SFTP (Secure File Transfer Protocol) operates over port 22, using SSH (Secure Shell) encryption for secure file transfers.
Breakdown of Options:
A). 22 - Correct answer. SFTP runs over SSH (port 22) for secure file transfers.
B). 80 - Used for HTTP, not SFTP.
C). 443 - Used for HTTPS (secure web traffic).
D). 3389 - Used for RDP (Remote Desktop Protocol).
Reference:
CompTIA Network+ (N10-009) Official Study Guide - Domain 3.1: Compare and contrast network protocols.
RFC 4253: SSH Transport Layer Protocol

To access the internet using static IPs, the firewall (or router) must be configured correctly:
B). Default gateway: This is essential because it tells the firewall where to send outbound traffic destined for outside the local network.
D). One static IP address: The firewall must be assigned one of the static IPs to communicate over the public internet.
The other options are not essential for basic internet connectivity in this context:
A). NTP server: Useful for time synchronization but not required for internet access.
C). The modem's IP address: Irrelevant unless doing modem-level configuration.
E). DNS servers: Important for name resolution but not for basic layer 3 connectivity.
F). DHCP server: Not used when static IPs are assigned.
# Reference:
CompTIA Network+ N10-009 Official Objectives: 2.2 - Compare and contrast addressing technologies.

In a fiber patch panel, the SC (Subscriber Connector or Standard Connector) is commonly used because of its push-pull design and reliability in enterprise environments.
Breakdown of Options:
A). F-type - Used for coaxial cables (e.g., cable TV), not fiber.
B). RJ11 - Used for telephone lines, not fiber.
C). BNC - Used for coaxial connections, not fiber.
D). SC - # Correct answer. A standard fiber optic connector used in patch panels.
Reference:
CompTIA Network+ (N10-009) Official Study Guide - Domain 1.1: Compare and contrast physical network connectors.

Content filtering blocks access to restricted or malicious websites. When a user attempts to visit a site that violates company policies, they are redirected to a restriction page.
* This is a common security measure to prevent employees from accessing phishing or malware-infected sites.
* Content filters work by scanning URLs, keywords, or categories and blocking inappropriate or harmful content.
* Option A (DLP - Data Loss Prevention): Focuses on preventing sensitive data leaks rather than blocking web access.
* Option B (Captive portal): Used mainly in public Wi-Fi to authenticate users before granting access, not to restrict sites.
* Option D (DNS sinkholing): Redirects malicious domain requests to a safe address but is not responsible for policy-based restrictions on general content.
? Reference: CompTIA Network+ (N10-009) Official Study Guide - Section: Security Solutions

It is common for an access port to have both a voice VLAN and a data VLAN. A voice VLAN separates voice traffic from regular data traffic, ensuring better quality and security for voice communications.