CompTIA N10-009 CompTIA Network+ Certification Exam Practice Test

Answer : A

Band steering is a feature in wireless networks that encourages dual-band capable devices to connect to the 5GHz band instead of the 2.4GHz band.

Why Band Steering?

The 5GHz band supports higher speeds and less interference compared to 2.4GHz.

If a device supports both bands, the access point (AP) can 'steer' it to connect to 5GHz instead of 2.4GHz.

This helps ensure users always connect to the fastest available network.

Incorrect Options:

B . Disabling the 5GHz SSID: Would force devices onto 2.4GHz, which is slower and more congested.

C . Adding a Captive Portal: Used for guest authentication, not for speed optimization.

D . Configuring MAC Filtering: Used for security, not for optimizing network speed.

CompTIA Network+ N10-009 Official Study Guide -- Chapter on Wireless Technologies and Optimization

Answer : B

Power over Ethernet (PoE) allows devices such as cameras, access points, and VoIP phones to receive both power and data over the same Ethernet cable. If only eight out of twelve cameras turn on, the most likely issue is that the PoE switch has exceeded its power budget (total wattage capacity).

PoE Budget Limitation: PoE switches have a maximum power output, which can limit the number of devices they support simultaneously.

Voltage Check: Different PoE standards exist:

802.3af (PoE): Supplies up to 15.4W per port

802.3at (PoE+): Supplies up to 30W per port

802.3bt (PoE++): Supplies up to 60-100W per port

Power Draw Calculation: If each camera requires 15W and the switch can only provide 120W, then only 8 cameras (8 15W = 120W) will turn on.

Incorrect Options:

A . Ethernet Cable Type: Most PoE devices work with Cat5e and above. Cable type could be an issue, but power limitation is the more immediate concern.

C . Transceiver Compatibility: Only relevant if fiber transceivers or modules are in use, but not likely the root cause for power-related issues.

D . DHCP Addressing: DHCP issues affect network connectivity, not power delivery.

CompTIA Network+ N10-009 Official Study Guide -- Chapter on Power over Ethernet (PoE)

Answer : A

Network Address Translation (NAT) is a process that allows a device, typically a firewall or router, to map private IP addresses to public IP addresses. This enables internal network devices to communicate over the internet using a single or a limited number of public IP addresses.

Static NAT (One-to-One Mapping): Maps a single private IP address to a single public IP address, commonly used for servers that need to be accessible from the internet.

Dynamic NAT (Many-to-Many Mapping): Dynamically assigns a public IP from a pool to internal devices.

PAT (Port Address Translation): A type of NAT where multiple private IPs share a single public IP using different port numbers.

Incorrect Options:

B . VIP (Virtual IP Address): Used in load balancing and high-availability configurations, not for NAT.

C . PAT (Port Address Translation): A specific form of NAT, but the question refers to general NAT, making option A the best choice.

D . BGP (Border Gateway Protocol): A routing protocol used to exchange information between different networks, not related to NAT.

CompTIA Network+ N10-009 Official Study Guide -- Chapter on Network Address Translation (NAT)

Answer : A

Quality of Service (QoS) ensures video conferencing receives priority bandwidth to prevent latency, jitter, and packet loss.

QoS settings prioritize real-time traffic, ensuring smooth performance.

? Reference: CompTIA Network+ (N10-009) Official Study Guide -- Section: Network Performance Optimization

Answer : D

A Change Advisory Board (CAB) reviews and approves network changes. Before approval, they need a detailed action plan outlining the change, potential impacts, and mitigation strategies.

A Plan of Action includes risk assessments, rollback procedures, and deployment steps, which are critical for decision-making.

? Reference: CompTIA Network+ (N10-009) Official Study Guide -- Section: Network Troubleshooting Methodologies

Answer : A

An IP Helper (IP Helper Address) allows DHCP requests to pass through routers and reach a DHCP server on another network.

DHCP broadcasts are not forwarded across routers by default, so an IP Helper Address is needed to relay the request.

This is crucial for large networks where a single DHCP server serves multiple subnets.

Option B (Reservation): Ensures a specific IP address is assigned to a MAC address but does not relay DHCP across networks.

Option C (Exclusion): Prevents specific IP addresses from being assigned, but does not help with DHCP relay.

Option D (Scope): Defines the range of IP addresses available for DHCP clients but does not assist in cross-network communication.

? Reference: CompTIA Network+ (N10-009) Official Study Guide -- Section: DHCP and IP Addressing

Answer : A

A Virtual Private Network (VPN) creates an encrypted connection between a remote user and an internal network, ensuring secure access to internal applications.

VPNs use encryption protocols like IPSec and SSL/TLS to protect data during transmission.

They are widely used for secure remote work, accessing company resources, and bypassing geographic restrictions.

Option B (CDN - Content Delivery Network): Used for speeding up website content delivery, not for remote access security.

Option C (SAN - Storage Area Network): Used for high-speed storage, unrelated to remote access.

Option D (IDS - Intrusion Detection System): Monitors for malicious activities but does not provide secure access to applications.

? Reference: CompTIA Network+ (N10-009) Official Study Guide -- Section: Secure Remote Access Technologies