A content filter blocks access to specific websites based on category, URL, or keywords. This is the best solution to restrict gambling websites.
Breakdown of Options:
A). ACLs - Control network access, not specific web content.
B). Content filter - # Correct answer. Used to block access to unwanted websites.
C). Port security - Prevents unauthorized device connections, not web traffic filtering.
D). Screened subnet - A DMZ isolates public-facing servers, not user restrictions.
Reference:
CompTIA Network+ (N10-009) Official Study Guide - Domain 3.3: Given a scenario, implement network security measures.