This roadmap walks you step-by-step through the essential networking concepts required for the CompTIA A+ and Network+ exams — and real-world IT troubleshooting.
Learn all 7 layers + memory tricks and troubleshooting examples.
Reliability vs speed and where each protocol is used.
Memorize key ports like 80, 443, 53, 22, 3389.
Understand local vs remote and why masks affect routing.
How devices automatically receive IP settings and leases.
Why 169.254 appears and what it means for troubleshooting.
How names resolve to IPs and what breaks when DNS fails.
How devices reach other networks and the internet.
How one public IP supports many private devices.
Layer roles, forwarding vs switching, and real-world use.
Allow/deny rules, ports, and common configurations.
Basic threats you’ll see on A+ and Network+.
A step-by-step approach to diagnosing network issues.
Step 1: Master the fundamentals above (A+ Level)
Step 2: Expand into advanced routing, VLANs, and network security (Network+ Level)
Step 3: Build hands-on labs using virtualization or home lab equipment
Compare the best CompTIA A+ study resources and practice exams.
View Best Study Resources