Free Practice Questions for CompTIA N10-009 Exam

Understanding Tracert:

Traceroute Tool: tracert (Windows) or traceroute (Linux) is a network diagnostic tool used to trace the path that packets take from a source to a destination. It lists all the intermediate routers the packets traverse.

Determining Traffic Path:

Path Identification: By running tracert to the web application's destination IP address, the technician can identify which route the traffic is taking and thereby determine which internet link is being used.

Load Balancing Insight: If the office uses load balancing for its internet links, tracert can help verify which link is currently handling the traffic for the web application.

Comparison with Other Tools:

netstat: Displays network connections, routing tables, interface statistics, and more, but does not trace the path of packets.

nslookup: Used for querying DNS to obtain domain name or IP address mapping, not for tracing packet routes.

ping: Tests connectivity and measures round-trip time but does not provide path information.

Implementation:

Open a command prompt or terminal.

Execute tracert [destination IP] to trace the route.

Analyze the output to determine the path and the link being used.

•The total number of devices = (150 + 10) users × 2 IPs per user = 320 devices

•Class C (D) supports a maximum of 254 hosts (2^8 - 2), which is too small.

•Class B (B) supports 65,534 hosts (2^16 - 2), making it the best choice.

•Why not the other options?

•Class A (C): Supports millions of addresses, which is overkill for 320 devices.

•Class D (A): Used for multicast, not for device addressing.

802.1X is a port-based Network Access Control (NAC) method that enforces authentication before allowing access to the network. It uses a RADIUS server for identity verification and policy enforcement, ensuring only authorized users/devices gain access.

A. Standard ACL filters traffic by IP, not identity.

B. MAC filtering controls devices by hardware address but can be spoofed.

D. SSO (Single Sign-On) provides user convenience across services, not network-level access control.

References (CompTIA Network+ N10-009):

Domain: Network Security — NAC, 802.1X authentication, identity-based access.

Understanding VoIP and VLANs:

VoIP (Voice over IP) phones often use VLANs (Virtual Local Area Networks) to separate voice traffic from data traffic for improved performance and security.

Tagging Traffic to Voice VLAN:

Voice VLAN Configuration: The port on the switch needs to be configured to tag traffic for the specific voice VLAN. This ensures that voice packets are prioritized and handled correctly.

VLAN Tagging: VLAN tagging allows the switch to identify and separate voice traffic from other types of traffic on the network, reducing latency and jitter for VoIP communications.

Comparison with Other Options:

Trunk all VLANs on the port: Trunking all VLANs is typically used for links between switches, not for individual device ports.

Configure the native VLAN: The native VLAN is for untagged traffic and does not address the need for separating and prioritizing voice traffic.

Disable VLANs: Disabling VLANs would mix voice and data traffic, leading to potential performance issues and lack of traffic separation.

Implementation:

Configure the switch port connected to the VoIP phone to tag the traffic for the designated voice VLAN, ensuring proper network segmentation and quality of service.

A proxy server can filter internet access by controlling which websites or services users can reach. It enforces content policies and can provide caching and monitoring.

A. A router directs traffic but doesn’t filter internet sites by itself.

B. A cloud gateway could also filter, but the most direct answer is proxy.

D. An IDS detects suspicious activity but doesn’t filter browsing access.

References (CompTIA Network+ N10-009):

Domain: Network Security — Proxy servers, filtering, access control.

Troubleshooting Methodology:

Troubleshooting involves a systematic approach to diagnosing and resolving issues. It typically includes steps such as identifying symptoms, gathering information, formulating and testing theories, and implementing solutions.

Confirming a Theory:

Duplicate the Problem: To confirm a theory, the technician should reproduce the problem in a controlled environment. This helps verify that the identified cause actually leads to the observed issue.

Verification: By duplicating the problem, the technician can observe the issue firsthand, validate the hypothesis, and rule out other potential causes.

Comparison with Other Steps:

Identify the Symptoms: Initial step to understand what the problem is, not specifically for confirming a theory.

Gather Information: Involves collecting data and details about the issue, usually done before formulating a theory.

Determine Any Changes: Involves checking for recent changes that could have caused the issue, a part of the information-gathering phase.

Implementation:

Use similar equipment or software in a test environment to recreate the issue.

Observe the results to see if they match the original problem, thereby confirming the theory.

A mesh network is the best solution for providing reliable wireless service to public safety vehicles. In a mesh network, each node (vehicle) can connect to multiple other nodes, providing multiple paths for data to travel. This enhances reliability and redundancy, ensuring continuous connectivity even if one or more nodes fail. Mesh networks are highly resilient and are well-suited for dynamic and mobile environments such as public safety operations.References: CompTIA Network+ study materials.

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

Quality of Service (QoS) prioritizes delay-sensitive traffic such as VoIP by assigning higher priority in queues, reducing jitter, latency, and packet loss. Implementing QoS policies ensures stable and clear voice communication.

B. STP (Spanning Tree Protocol) prevents switching loops, but it does not address jitter or real-time traffic performance.

References (CompTIA Network+ N10-009):

Domain: Network Infrastructure — QoS, traffic shaping, prioritization of voice/video.