CompTIA · 考试 N10-009

围绕考试实际考察的判断力设计的 Network+ 练习题。

Learn to deploy, operate, secure, and troubleshoot modern wired, wireless, cloud, and hybrid network environments.

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内容审核于 2026年10月

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限时模拟考试

一次完整的限时模拟，包含 Network+ 道练习题，提交前不显示任何反馈——最接近真实考试的体验。

开始限时模拟
为你的下一次尝试而设计

有目标的备考。

Network technicians, infrastructure specialists, and support professionals preparing to prove vendor-neutral networking and troubleshooting skills.

CertSprint 结合了针对性练习、详细解析、基于表现的任务和分领域的准备度评估，让每次练习都清楚告诉你接下来该学什么。

完整题库

超越 20 道题的预览版，进入围绕当前考纲的技能与场景组织的完整题库。

有启发性的解析

了解为什么正确答案符合证据，以及为什么其他选项不成立，从而培养判断力而不是死记硬背。

PBQ 与应用场景题

练习排序、匹配、排查和配置类任务，让知识在考试压力下也能真正用得上。

按领域评估准备度

正确率会映射到各考试领域，揭示薄弱环节，把考试日期变成切实可行的每日练习目标。

你将练习的内容

专注于 Network+ 的覆盖范围。

整个体验围绕相关的判断与故障排查设计，而不是零散的知识点。

  • Network architecture and protocols
  • Routing, switching, wireless, and cloud
  • Operations, security, and troubleshooting

Try three questions. Understand every answer.

Original English practice examples, with answers and explanations available here. No account required. These are independent teaching examples, not official exam questions or exam dumps.

Question 1 of 3 · Network architecture and protocols

Small packets cross a VPN, but larger packets fail. A capture shows that fragmentation is blocked, while the physical links remain healthy. Which investigation best targets the size-dependent failure?

Answer and explanation

Best answer: Path MTU and tunnel overhead

Tunnel overhead reduces available packet size. Examine the path MTU and the handling of packets that exceed it before changing unrelated services.

Why the other choices fit less well

DNS caching, application timeout, and DHCP lease duration do not explain a verified packet-size boundary across the tunnel.

IETF: path MTU discovery

Question 2 of 3 · Networking concepts

Which address belongs to an RFC 1918 private IPv4 range and requires an appropriate gateway or translation arrangement to communicate with the public internet?

Answer and explanation

Best answer: 172.20.14.8

172.20.14.8 lies within 172.16.0.0/12, one of the RFC 1918 private ranges. Private addresses are not globally unique public internet addresses.

Why the other choices fit less well

172.32.14.8 is outside 172.16.0.0–172.31.255.255. 192.169.1.8 is outside 192.168.0.0/16, and 11.0.0.8 is outside 10.0.0.0/8.

IETF: private IPv4 address allocation

Question 3 of 3 · Network troubleshooting

One client cannot resolve an internal hostname. It reaches the service by IP, while another client resolves the same name. Which comparison is most useful first?

Answer and explanation

Best answer: The clients’ configured DNS resolvers and their answers

Compare the resolver configuration and query results on the working and failing clients. This tests the observed name-resolution difference without disrupting a reachable service.

Why the other choices fit less well

Display resolution, window size and keyboard layout do not explain the different DNS responses. Broader infrastructure changes would need additional evidence.

Microsoft: test DNS queries with nslookup

Choose your next step

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考试是如何进行的

准确了解考试当天的情况。

CompTIA Network+（N10-009）官方考试形式 — 预约前请到官方网站确认最新价格和政策，因为这些可能会变化。

形式1 exam
题目数量Up to 90 questions
时长90 minutes
及格分数720 (scored on a 100–900 scale)
题型Multiple-choice (single and multiple response) plus performance-based questions (PBQs)
考试方式Pearson VUE test center or online proctored (OnVUE)
重考政策Immediate retake allowed after a first fail; a 14-day wait applies before a third attempt
学习计划

一份按真实题库权重分配的 5 周计划。

每周的时长与该领域实际拥有的 Network+ 练习题数量成正比，而不是通用模板。可在仪表盘中跟踪真实进度。

  1. 1

    Networking Concepts

    21% of the full question bank — the single largest block this week.

    约每天 16 题
  2. 2

    Network Implementation + Network Operations

    Smaller domains grouped together to keep every week substantive.

    约每天 30 题
  3. 3

    Network Security + Network Troubleshooting

    Smaller domains grouped together to keep every week substantive.

    约每天 31 题
  4. 4

    Cumulative review

    Mixed practice across every domain, prioritizing whichever ones your readiness tracker shows below 80% accuracy — not a fixed list, but whatever the data says is weakest this week.

  5. 5

    Timed mock exam

    Simulate the real exam: one sitting, the real question count and time limit, no pausing. Re-drill any domain that comes in under 80%.

用数据说话

在考试日发现之前，先找到你的薄弱领域。

免费试做 20 道 Network+ 题目。准备好后再解锁完整练习空间。

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有依据地练习

理解答案背后的判断。

先分析情境，找出关键证据，再对照解析检查自己的推理。根据各领域的得分决定下一次复习重点。练习正确率只能提示学习进度，不能预测正式考试成绩，也不等同于官方分数。

最新练习集提供八种语言版本。较早的练习可能以英语显示。这些是独立编写的原创练习情境，并非官方考试题目。