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F5 Networks 301b Exam - Topic 3 Question 130 Discussion

Which iRule will instruct the client's browser to avoid caching HTML server responses?
C) when HTTP_RESPONSE { if {[HTTP::header Content-Type] contains 'html'} { HTTP::header insert Pragma 'no-cache' HTTP::header insert Expires 'Fri, 01 Jan 1990 00:00:00 GMT' HTTP::header replace Cache-Control 'no-cache,no-store,must-revalidate' } }
A) when HTTP_REQUEST { if {[HTTP::header Content-Type] equals 'html'} { HTTP::header insert Pragma 'no-cache' HTTP::header insert Expires 'Fri, 01 Jan 1990 00:00:00 GMT' HTTP::header replace Cache-Control 'no-cache,no-store,must-revalidate' } }
B) when HTTP_REQUEST { if {[HTTP::header Content-Type] contains 'html'} { HTTP::header insert Pragma 'no-cache' HTTP::header insert Expires 'Fri, 01 Jan 1990 00:00:00 GMT' HTTP::header replace Cache-Control 'no-cache,no-store,must-revalidate' } }
D) when HTTP_RESPONSE { if {[HTTP::header Content-Type] equals 'html'} { HTTP::header insert Pragma 'no-cache' HTTP::header insert Expires 'Fri, 01 Jan 1990 00:00:00 GMT' HTTP::header replace Cache-Control 'no-cache,no-store,must-revalidate' } }

F5 Networks 301b Exam - Topic 3 Question 130 Discussion

Actual exam question for F5 Networks's 301b exam
Question #: 130
Topic #: 3
[All 301b Questions]

Which iRule will instruct the client's browser to avoid caching HTML server responses?

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Suggested Answer: C

by Lashandra at Jul 16, 2026, 02:14 PM

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Sabra
4 days ago
I didn’t know you could set Expires like that!
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Adolph
9 days ago
I agree with A, it’s the standard way to handle caching.
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Chandra
14 days ago
Wait, why are we using "equals" in A? Seems off.
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Eva
20 days ago
I think B is better since it uses "contains."
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Adela
25 days ago
Option A is the correct one!
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Willis
30 days ago
I’m confused about the difference between "equals" and "contains" in this context. I thought both could work, but I guess it depends on the exact match needed.
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Venita
1 month ago
I practiced a similar question, and I feel like the caching headers should be set in the HTTP_RESPONSE phase, which makes me lean towards option C or D.
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Kiley
1 month ago
I'm not entirely sure, but I remember something about using "contains" instead of "equals" could be more flexible. Maybe option B?
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Darell
2 months ago
I think it might be option A because it checks the Content-Type during the HTTP_REQUEST phase, which seems right for caching control.
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