Which statement best describes the effect of the rewrite action that uses NetScaler system time on the Date header?

• A. Replaces the Date header with the NetScaler system time in a conventional date format.
• B. Replaces the NetScaler system time with a GMT value in Date header.
• C. Leaves the Date header unchanged.
• D. Removes the Date header entirely.

Answer: (A)

This tests how a rewrite action can override the HTTP Date header with the appliance’s current time in the standard HTTP-date format. When the action uses NetScaler system time, it replaces the existing Date header with the current time formatted as a conventional HTTP-date (the RFC 1123 style, for example: Tue, 28 Mar 2023 14:45:00 GMT). This makes the header a correctly formatted timestamp that clients and caches expect, rather than a raw or missing value.

It’s not simply a numeric GMT value; it’s the full, human-readable date string in the recognized HTTP format. It isn’t left unchanged, nor removed, because the rewrite explicitly assigns a new value based on the system clock in the proper format.