在两个认证之间选择

应该先考CompTIA Network+还是Security+？

除非你已经很懂网络,否则应该先考Network+。Security+会一直默认你了解流量、网段划分和协议的运作方式,并不会停下来做解释。

Network+ 详情 Security+ 详情
重叠之处

共同点

Network+设有网络安全域,Security+设有安全架构域,而后者严重依赖网络设计知识。这种重叠恰好落在大多数考生最容易卡壳的地方:理解为什么某个控制措施要部署在网络的这个位置。

  • Security+默认你懂网络,而不是反过来Security+关于网段划分、零信任、安全协议和流量检测的题目,只有在你已经了解底层网络运作方式的前提下才讲得通。Network+则没有类似的对安全知识的依赖。
  • Security+是要求更广泛的认证Security+是招聘要求中、在某些行业的合规基线中都会出现的认证。Network+虽然受尊重,但被强制要求的情况要少得多。
  • 两场考试的结构相似两者都是单场考试,最多90道题、90分钟,并穿插实操题(PBQ)和选择题。及格线不同——Network+是720分,Security+是750分——所以Security+留给你犯错的空间稍微小一些。
  • 跳过Network+是可行的,但代价不小如果你本来就每天和网络打交道,直接考Security+是说得通的。如果不是,你会在准备Security+的过程中顺带把网络知识补上,却拿不到相应的认证。
先后顺序

按顺序考取

先Network+再Security+是标准顺序,原因在于知识的依赖关系,而不是难度差异。如果你的目标是安全岗位而时间紧张,可以先学Network+的内容而不必一定去考那场考试,再去考Security+。

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+ · 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 · Security+ · Threats, vulnerabilities, and mitigations

An internet-facing service has an actively exploited vulnerability. The vendor has no patch yet, but offers a documented workaround that blocks the known exploit path. Which action best reduces immediate risk without claiming the flaw is permanently fixed?

Answer and explanation

Best answer: Validate and apply the workaround, monitor it, and track the pending patch

A validated compensating control can reduce exposure while the permanent fix is pending. Retain the vulnerability record, residual risk, and a plan to apply and verify the patch.

Why the other choices fit less well

Waiting leaves exposure unchanged, and a hostname change does not block the flaw. A workaround reduces risk without necessarily removing the vulnerability, so closing it as permanently fixed overstates the evidence.

CISA: known exploited vulnerabilities

Question 3 of 3 · Network+ · 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

Choose your next step

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继续比较

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