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.

See the solution configuration below in Explanation.
Explanation:
A screenshot of a computer AI-generated content may be incorrect.

A screenshot of a computer AI-generated content may be incorrect.
A screenshot of a computer AI-generated content may be incorrect.

Link aggregation (also known as port trunking or EtherChannel) combines multiple network connections in parallel to increase throughput and provide redundancy. When two switches are connected with multiple links without any additional configuration, a Layer 2 loop may occur. Link aggregation prevents these loops by treating the multiple connections as a single logical link, using a protocol such as LACP (Link Aggregation Control Protocol).
From Andrew Ramdayal's guide:
"Link aggregation allows you to combine multiple network connections to increase the bandwidth and provide redundancy. It helps prevent Layer 2 loops when connecting switches with multiple links by making them operate as a single logical interface."

A jump box is a hardened system that provides secure access to isolated or sensitive devices on a separate network.
Breakdown of Options:
A). Jump box - # Correct answer. Acts as a middle point for secure remote access.
B). API gateway - Used for managing API calls, not remote access to isolated devices.
C). Secure Shell (SSH) - Requires direct connectivity, which may not be available for an isolated device.
D). Clientless VPN - Allows web-based VPN access, but does not guarantee access to isolated devices.
Reference:
CompTIA Network+ (N10-009) Official Study Guide - Domain 3.4: Implement secure remote access methods.

When a host fails to obtain an IP address from a DHCP server, it assigns itself an APIPA (Automatic Private IP Addressing) address in the 169.254.x.x range, commonly described as a "self-assigned IP." This prevents communication outside the local link, including reaching the default gateway.
B). RFC1918 addresses are private ranges (10.x.x.x, 172.16-31.x.x, 192.168.x.x), but these are not self- assigned.
C). If the TCP/IP stack were disabled, the host wouldn't have any IP at all.
D). If a static IP were assigned, it would show a configured value, not self-assigned.
References (CompTIA Network+ N10-009):
Domain: Network Troubleshooting - IP addressing issues, DHCP failures, APIPA behavior.