N10-009 Exam Dumps - CompTIA Network+ Certification Exam

Dual stack is the most appropriate technology because it allows a device, network, or service to support IPv4 and IPv6 at the same time. In a dual-stack environment, systems can communicate with IPv4-only clients, IPv6-only clients, and clients that support both protocol versions. This is especially important for a CDN provider because customers may connect from many different networks, and not all networks have fully migrated to IPv6.

The CompTIA Network+ N10-009 objectives include IPv4 and IPv6 addressing concepts, network services, and interoperability methods. Dual stack is a common transition strategy because it does not require immediate removal of IPv4. Instead, both protocol stacks operate together while networks gradually adopt IPv6.

Quality of service is used to prioritize traffic, not to provide IPv4 and IPv6 interoperability. Automatic Private IP Addressing assigns a 169.254.x.x address when DHCP fails and applies to IPv4 link-local addressing. Stateless Address Autoconfiguration allows IPv6 hosts to create their own IPv6 addresses, but it does not provide IPv4 and IPv6 coexistence by itself. Therefore, dual stack is the correct answer.

If the company’s SSID is not visible in some areas while other networks are still visible, the most likely cause is insufficient wireless coverage. The wireless signal does not reach those areas, meaning additional access points or signal boosters may be required.

Breakdown of Options:

A. Interference or channel overlap – Would cause slow or unstable connections, but the SSID should still be visible.

B. Insufficient wireless coverage – ✅ Correct answer. If the SSID is not appearing, the signal is too weak in that area.

C. Roaming misconfiguration – Would cause devices to stay on weaker APs instead of switching, but the SSID should still be visible.

D. Client disassociation issues – This would disconnect users, but they should still see the network.

Using Pre-Shared Key (PSK) authentication means that all users share the same Wi-Fi password, making it difficult to identify individual users when security incidents occur.

Migrating to WPA2-Enterprise (or WPA3-Enterprise) replaces PSK authentication with individual user credentials using 802.1X authentication and a RADIUS server. This allows the organization to:

Track and log specific user activity

Enforce per-user authentication policies

Improve network security

Breakdown of Options:

A. Restrict users to the 5GHz frequency – Improves performance but does not enhance user tracking or security.

B. Upgrade to a mesh network – A mesh network improves coverage, not security tracking.

C. Migrate from PSK to Enterprise – ✅ Correct answer. WPA2-Enterprise or WPA3-Enterprise uses individual user authentication, allowing per-user tracking.

D. Implement WPA2 encryption – WPA2 is already widely used; it does not resolve the tracking issue.

The correct answer is D. Use a cable tester. Even though the technician sees that the cable is terminated, the note about the incorrect color code suggests there may be a wiring issue such as crossed pairs, reversed pairs, split pairs, or another pinout problem. The proper next troubleshooting step is to test the cable rather than assume immediately that it must be replaced.

A cable tester helps verify continuity, pin mapping, and whether the conductors are in the correct order. That gives the technician evidence about whether the cable is actually faulty and what type of fault may exist. In troubleshooting, testing first is the best practice because it confirms the problem before taking corrective action.

The other choices are less appropriate as the next step. Implementing fiber is unnecessary and unrelated to the current copper issue. Replacing the Ethernet cable may eventually be needed, but it skips the diagnostic step the question is asking for. Changing the switchport speed does not address incorrect pair termination.

Network+ often emphasizes using the correct diagnostic tool before replacing hardware. Since the issue centers on cable termination and color sequence, the technician should use a cable tester to validate the wiring and identify the fault accurately.

Since the switch supports only 10Gbps per port, achieving 40Gbps throughput requires link aggregation (LACP), which combines multiple 10Gbps links into one logical interface for higher bandwidth.

Breakdown of Options:

A. 802.1Q tagging – VLAN tagging helps segment traffic but does not increase throughput.

B. Jumbo frames – Jumbo frames reduce overhead but do not increase bandwidth.

C. Half duplex – Half duplex restricts communication, reducing performance instead of improving it.

D. Link aggregation – Correct answer. LACP combines multiple 10Gbps links to provide a 40Gbps connection.

A rogue DHCP server occurs when an unauthorized or misconfigured DHCP server assigns incorrect IP addresses, default gateways, or DNS settings to clients.

•In this scenario:

•The user can ping the gateway, meaning local network communication is working.

•However, they cannot access network resources, which suggests incorrect IP configuration (likely due to a rogue DHCP server assigning the wrong gateway or DNS).

•Why not the other options?

•VLAN hopping (A): This is an attack that exploits VLAN configurations to gain access to unauthorized VLANs. It would not typically cause multiple users to lose network access.

•Distributed DoS (C): A DDoS attack floods a network or service with traffic, but this issue is more likely misconfigured IP settings than an actual attack.

•Evil twin (D): This refers to a fraudulent Wi-Fi network mimicking a legitimate one. Since the users are on a wired network (ipconfig output checked), this is not applicable.

The correct answer is Full-tunnel because the policy requires all network traffic from remote corporate laptops to pass through the company’s VPN. In a full-tunnel VPN configuration, once the VPN connection is established, all traffic—including internet-bound traffic—is routed through the corporate network before reaching its destination. This ensures centralized monitoring, content filtering, logging, and enforcement of security controls such as IDS/IPS and firewalls.

According to CompTIA Network+ (N10-009) security objectives, full-tunnel VPNs enhance security by preventing users from directly accessing the internet from their local connection, thereby reducing exposure to local network threats (e.g., public Wi-Fi attacks).

A split-tunnel VPN (Option D) allows users to access the internet directly while only sending corporate-bound traffic through the VPN, which does not meet the “all traffic” requirement. A site-to-site tunnel (Option C) connects entire networks rather than individual remote users. A clientless VPN (Option A) typically provides web-based access without a full network tunnel and does not necessarily route all traffic.

Therefore, full-tunnel best matches the policy requirement.

Single-mode fiber is best suited for long-distance communication, often exceeding 10 km (6.2 miles). It ' s immune to EMI and offers high bandwidth — making it the ideal choice for connecting buildings across a city.

Coaxial (A) and Twinaxial (B) are used for shorter distances and specific use cases (e.g., storage or legacy systems).

Cat 5 (D) is limited to 100 meters and is not suitable for city-level interconnects.

✅ For long-distance, high-speed, and reliable communication between buildings, Single-mode fiber is the professional choice.