在两个认证之间选择

该先考 CompTIA A+ 还是 Security+？

如果您是 IT 新手，先考 A+；如果您已经在做 IT 支持或系统管理工作，先考 Security+。A+ 讲的是计算机、操作系统和网络如何运作；Security+ 默认您已经懂这些，问的是如何保护它们。

A+ 详情 Security+ 详情
重叠之处

共同点

两者都涉及安全，但深度相差很大。A+ 有一个面向服务台的安全领域，比如终端、账户和无线网络的安全防护；而 Security+ 整个科目都是安全，从威胁和架构一直到运维和治理。

  • A+ 证明您能为用户提供支持A+ 在 Core 1 和 Core 2 中共涵盖九个领域：硬件、网络、移动设备、虚拟化与云、操作系统、安全、故障排除以及操作规程。它是服务台和桌面支持工作的通用基础。
  • Security+ 只考一场，A+ 要考两场A+ 需要通过两场考试：Core 1（220-1201）和 Core 2（220-1202），每场最多 90 道题、90 分钟，及格线分别为 675 和 700。Security+（SY0-701）只考一场，最多 90 道题、90 分钟，及格线为 750。
  • Security+ 默认您已掌握 A+ 的内容Security+ 的题目把操作系统、网络和常见硬件视为已知。没有这些基础，您备考 Security+ 的大量时间都会花在考试从不解释的基础知识上。
  • 两者打开的是不同的门A+ 是支持类岗位常见的入场券。Security+ 则出现在安全岗位的招聘要求和部分合规基线中，所以一旦您转向安全工作，它的分量更重。
先后顺序

按顺序考取

常见路径是先 A+，再 Network+，然后 Security+。如果您在工作中已经在处理操作系统和硬件，跳过 A+ 是合理的。同时跳过 A+ 和 Network+ 只有在您网络基础扎实时才行得通，因为 Security+ 自始至终都依赖网络知识。

试做三道题，弄懂每个答案。

英文原创练习示例，答案和解析就在本页，无需账户。这些是独立的教学示例，不是官方考试真题，也不是泄露的考试题库。

第 1 题，共 3 题 · A+ · Mobile devices and computer hardware

A laptop charges normally with its original USB-C adapter. On a compatible dock, data and video work, but the battery drains under load. The dock delivers less power than the laptop requires. Which change addresses the evidence with the least disruption?

答案与解析

最佳答案：Use a supported dock or power arrangement with sufficient delivered wattage

The measured power shortfall explains discharge under load even though data and video work. Use a supported arrangement that meets the laptop power requirement.

其他选项为何不够合适

Battery replacement is premature when the measured charging input is insufficient. Stable video does not indicate a graphics-driver fault; reducing refresh rate without checking the required and delivered wattage does not establish a supported charging arrangement.

USB-IF: power delivery

第 2 题，共 3 题 · 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?

答案与解析

最佳答案：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.

其他选项为何不够合适

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

第 3 题，共 3 题 · A+ · Operational procedures

A user asks you to reset a slow laptop. Their only copy of an important folder is on its internal drive. What should you do before starting a potentially destructive reset?

答案与解析

最佳答案：Back up the required files and verify that the backup can be read

Preserve the required data and verify the backup before a destructive operation. Confirm the destination and that the files open; an unverified backup is an assumption.

其他选项为何不够合适

A reset can remove data before recovery is possible. A renamed folder remains on the same drive. Cloud sync must be checked rather than presumed to cover local files.

Microsoft: reset your PC

选择您的下一步

免费练习题：A+ 20 道；Security+ 20 道。无需账户，无需银行卡；只有想在所有设备上保存学习进度时，才需要创建免费账户。

免费试做 20 道 A+ 题想先做个简短测评？试试 10 题的 A+ 诊断测试。
免费试做 20 道 Security+ 题想先做个简短测评？试试 10 题的 Security+ 诊断测试。

题库付费使用权为一次性购买，无需循环订阅。官方考试报名、考试券和机构实验环境均与 CertSprint 练习分开。

继续比较

A+ 练习测试 · Security+ 练习测试 · CompTIA A+ · CompTIA Security+ · 全部六个认证 · CertSprint 如何运作

A+ vs Network+ · Network+ vs Security+ · Security+ vs CySA+ · Security+ vs SC-200 · BTL1 vs Security+