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CertificationsCisco200-301
Cisco助理级网络

Cisco Certified Network Associate (CCNA 200-301)

Cisco CCNA exam prep covering network fundamentals, access, IP connectivity, IP services, security basics, and automation. Includes 3,599 practice questions with explanations, simulation-style practice, a 120-minute exam format, and a passing score of 825/1000.

Try the first chapter freePractice questions
100
Official exam questions
120 min
Exam duration
825/1000
Passing score
JR ACADEMY / CERTIFICATION PREP

JR Academy practice bank

1,144practice questions
Build your foundation8 learning chapters
Practice with purposeFocused practice · answer explanations
Test your readinessMock exams · review

1,144 practice questions available

OverviewExam scopeLearning pathFAQReviews
01

Understand the certification

想做企业网络/电信/ISP 网工,CCNA 仍是 HR 第一眼筛简历的关键词,子网划分和 IOS 命令两关绕不开。

Cisco Certified Network Associate (CCNA 200-301) 是 Cisco 自 2020 年 2 月把多个旧 CCNA 方向(R&S、Security、Wireless、Collaboration、Cloud 等)合并后的统一入门认证。考试费 $300 USD(部分国家 $330),100-120 题 / 120 分钟,及格线 825/1000,证书有效期 3 年。续证方式有三种:重考、考更高级(CCNP/CCIE)、或在 3 年内攒够 30 个 Cisco Continuing Education (CE) 学分。

和 CompTIA Network+ 的本质区别是:CCNA 是厂商绑定的。整张考卷围绕 Cisco IOS 命令展开 — enable、configure terminal、show ip route、show running-config、router ospf 1 这些命令必须背到肌肉记忆,模拟题(Sim/Simlet)会直接给你一台虚拟 Cisco 路由器让你配 OSPF、ACL、VLAN trunk。Network+ 教你"路由协议是什么",CCNA 教你"在 Cisco 设备上敲哪几行命令把 OSPF 跑起来"。

很多人质疑 CCNA 的含金量,理由是 SD-WAN 和云的兴起让"传统路由交换"过时。事实是:Cisco 在全球企业级网络设备市场仍占约 45-50% 份额(IDC / Synergy Research 2024-2025 数据),尤其是大型企业、电信运营商、ISP、政府部门、银行的核心网。即便公司在迁云,办公网、园区网、数据中心 underlay 几乎都还是 Cisco(或 Cisco + Arista 混合)。澳洲 Telstra、Optus、TPG,美国 AT&T、Verizon,国内三大运营商的 NOC 招聘 JD 里 CCNA 是直接列出的关键词。

N10-009 没解决的痛点这里也有:考纲覆盖 6 大领域 — Network Fundamentals 20%、Network Access 20%、IP Connectivity 25%、IP Services 10%、Security Fundamentals 15%、Automation and Programmability 10%。最后那 10% 的自动化(REST API、JSON、Ansible、Puppet、SDN 控制器)是 2020 改版后加进来的,老一辈 CCIE 都觉得别扭,但这就是现在的考纲。

Hands-on 工具是 CCNA 的灵魂:Cisco 官方免费的 Packet Tracer 是 99% 考生的第一选择,能模拟 90% 的 CCNA 实验场景。进阶选择是 GNS3 或 EVE-NG(跑真正的 IOS 镜像,更贴近真机),以及 Boson NetSim(题库厂商,仿真度最高但收费)。光看视频不开 Packet Tracer 的人 100% 挂在 Sim 题上 — 这不是吓你,是过来人的共识。

Exam at a glance

Exam code
200-301
Provider
Cisco
Format
Single choice / Multiple select / Drag and drop / Simulation
Language
English / 日本語
Validity
3 years
Exam fee
$330
Official certification page

