A company has recently launched a new billing invoice website for a few key vendors. The cybersecurity analyst is receiving calls that the website is performing slowly and the pages sometimes time out. The analyst notices the website is receiving millions of requests, causing the service to become unavailable. Which of the following can be implemented to maintain the availability of the website?

A.
VPN
B.
Honeypot
C.
Whitelisting
D.
DMZ
E.
MAC filtering
Explanation:
Maybe could someone explain, why whitelisting here is better answer than VPN?
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new billing invoice website for a few key vendors
you dont need a vpn when you can just whitelist five IPs.
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