Comprehensive and Detailed Explanation:
Acontent filterblocks access to specificwebsitesbased oncategory, URL, or keywords. This is the best solution torestrict gambling websites.
Breakdown of Options:
* A. ACLs- Controlnetwork access,not specific web content.
* B. Content filter-#Correct answer.Used toblock access to unwanted websites.
* C. Port security- Preventsunauthorized device connections,not web traffic filtering.
* D. Screened subnet- ADMZisolates public-facing servers,not user restrictions.

MFA (Multi-Factor Authentication) requires factors from different categories:
* Something you know # Password, PIN
* Something you have # Smart card, hardware (hard) token
* Something you are # Biometric
The correct second factor is a hard token.
* A. PIN = something you know (same factor as password).
* B. Favorite color = knowledge-based, same factor as password.
* D. Mother's maiden name = weak knowledge-based, same factor as password.
References (CompTIA Network+ N10-009):
* Domain: Network Security - Authentication methods, MFA categories.

Network access control authenticates users and devices before allowing them onto the network, ensuring only authorized entities gain access.

The server's subnet mask is 255.255.255.224 (/27), which covers IPs from 192.168.100.224 to 192.168.100.255. However, the router only recognizes 192.168.100.0/24, indicating a mismatch between the server's subnet and the router's network.
Correct mask for the /24 network is 255.255.255.0, allowing 256 IPs from 192.168.100.0 to 192.168.100.255.
This mismatch would result in routing issues, especially with the gateway outside of the subnet range.
Reference:
CompTIA Network+ N10-009 Official Objectives: 5.2 - Given a scenario, troubleshoot common wired connectivity issues.

SFTP (Secure File Transfer Protocol) operates over port 22, using SSH (Secure Shell) encryption for secure file transfers.