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Network+ · Learn
31 lessons in 5 units, about 55 h 15 min of reading and core practice. Each lesson ends with a quick check.
Specification
Unit 1
Core networking theory, addressing, protocols, media and modern delivery models that underpin every implementation and troubleshooting task on the exam.
7 lessons · 12 h 30 min of study · ≈23% of the test
Unit 2
Practical deployment and configuration of switching, routing, wireless, cabling and common network services and devices.
6 lessons · 11 h 30 min of study · ≈19% of the test
Unit 3
The processes, tooling, monitoring and resilience practices used to run networks safely, efficiently and continuously.
5 lessons · 8 h of study · ≈16% of the test
Unit 4
Security principles, threats, controls and secure access methods applied to modern wired, wireless and remote networks.
6 lessons · 11 h of study · ≈19% of the test
Unit 5
Methodical diagnosis and repair of physical, switching, routing, wireless, service and security-related network faults.
7 lessons · 12 h 15 min of study · ≈23% of the test
Start here
Networking concepts · Lesson 1 of 7
Covers the OSI and TCP/IP models, encapsulation and de-encapsulation, addressing at each layer, and the basic behavior of unicast, multicast and broadcast traffic. The exam tests this both as direct knowledge and in scenarios where you must trace packet flow through hosts, switches, routers and applications.
1 h 30 min of study≈3% of the test
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Every lesson is free to read. With an account, finished lessons are ticked off, quick checks feed your mastery, and flashcards come back for review.
Strategy, scoring and test day, beyond the syllabus.
Learn, then practise
Each lesson ends with three quick questions. For more, practice adapts to the topics you’re weakest on.
Open practice