A Citrix Administrator needs to configure a rate-limiting policy setting DNS requests to a threshold of 1,000 per second. Which command does the administrator need to run to correctly configure this…

Question

Options

• ASYS.CHECK.LIMIT(<limit_identifier>)
• BSYS.CHECK.LIMIT(<limit_identifier>) || HTTP.REQ.LIMIT(<limit_identifier>)
• CHTTP.REQ.LIMIT(<limit_identifier>)
• DSYS.CHECK.LIMIT(<limit_identifier>) || CONNECTION.IP.LIMIT(<limit_identifier>)

• A
  78% (25)
• B
  3% (1)
• C
  6% (2)
• D
  13% (4)

Explanation

SYS.CHECK.LIMIT(<limit_identifier>) is correct because DNS operates at the network/system level, not the HTTP application layer - making SYS.CHECK.LIMIT the appropriate Citrix ADC policy expression to enforce a rate threshold against DNS traffic using a pre-configured limit identifier. Option C (HTTP.REQ.LIMIT) is wrong because it applies only to HTTP requests, and DNS is not an HTTP protocol. Options B and D are wrong because they combine expressions with a logical OR (||), which would bypass the limit if either condition evaluates to true - defeating the purpose of rate limiting - and CONNECTION.IP.LIMIT in option D is not a valid Citrix ADC policy expression. Memory tip: Associate SYS with system-level protocols like DNS and TCP, and HTTP.REQ strictly with web traffic - if the protocol isn't HTTP, reach for SYS.CHECK.LIMIT.

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