Skills in focus

TCP/IPSwitchingRoutingOSPFVLANSTPACLNATDHCPDNSWirelessNetwork SecurityAutomation

Learning outcomes

  • Prepare for the Cisco CCNA 200-301 exam with a structured study path
  • Build confidence in switching, routing, IP services, and entry-level security work
  • Develop the network troubleshooting skills expected in junior infrastructure roles
  • Create a solid foundation for CCNP and other advanced networking certifications

Who this is for

  • IT professionals who want a recognised entry point into networking
  • Junior network engineers and network administrators preparing for CCNA
  • Systems administrators expanding into switching, routing, and network troubleshooting
  • Students and career changers building a practical networking foundation

Before you start

  • No prior Cisco certification is required
  • Basic computer and command-line familiarity will help
  • A working understanding of TCP/IP and subnetting is recommended but not mandatory
  • Hands-on lab time with Packet Tracer, GNS3, or real Cisco gear is strongly recommended
02

What the exam tests

20%

Network Fundamentals

OSI 模型TCP/IPIPv4/IPv6VLAN无线网络交换概念
20%

Network Access

VLAN 配置TrunkEtherChannelSTP802.1Q无线 AP
25%

IP Connectivity

静态路由OSPF默认路由First Hop Redundancy路由表解读
10%

IP Services

NATDHCPDNSSNMPSyslogNTPQoS
15%

Security Fundamentals

ACLAAAPort SecurityDHCP SnoopingVPN无线安全
10%

Automation and Programmability

REST APIJSONAnsiblePuppetSDNCisco DNA Center
03

Your learning path

8 chapters

01CCNA Exam Overview and Study PlanFree02Network FundamentalsFree03Network Access120 min04IP Connectivity140 min05IP Services90 min06Security Fundamentals120 min
View the full learning path

Plan your preparation

Learning hours
60h
With relevant experience
8-12 weeks
Starting from scratch
16-24 weeks
Daily study
1.5-2h

Included in your preparation

  • 3,599 practice questions covering all six CCNA exam domains
  • Strong focus on subnetting, VLANs, routing, ACLs, NAT, and common troubleshooting tasks
  • Simulation-style practice to support command-line confidence
  • Mock exam aligned to the official 120-minute exam structure
  • Detailed explanations built to reinforce practical network reasoning, not just memorisation

1. 第一阶段:Packet Tracer 实操打底(2-3 周)

不要先看书,先装 Packet Tracer(Cisco NetAcad 免费下载,注册 Introduction to Networks 课程即可)。第一周按官方实验跑一遍:连两台路由器、配 IP、ping 通、查 ARP 表。目标是让"开 Packet Tracer 配命令"变成肌肉记忆,而不是查资料的负担。前期不要纠结 OSPF 多区域这种细节,先让自己对 IOS CLI 不再发怵。

2. 第二阶段:Wendell Odom OCG 系统精读(4-6 周)

Cisco 官方指定教材是 Wendell Odom 写的 CCNA 200-301 Official Cert Guide(两卷本,Volume 1 + Volume 2,共约 1500 页)。这是 CCNA 唯一权威系统教材,再贵也要买。每天 30-50 页,章末习题必做,重点在 IP Connectivity(OSPF 配置和 troubleshooting)和 Network Access(VLAN/STP/EtherChannel)。看完一章立刻去 Packet Tracer 把命令敲一遍,不然第二天就忘。

3. 第三阶段:子网划分死磕(贯穿全程,集中冲刺 1 周)

子网划分是 CCNA 的送分题也是送命题。考场上没有计算器,必须手算或心算。目标:给任意 CIDR(如 172.16.45.130/26),15 秒内说出网段、广播、可用主机、下一个子网起点。推荐 subnettingpractice.com 每天刷 20 道,连续两周必有质变。再配合 Anki 制作 CCNA 子网划分 flash cards,碎片时间反复过。考前两周每天写一遍 /24-/30 的 magic number 表(128/64/32/16/8/4)。

4. 第四阶段:Boson ExSim / GNS3 拔高(2-3 周)

