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| Certification Vendor: | CompTIA |
|---|---|
| Exam Name: | CompTIA Network+ Certification Exam (N10-009) |
| Exam Number: | N10-009 |
| Certificate Validity Period: | 3 years |
| Passing Score: | 720 (on a scale of 100-900) |
| Real Exam Qty: | Up to 90 |
| Exam Format: | Multiple-choice, Performance-based questions, Multiple-response |
| Available Languages: | German, Portuguese, Spanish, Thai, Japanese, English |
| Exam Duration: | 90 minutes |
| Related Certifications: | CompTIA A+ CompTIA Security+ |
| Exam Price: | USD 358 (varies by region) |
| Recommended Training: | CertMaster Learn for Network+ CompTIA Network+ Training (Official) |
| Exam Registration: | Pearson VUE Exam Registration CompTIA Official Certification Page |
| 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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質問 # 345
Users are unable to access files on their department share located on flle_server 2. The network administrator has been tasked with validating routing between networks hosting workstation A and file server 2.
INSTRUCTIONS
Click on each router to review output, identity any Issues, and configure the appropriate solution If at any time you would like to bring back the initial state of trie simulation, please click the reset All button;
正解：
解説：
See the solution configuration below in Explanation.
Explanation:
A screenshot of a computer AI-generated content may be incorrect.
A screenshot of a computer AI-generated content may be incorrect.
A screenshot of a computer AI-generated content may be incorrect.
質問 # 346
A network engineer troubleshoots an issue with an SMTP relay server. The engineer suspects the issue is related to a reverse DNS lookup failure. Which of the following should the engineer implement to resolve the issue?
正解：D
解説：
The engineer should implement a PTR record. A PTR record is used for reverse DNS lookup, which maps an IP address back to a hostname. This is the opposite of an A record, which maps a hostname to an IPv4 address. Mail systems commonly use reverse DNS lookups as part of anti-spam and mail reputation checks. If an SMTP relay server does not have a valid PTR record, receiving mail servers may reject, delay, or flag messages as suspicious.
The CompTIA Network+ N10-009 objectives include DNS record types, name resolution, email-related records, and troubleshooting network services. PTR records are specifically associated with reverse lookup zones and are the correct record type when the problem involves resolving an IP address to a domain name.
DNSSEC adds cryptographic validation to DNS responses, helping protect against DNS spoofing or tampering, but it does not create reverse DNS mappings. An MX record identifies mail exchangers for a domain, but it does not resolve an IP address back to a name. DoT, or DNS over TLS, encrypts DNS queries.
Therefore, PTR is the correct answer.
Top of Form
質問 # 347
Which of the following requires network devices to be managed using a different set of IP addresses?
正解：A
解説：
Out-of-band (OOB) management refers to using a dedicated management network that is physically separate from the regular data network. This management network uses a different set of IP addresses to ensure that management traffic is isolated from user data traffic, providing a secure way to manage network devices even if the main network is down or compromised.Reference: CompTIA Network+ study materials.
質問 # 348
Which of the following cable types provides the highest possible transmission speed?
正解：D
質問 # 349
A network administrator is unable to ping a remote server from a newly connected workstation that has been added to the network. Ping to 127.0.0.1 on the workstation is failing. Which of the following should the administrator perform to diagnose the problem?
正解：A
解説：
The failure of a ping to 127.0.0.1 (the loopback address) indicates a problem with the workstation's TCP/IP stack or network interface card (NIC). Since 127.0.0.1 is a local address, the issue is not related to the network, router, or DNS. The first step in diagnosing this issue is to verify the NIC interface status to ensure the network adapter is functioning and properly configured.
Why not Verify the network is not congested? Network congestion affects external connectivity, not the loopback address.
Why not Verify the router is not dropping packets? Router issues are irrelevant since the loopback ping fails locally.
Why not Verify that DNS is resolving correctly? DNS resolution is not involved in pinging 127.0.0.1, which uses a direct IP address.
Reference:CompTIA Network+ N10-009 Objective 5.2: Explain the troubleshooting methodology. The CompTIA Network+ Study Guide (e.g., Chapter 13: NetworkTroubleshooting) emphasizes that a failed loopback ping indicates a local TCP/IP stack or NIC issue, and checking the NIC status is the first diagnostic step.
質問 # 350
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N10-009復習内容: https://www.passtest.jp/CompTIA/N10-009-shiken.html
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