The rewrite action 'add rewrite action sync_date replace http.res.date sys.time' updates which header in the HTTP response?

• A. The rewrite action replaces the Date header in the http response with the GMT time stamp.
• B. The rewrite action replaces the Date header in the http response with the NetScaler system time in a conventional date format.
• C. The rewrite action is invalid, as system time CANNOT be referenced in the system policy.
• D. The rewrite action replaces the NetScaler system time with the Date header in a conventional date format.

Answer: (B)

This tests how a rewrite action can set a response header using a system time value. The action specifies the response Date header (http.res.date) and uses the NetScaler's current system time (sys.time) as the new value, with the header formatted in the standard HTTP date format. In other words, the response’s Date header is replaced by the NetScaler system time expressed as a conventional date string (RFC 1123 style). The Date header is not being moved to another header, nor is the system time being replaced by anything else.