OCG 看完后用 Boson ExSim-Max for CCNA(题库行业金标准,但 $99)做模考。Boson 的 Sim 题难度比真实考试稍高,能在 Boson 稳定 80% 基本就稳了。同时用 GNS3 或 EVE-NG 跑真实 IOS 镜像练习多区域 OSPF、HSRP、ACL 复杂场景 — 比 Packet Tracer 更接近真机。这一阶段必须把 OSPF vs EIGRP 的差异背到能默写出来:管理距离 110 vs 90、metric(cost vs composite)、邻居关系建立流程、DR/BDR 选举(OSPF 有,EIGRP 没有)。

5. 第五阶段:Sim/Simlet 题专项 + 全真模考(最后 2 周)

Sim 题在 CCNA 里权重很高(每道值 10-15 分),错一道直接拉低 50 分。最后两周专攻 Sim:去 YouTube 搜 "CCNA Sim walkthrough" 把常见配置场景过一遍 — VLAN trunking、Inter-VLAN routing、OSPF 单区域、Standard/Extended ACL、PAT 配置。考前 3 天只做错题和 flash card,不要再开新内容。考试当天前 30-40 分钟先把 Sim 全部解决(不能跳回去!CCNA 题目一旦提交不能回头),剩下时间集中处理选择题。

04

Career value

CCNA 在求职市场上的真实定位

CCNA 不是"考完就升职"的证,但它是网络岗位面试的隐性 dress code。在 LinkedIn 和 Seek 上搜 "Network Engineer" 的澳洲岗位,超过 70% 的 JD 直接写 "CCNA required" 或 "CCNA preferred"。Telstra、Optus、NBN 这些电信巨头的 NOC graduate program 把 CCNA 列为优先项;MSP(Managed Service Provider)和系统集成商(如 Data#3、Brennan IT)几乎是必备。国内华为系崛起冲击了一部分 Cisco 市场,但运营商和大型外企的网络部门 CCNA 仍是硬通货。

根据 Indeed / Glassdoor 2025 年数据,澳洲持有 CCNA 的 Junior Network Engineer 起薪在 $75-85K AUD 区间,工作 2-3 年到 Mid-level 后 $95-115K 是常见档位,进一步考 CCNP 之后 $120-150K。美国市场起薪 $70-85K USD,有 CCNA + 2 年经验的 Network Engineer 中位数约 $92K(BLS 2024 数据)。

最适合考 CCNA 的三类人:

  1. 想做企业网络/电信/ISP 工程师的人:这是 CCNA 的本命场景。NOC 7×24 倒班、园区网运维、骨干网工程、运营商接入网 — 这些岗位的招聘门槛就是 CCNA。
  2. 已经在做 IT 运维想转网络方向:你已经会 Windows Server、AD、基础脚本,但碰到交换机配置就发怵。CCNA 帮你从"会按照 wiki 复制命令"过渡到"理解为什么要敲这些命令"。
  3. CompTIA Network+ 持证者想往 Cisco 生态深入:Network+ 教概念,CCNA 教 Cisco 实操。两张证组合在简历上对网工岗位的杀伤力比单独任何一张都强。

不太适合考 CCNA 的人:

  • 目标是纯云架构师(AWS/Azure)的人:你应该直接 SAA-C03 或 AZ-104。云厂商的 VPC/VNet 概念虽然底层是 Cisco 那一套,但日常工作不会用到 IOS 命令。CCNA 对你来说是"绕远路"。
  • 软件开发者:写后端、写前端、写移动端,CCNA 里的 STP 选举、OSPF DR/BDR、VLAN trunking 这些知识完全用不到。理解 TCP/HTTP/DNS 的程度足够了。
  • 追求"快速跨行"的转行者:CCNA 不像 CLF-C02 或 Network+ 那样能 4 周拿下,正常人需要 3-6 个月扎实备考,且必须配合大量 Packet Tracer 实操。如果你只是想短平快有张证刷简历,先考 Network+。
Network EngineerNOC AnalystNetwork AdministratorField Network EngineerISP EngineerTelco Network EngineerMSP Network Engineer网络工程师网络运维工程师通信工程师
澳洲
AUD 75,000 – 115,000
美国
USD 70,000 – 110,000
中国
CNY 150,000 – 280,000
新加坡
SGD 55,000 – 88,000

