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| Certification Vendor: | CompTIA |
|---|---|
| Exam Name: | CompTIA Network+ Certification Exam (N10-009) |
| Exam Number: | N10-009 |
| Exam Format: | Multiple-response, Performance-based questions, Multiple-choice |
| Certificate Validity Period: | 3 years |
| Exam Duration: | 90 minutes |
| Exam Price: | USD 358 (varies by region) |
| Real Exam Qty: | Up to 90 |
| Passing Score: | 720 (on a scale of 100-900) |
| Related Certifications: | CompTIA A+ CompTIA Security+ |
| Available Languages: | Japanese, English, German, Thai, Spanish, Portuguese |
| Recommended Training: | CompTIA Network+ Training (Official) CertMaster Learn for Network+ |
| Exam Registration: | CompTIA Official Certification Page Pearson VUE Exam Registration |
| Sample Questions: | CompTIA N10-009 Sample Questions |
| Exam Way: | Online proctored or test center (Pearson VUE) |
| Pre Condition: | No mandatory prerequisites, but CompTIA A+ or equivalent knowledge is recommended |
| Official Syllabus URL: | https://www.comptia.org/certifications/network |
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問題 #235
What is the next step after implementing a solution to ensure that the system is functioning correctly?
答案：D
解題說明：
Verifying full system functionality occurs after implementing a fix. This step ensures the solution resolved the issue and that performance is back to expected levels. Comparing current throughput to baseline measurements is part of validation testing to confirm everything is within normal operational parameters.
* A. Implement the solution applies the fix but does not confirm results.
* C. Document findings happens at the end of troubleshooting.
* D. Test the theory comes earlier, when trying to confirm the suspected cause.
References (CompTIA Network+ N10-009):
* Domain: Network Troubleshooting - Troubleshooting methodology steps, baselines, verification testing.
問題 #236
Which of the following protocols is commonly associated with TCP port 443?
答案：D
解題說明：
TCP port 443 is reserved for HTTPS (Hypertext Transfer Protocol Secure), which uses TLS encryption to secure web traffic. It is the standard port for encrypted web communications.
A . Telnet uses TCP port 23.
B . SMTP commonly uses TCP ports 25, 465, or 587.
D . SNMP typically uses UDP ports 161 (queries) and 162 (traps).
Reference (CompTIA Network+ N10-009):
問題 #237
Which of the following is a characteristic of the application layer?
答案：A
解題說明：
Introduction to OSI Model:
The OSI model is a conceptual framework used to understand network interactions in seven layers:
Physical, Data Link, Network, Transport, Session, Presentation, and Application.
Application Layer:
The application layer (Layer 7) is the topmost layer in the OSI model. It provides network services directly to end-user applications. This layer facilitates communication between software applications and lower layers of the network protocol stack.
Reliance on Other Layers:
The application layer relies on the transport layer (Layer 4) for data transfer across the network.
The transport layer ensures reliable data delivery through protocols like TCP and UDP.
The network layer (Layer 3) is responsible for routing packets to their destination.
The data link layer (Layer 2) handles node-to-node data transfer and error detection.
The physical layer (Layer 1) deals with the physical connection between devices.
問題 #238
A user connects to a corporate VPN via a web browser and is able to use TLS to access the internal financial system to input a time card. Which of the following best describes how the VPN is being used?
答案：D
解題說明：
The scenario describes a user connecting to a corporate VPN via a web browser using TLS to access an internal system. This setup is best described as a "clientless" VPN. Clientless VPNs do not require a VPN client to be installed on the user's device; instead, they rely on a standard web browser to establish the connection. This method is particularly useful for providing secure, remote access to applications through a web interface without the need for additional software installations.
Reference: CompTIA Network+ Certification Exam Objectives - Remote Access Methods section.
問題 #239
A user calls the help desk after business hours to complain that files on a device are inaccessible and the wallpaper was changed. The network administrator thinks that this issue is an isolated incident, but the security analyst thinks the issue might be a ransomware attack. Which of the following troubleshooting steps should be taken first?
答案：B
解題說明：
The correct answer is Identify the problem, which is always the first step in the CompTIA Network+ N10-009 troubleshooting methodology. Before forming theories, creating action plans, or documenting outcomes, technicians must clearly understand what is happening, who is affected, and what symptoms are present.
In this scenario, the symptoms-inaccessible files and a changed wallpaper-are serious and potentially indicative of a security incident such as ransomware. However, at this stage, there is disagreement between the network administrator and the security analyst regarding the nature of the issue. That reinforces the need to begin with problem identification, which includes gathering information, determining the scope of impact, identifying recent changes, and assessing whether the incident is isolated or widespread.
Establishing a theory comes after the problem has been clearly defined. Creating a plan of action and documenting findings occur later in the process, once the issue has been confirmed and remediation steps are determined. Jumping ahead without properly identifying the problem could result in delayed containment or an incorrect response-especially critical in potential security incidents.
The Network+ objectives emphasize following the structured troubleshooting process precisely to reduce risk, prevent escalation, and ensure accurate resolution-particularly when malware or ransomware may be involved.
問題 #240
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