One of the biggest misconceptions I see from people getting into network engineering, or any IT role, is the idea that “real engineers” memorize everything. Early on, I used to think the same thing. I thought the senior engineers and architects I looked up to had every command, protocol, and troubleshooting step permanently stored in their heads. The longer I’ve been around them, the more I realized that isn’t reality at all. Some of the smartest people I’ve worked with regularly use cheat sheets, reference documents, diagrams, and notes as part of their daily workflow. They have something printed off hung next to their monitors, or pinned in their bookmarks bar on their web browser.

The truth is, using a cheat sheet doesn’t mean you don’t know the material. In fact, it often means the opposite. Experienced engineers understand just how much information exists in networking and IT. Between routing protocols, switching concepts, wireless, firewalls, cloud networking, automation, and vendor-specific syntax, nobody is realistically going to memorize every single detail forever. Senior engineers and architects know that accuracy matters more than ego. They’d rather double-check a command or verify a design detail than rely on memory and accidentally cause an outage.

I especially learned the value of cheat sheets once I started thinking about real-world operational work. It’s easy to say “just memorize it” when you’re studying during the day with coffee in hand. It’s a completely different situation when you’re on-call and your phone starts ringing at 2 am because something critical is broken. At that point, nobody cares whether you memorized every OSPF neighbor state or every wireless controller command from memory. What matters is getting the issue resolved correctly and quickly. A well-organized cheat sheet can become a lifesaver during those moments because it gives you fast access to important commands, troubleshooting steps, and reminders when your brain is still trying to wake up.

One of my professors said something years ago that stuck with me throughout my career. He mentioned that when you’re out in the field, nobody is going to expect you to know absolutely everything off the top of your head. Instead, you’re going to have tools available to help you succeed, and you shouldn’t be afraid to use them. That advice applies perfectly to cheat sheets. They’re just another tool in your tool belt. Good engineers use the resources around them efficiently, and reference material is one of those resources.

I also think cheat sheets help people learn faster, especially when breaking into networking for the first time. When you’re new, the amount of information can feel overwhelming. Having a quick reference guide for subnetting, VLAN tagging, routing commands, or wireless concepts helps reduce some of that pressure. Instead of feeling like you need to memorize everything, you can focus on understanding the concepts first. Over time, the repeated exposure naturally helps many of those commands become a second nature.

Another thing I’ve noticed is that creating your own cheat sheets can actually become part of the learning process. No reference guide is the all around perfect guide, and will have everything you need on it, sometimes you need to make something that works for you, and your role. Some of the best notes I’ve used were ones I built myself while labbing or troubleshooting. Writing things down forces you to organize information in a way that makes sense to you personally. Maybe you build a one-page BGP troubleshooting guide, a Cisco CLI reference, or a router deployment checklist. Over time, those documents become valuable not only for studying, but also for your real day-to-day work.