Preparation tips

  • **Sim 题先做**:CCNA 的 Sim/Simlet 集中在考试前半段,每道值 10-15 分。前 30-40 分钟全力解决,做完再做选择题。别像 CompTIA 那样跳过 PBQ — CCNA 不能跳!
  • **Sim 题必存配置**:每完成一个 Sim 配置,立刻 `do copy run start`(或 `write memory`)保存。否则考试关闭那道题就重置,0 分。
  • **子网速算用 Magic Number 法**:开考先在白板写 128/64/32/16/8/4,对应 /25 到 /30。后面所有子网题查这张表 + 心算。
  • **遇到不熟悉的命令选项用排除法**:CCNA 选择题经常给 4 个看起来都对的命令,实际只有 1 个语法/层级正确。先排掉明显错误的(比如在 Global config 模式下用 Interface 命令)。
  • **Automation 题别裸答**:REST API 题问 method(GET/POST/PUT/DELETE)、JSON 题问语法(key-value、嵌套),这两类是送分题。Ansible 题如果没学过基本只能猜,但权重不大,别浪费时间纠结。
  • **时间分配**:100 题 / 120 分钟 ≈ 1.2 分钟/题,但 Sim 一道要 8-10 分钟。建议 Sim 总共留 30-40 分钟,剩下 80-90 分钟做 90+ 道选择题,平均 50-55 秒一题。
  • **ESL 加时**:母语非英语考生可申请 ESL +30 分钟,CCNA 的英文长句很多,加时几乎是必须的。

Common mistakes

  • **只看视频不开 Packet Tracer** — CCNA 跟 Network+ 最大的差异就在这里。视频里看老师敲 `router ospf 1` 自己却没碰过键盘,Sim 题上场就抓瞎。每节课后必须自己复刻一遍命令。
  • **子网划分依赖工具** — 考场没有外置计算器,浏览器里也没有 subnet calculator。只有草稿纸。**练到 15 秒口算**才能保证 PBQ 和 Sim 里不丢分。
  • **死背 IOS 命令而不理解作用** — Cisco 命令体系庞杂(Global config / Interface config / Router config 切换层级很多),背 `switchport mode trunk` 没用,要理解"什么时候 access 什么时候 trunk、为什么要配 native VLAN"。
  • **OSPF 和 EIGRP 混淆** — 经典送命题。记住:OSPF 是 link-state、AD 110、metric 是 cost (10^8/带宽)、有 DR/BDR;EIGRP 是 advanced distance vector、AD 90 (内部) / 170 (外部)、metric 是 K 值复合(默认看带宽和延迟)、没有 DR 概念。两者都支持等价路径负载均衡,EIGRP 还支持非等价(variance)。
  • **VLAN trunk 配置漏掉 native VLAN** — Sim 题里如果两台交换机的 native VLAN 不一致会触发 CDP 告警,这是高频陷阱。配 trunk 必须明确 `switchport trunk native vlan X` 双方一致。
  • **过度依赖 Packet Tracer,不接触真机或 GNS3** — Packet Tracer 简化了一些命令和报错,真实 IOS 会有 PT 上看不到的行为差异(特别是 OSPF 邻居建立细节)。冲刺阶段建议至少用 GNS3 或 EVE-NG 跑一周真实镜像。
  • **Sim 题以为可以回头改** — CCNA 考试一旦点了 Next 就不能回到上一题,Sim 题尤其要确认配置都 `copy running-config startup-config` 保存了再 Next。这条规则每年都有人栽。
05

Before you register

How difficult is the CCNA 200-301 exam? What is the pass rate?

