTTP.REQ.HOSTNAME.EQ ("true")
• D.HTTP.RES.IS_VALID

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