Clear, practical networking explanations and CompTIA A+ study guides designed for real-world troubleshooting and exam success.
If you’re studying for CompTIA exams, these are two helpful starting points that pair well with the articles on this site.
Follow a structured learning path covering OSI, TCP/UDP, IP addressing, DHCP, DNS, and advanced networking topics.
If you're preparing for the CompTIA A+ exam, choosing the right study material can save you weeks of frustration — and hundreds of dollars in retake fees.
Understand reliability vs speed and when to use each protocol for the CompTIA A+ exam.
Learn all 7 OSI layers with memory tricks and troubleshooting examples for the CompTIA A+ exam.
A structured study hub that organizes DHCP, DNS, APIPA, subnet masks, and common ports into the best learning order.
Memorize the most important ports like 80, 443, 53, 22, and 3389 with simple memory tricks.
Understand common masks like 255.255.255.0 and how they affect local vs internet traffic.
Learn why 169.254 addresses appear and how to troubleshoot DHCP failures.
See how devices automatically receive IP addresses and how leases work.
Learn how DNS translates domain names into IP addresses and how to troubleshoot DNS issues for the CompTIA A+ exam.
Learn how the default gateway allows devices to reach the internet and how it appears on the CompTIA A+ exam.
Understand how routers translate private IP addresses to public ones and how NAT appears on the CompTIA A+ exam.