CCNA is an Associate-level certification with moderate difficulty. The exam covers 6 domains and requires both theoretical knowledge and practical configuration skills. The passing score is 825/1000 with 100-120 questions in 120 minutes. Cisco does not publish official pass rates, but industry estimates suggest around 50-60% on the first attempt. A structured study plan of 3-6 months is recommended.

How does the new unified CCNA 200-301 differ from the old CCNA tracks?

Since February 2020, Cisco consolidated multiple CCNA specializations (Routing & Switching, Security, Wireless, etc.) into a single unified CCNA 200-301 exam. The new exam covers a broader range of topics including network fundamentals, IP connectivity, security fundamentals, and automation/programmability. This means you no longer need separate exams for different tracks — one exam, one certification.

What question types appear on the CCNA exam? Are there hands-on labs?

The CCNA 200-301 exam includes multiple-choice (single and multi-select), drag-and-drop, and simulation/lab questions. The simulation questions test your ability to configure Cisco devices using CLI commands. You may be asked to configure VLANs, OSPF routing, ACLs, or NAT on a simulated router or switch. These lab questions carry significant weight, so hands-on practice with Cisco Packet Tracer or GNS3 is essential.

How long is the CCNA certification valid? What are the renewal options?

CCNA certification is valid for 3 years. To renew, you have several options: (1) Retake the CCNA 200-301 exam; (2) Pass a higher-level exam such as CCNP ENCOR 350-401; (3) Earn Continuing Education (CE) credits through Cisco learning activities — you need 30 CE credits within the 3-year period. Most professionals choose to pursue CCNP as it both advances their career and renews the CCNA.

Which CCNA exam domains carry the most weight? How should I allocate study time?

IP Connectivity has the highest weight at 25%, covering routing protocols (OSPF), static routing, and first-hop redundancy. Network Fundamentals and Network Access each account for 20%. Security Fundamentals is 15%, while IP Services and Automation/Programmability are 10% each. Prioritize IP Connectivity and Network Fundamentals, but do not neglect Automation — it includes REST APIs, Ansible, Puppet, and JSON/YAML data formats, which are increasingly common in the exam.

06

Learner experiences

Loading reviews…

我之前在 helpdesk 接电话,2024 年下决心转网络。OCG 两本啃了 10 周,最后 4 周纯刷 Boson + Packet Tracer。Sim 题考了 OSPF 单区域 + ACL 两道,幸亏练过几十遍闭眼能敲。最大的体会:别相信任何说"两个月过 CCNA"的帖子,那种人要么是已经做了几年网络,要么是吹的。老老实实 3-4 个月。

D. Nguyen

Telstra NOC Analyst (L1 → L2) · 892/1000 · 14 weeks

我已经在 MSP 配了两年 Cisco 设备但没考证,老板要求所有 engineer 都要有 CCNA 才能投标某个项目。备考时最大的坑是 automation 那 10% — 我以前从没碰过 REST API 和 JSON,结果考试出了 3 道题。现在回头看建议是:哪怕你 IOS 命令再熟,automation 那一章也要老老实实学,别裸过。

A. Patel

企业网络管理员,MSP · 847/1000 · 11 weeks

裸考前我以为 Linux + 基础网络知识够用了,结果第一次模考 620 分直接劝退。问题是 Cisco 的命令逻辑和 Linux 完全不一样,OSPF 和 BGP 的工作机制也不是看 wiki 能秒懂的。子网划分我练了整整三周,从一开始 60 秒一题到最后 10 秒一题。考场上 Sim 题手抖配错 VLAN ID 还回不去,最后险过。建议零基础至少留 4-5 个月。

运维工程师 4 年

想从 Linux 运维转网络 · 831/1000 · 18 weeks

07

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