Certifications worth getting as a Network Administrator
Certificates cannot replace experience. For a network administrator, though, they do three useful things: they prove knowledge to an employer who has never seen your work, they give your study a clear structure, and they fill gaps that learning on the job often leaves. The real question is which ones to take, and in what order, so each builds on the last.
How this guide was made
Written for this site with AI assistance, then checked automatically before publishing. The topic table, sample questions, worked examples and study plan are generated from this site’s question bank: each worked example is recalculated by separate code, and each sample answer says where it came from.
The guide deliberately states no salaries, grades, pass marks or exam dates. Those change, and they could not be checked here, so take them from the advert itself.
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The certifications
CompTIA Network+
Networking concepts, IP addressing, infrastructure, operations, security and troubleshooting.
One exam, N10-009. No formal prerequisite.
Cisco CCNA
Network fundamentals, network access, IP connectivity, IP services, security fundamentals and automation.
One exam, 200-301. No formal prerequisite.
CompTIA Security+
Threats, security architecture, operations, identity and access, and security programme management.
One exam, SY0-701. No formal prerequisite.
CWNA (Certified Wireless Network Administrator)
Radio-frequency fundamentals, 802.11 standards, site surveys, wireless design and security.
One exam. No formal prerequisite.
Cisco CCNP Enterprise
Enterprise network design, routing, wireless, SD-WAN and automation.
A core exam (ENCOR 350-401) plus one concentration exam. CCNA-level knowledge is assumed.
Requirements and exam versions change. Confirm them with the issuer before you register.
Start with a foundation
Early in your career, CompTIA Network+ is a strong first choice. It is vendor-neutral, so it teaches networking concepts rather than one manufacturer's commands, and it covers addressing, infrastructure, operations, security and troubleshooting. That breadth matches the range of problems a network administrator actually meets.
If you already work with Cisco equipment, or want more depth in routing and switching, Cisco CCNA is the natural next step, and some people take it first. It is more configuration-focused and demands plenty of hands-on practice.
Add security early
Network administrators handle firewalls, access control and logs, so security knowledge is part of the job rather than an extra. CompTIA Security+ builds that foundation: threats, controls, identity and access, and security operations. Taken after Network+ or CCNA, it gives you a combination employers often ask for.
Specialise when the job needs it
Once the foundations are in place, choose by the work in front of you. If your network leans heavily on wireless, CWNA covers radio behaviour, site surveys and wireless design in far more depth than a general certificate. If you are moving toward network engineering and design, Cisco CCNP Enterprise is the professional-level route; it assumes CCNA-level knowledge and suits people with real hands-on experience.
What a certificate will not do
A certificate shows that you passed an exam. It does not show that you can stay calm during an outage, explain a problem to a manager, or plan a change that breaks nothing. Panels know this, so expect interview questions that test whether your certificate is backed by practice. A long list of certificates with no hands-on work can even count against you, because it raises the question of where the practical experience is.
Preparing without expensive courses
Every major certificate publishes its exam objectives. Download them and use them as your checklist. Pair a good study guide with plenty of hands-on practice in Cisco Packet Tracer or another lab tool, and use practice questions to find your weak areas. Official training helps but is not essential, and many people pass through disciplined self-study.
Check the current exam version and registration details with the issuer before you book, because exams are revised every few years.
Common questions
Network+ or CCNA first?
Network+ if you are new to networking or want a broad, vendor-neutral foundation. CCNA first if you already understand the basics and work with Cisco equipment. Both are respected, and many administrators end up holding both.
Do certificates expire?
Many do. CompTIA and Cisco certifications are valid for a fixed period and can be renewed through continuing education or a higher exam. Check the current renewal rules with the issuer.
Will a certificate help with a public-service application?
Only as far as the advert allows. Shortlisting follows the qualifications and experience an advert states. Where an advert lists a certificate as an advantage, or where the written test covers the same material, the study you did for it pays off directly.
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