https://blog.it-learn.io/tags/exam-prep/Recent content in Exam-Prep on it-learn.io | IT, Networking & Cybersecurity BlogHugoen-usWed, 10 Jun 2026 00:00:00 +0000https://blog.it-learn.io/posts/2026-06-10-osi-tcp-ip-layer-mapping-cheat-sheet-n10-009/Wed, 10 Jun 2026 00:00:00 +0000https://blog.it-learn.io/posts/2026-06-10-osi-tcp-ip-layer-mapping-cheat-sheet-n10-009/<p>Every Network+ exam attempt has 10–15 questions that test whether you can map a protocol, a piece of hardware, or a troubleshooting symptom to the correct OSI layer. Get those right and you bank 15 points. Get them confused and you lose a passing score over avoidable mistakes.</p> <p>The good news: layer questions are pure memorization with a tight set of mappings. This post is the complete cheat sheet — OSI&rsquo;s 7 layers, TCP/IP&rsquo;s 4 layers, the protocols that live at each, the hardware that operates there, and the specific traps the exam uses to catch people who memorized half the table.</p>https://blog.it-learn.io/posts/2026-06-09-subnetting-without-calculator-magic-number-method/Tue, 09 Jun 2026 00:00:00 +0000https://blog.it-learn.io/posts/2026-06-09-subnetting-without-calculator-magic-number-method/<p>There are two kinds of Network+ candidates. The ones who can subnet in their heads in under 30 seconds, and the ones who can&rsquo;t and run out of time on the exam. The gap between those two is one technique: the magic-number method.</p> <p>This post is the complete walkthrough — the trick, why it works, how to apply it to any prefix length, the worked example for /29 that comes up on every Network+ exam attempt, and the 5-minute practice routine that turns this from &ldquo;I sort of remember the trick&rdquo; into reflex.</p>