01
OSI Model Lab
Drag a packet down the stack and back up again. Each layer shows what it adds, strips, and checks. Frames, headers, the lot.
Browser-based network training for absolute beginners
Learn networking by doing it in your browser
SubnetSandbox runs interactive virtual IT labs in the browser so beginners practise subnetting, the OSI model, and packet flow without touching production gear.
Nothing to set up on your machine. Open a tab, pick a lab, and start clicking through a sample network.
Sandbox consoleLab demo
Try it: A host at 192.168.10.42 cannot reach the gateway. Is it the mask, the route, or the VLAN? Work it out in the sandbox.
Topology
Packet
Result
Reset as often as you like. Nobody breaks a real network here.
64guided lab exercises
9OSI-layer walkthroughs
18subnetting drills
100%in-browser, nothing local
The Labs
Interactive virtual IT labs, built for first-timers
Read a little, click a lot. Each lab pairs a short lesson with a sandbox you can prod until the idea sticks.
02
Subnetting Practice
Split a /24 into the blocks a scenario asks for, then prove your answer against the lab checker. Wrong masks get flagged, not punished.
03
Beginner Networking Tutorials
Short written lessons pair with a live sandbox panel. Read a paragraph, try the idea, see the result on a fake topology.
04
Network Discovery Concepts
A safe practice module explains how an ip scanner, a port scanner, and a lan scanner read a network map — all simulated on sample ranges you are allowed to probe.
“I finally saw what an ip scanner actually reports, layer by layer, instead of memorising a definition.”
Lieke Hendriks, Trainee Network Technician, Maasveld CareLesson Path
From OSI model lab to working intuition
Every lab starts with one idea, gives you a sandbox to poke at it, then asks a question you can only answer by trying. The port scanner concept module, for example, shows open and closed responses on a simulated host before any theory lands.
- Step 1: read a two-minute tutorial on one concept.
- Step 2: open the matching interactive virtual IT lab.
- Step 3: finish a mission — subnetting practice or protocol training.
- Step 4: explain it back. If you can teach it, you know it.
Learner Voices
What beginners tell us afterwards
“The subnetting practice was strict in a good way. It told me the mask was wrong and why, not just no.”
Daan Visser, IT Student, Noordkade Technical College
“Browser-based network training meant I could practise on the train. No laptop setup, no excuses.”
Sanne de Wit, Helpdesk Apprentice, Vlinder Retail Group
“The lan scanner lab made the OSI model click. Watching a sweep on a fake subnet beats a slideshow.”
Bram Koster, Junior Support Engineer, Helder Clinics
Plans
Pick the way you want to learn
Self-Paced
Full lab library, subnetting drills, and the OSI model lab on your own schedule.
Contact for pricing
Ask About Self-PacedGuided Track
A structured route through beginner networking tutorials with monthly check-ins.
Contact for pricing
Ask About Guided TrackTeam Training
Shared dashboards and progress notes for apprentices and helpdesk crews.
Contact for pricing
Ask About Team TrainingFAQ
Fair questions before you start
Do I need to set anything up on my computer?
No. Every lab runs in the browser. There is nothing to add to your machine — open the sandbox link and a simulated network loads for you.
Is this suitable for complete beginners?
Yes. The first tracks assume zero networking background. We start at what an IP address even is, then build toward subnetting and protocol flow.
Do you cover certification material?
We prepare you for entry-level networking exams with vendor-neutral lessons. We focus on the skills behind those exams rather than any single provider's badge.
What is the discovery sandbox, exactly?
It is a teaching module where you study how an ip scanner, port scanner, and lan scanner read a network. Everything runs against our simulated ranges — you never probe real or third-party systems.
Can I practise on my phone?
Mostly, yes. Reading and quizzes work well on a phone. For subnetting drills and the OSI model lab, a wider screen honestly helps.
Get Started
Start Free Lab Tour
Tell us where you are starting from — total beginner, brushing up, or training a team. We will send a matching lab path and a sandbox link.