Aug 29, 2025
He's learning subnetting and converting to binary and he's being so brave about it
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He's learning subnetting and converting to binary and he's being so brave about it
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Every time they try to reinvent math it gets worse.
What is this shit? In the time it took me to get through this shitty version of an easy process I could have manually mathed my way through it already. And this is only step one.
Subnetting
The CCNA Subnetting Questions Hit Different at 2 AM
Real talk. I studied for the CCNA while working full-time, and most of my study sessions happened after 10 PM. If you've ever tried to calculate a /27 subnet mask when your brain wants to shut down, you know exactly what I mean.But I passed. 870 out of 1000. And here's what actually helped.Forget the 200-page study guidesEveryone recommends the OCG (Official Cert Guide). It's like 1,500 pages. I read maybe 400 of them before I realized I was retaining nothing.What worked instead: lab everything. I set up Packet Tracer and literally built networks. VLANs, trunking, OSPF, ACLs — I configured them all by hand until the CLI felt natural.The three topics that matter most1. Network Access (20%) — VLANs, trunking (802.1Q), EtherChannel, WLAN configuration.2. IP Connectivity (25%) — Routing is 25% of the exam. OSPF single-area, static routes, default routes.3. Security Fundamentals (15%) — Port security, DHCP snooping, dynamic ARP inspection, AAA concepts.Subnetting — the make-or-break skillYou need subnetting to be automatic. Not "let me think about it" — automatic.My trick: I wrote subnet charts on flashcards and drilled them during lunch breaks. /24 = 256 hosts, /25 = 128, /26 = 64... all the way down to /30 = 4 hosts (2 usable).The exam experience120 questions in 120 minutes. Mix of multiple choice, drag-and-drop, and simulations.I scored weakest on automation (10% of the exam). Cisco added network programmability, REST APIs, and JSON/YAML to the CCNA. Spend time on it.Is the CCNA still worth it in 2026?100%. Networking isn't going away just because cloud exists.The CCNA 200-301 practice test questions on ExamCert are solid for testing whether you're actually ready.Start subnetting. Start labbing. Stop just reading. And maybe study before 2 AM.
How to Use a Network Mask Cheatsheet to Speed Up Subnetting in 2025 Learn more here:
https//businesseshubs.com/how-to-use-a-network-mask-cheatsheet-to-speed-up-subnetting-in-2025/
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Alright I figured out the subnetting thing.
It's a good thing I'm a fan of aerobics because the kinda stress this math puts me under cannot be good for my heart. I've been relearning subnetting again and again over the years and this is by far the worst way I've had to do it lmao.
Though to it's credit it's probably quick if you memorize that honker of a table on the left.
~ 5/27/25
30m - Reviewed last week's notes on classful subnetting
2h - Practiced subnetting techniques
1h - Created a flashcard set on anki with conceptual questions/problem sets to help with retaining what I learned
A study published on ResearchGate states that subnetting is essential for network administrators or people dedicated to managing the network
How to Use a Network Mask Cheatsheet to Speed Up Subnetting in 2025 We will explore the in-depth process of enhancing subnetting using network mask cheat sheets.