Learn networking by doing.
Follow a clear path from first principles to real troubleshooting. Learn the concept, check your understanding, then configure a network that proves it.
No credit card required · 3 full labs included
Start here
Choose your own path
Networking Fundamentals
RecommendedStart from nothing and finish able to read a routing table, segment a LAN with VLANs, run DHCP and DNS, and control traffic with NAT and access lists. Every concept is followed by a real network you configure yourself.
9 modules · 51 activities · ~12 hr
Network Services in Depth
IntermediateThe three services every network runs - addressing, naming and translation - past the point where the fundamentals stop. Scopes and options, records and caching, and publishing a service inward rather than just sharing an address outward.
4 modules · 15 activities · ~5 hr
Routing Protocols in Depth
AdvancedPast one static route and one OSPF adjacency, into the protocols as they actually behave - what they exchange, how they choose, and the specific ways each one fails while looking healthy.
9 modules · 41 activities · ~12 hr
Network Security and Access Control
IntermediateFiltering as it is actually practised - by service rather than by host, in the right direction, with state - and the controls around it that no device implements.
6 modules · 21 activities · ~6 hr
For certification learners
Prepare for the CCNA by doing the work
Build practical networking skills through structured lessons, quizzes, and live browser labs that support common Cisco-style commands and automatic grading. No installation, hardware, or user-provided device images are required.
The underlying environment uses FRRouting and Linux with a Cisco-style compatibility layer; it is not Cisco IOS.
Learn → Assess → Practice → Retain
Every step prepares you for the next.
Interactive lessons
Build the idea before you configure anything.
Graded quizzes
Check whether you understand it, not just the vocabulary.
Real network labs
Apply the concept in a realistic virtual network.
Spaced repetition
Bring weak topics back at the right time.
Pricing
* 30-day money-back guarantee. Email contact@subneti.ca within 30 days of the charge for a full refund.
What you'll get out of it
Build skills you can use.
Understand the fundamentals
Build a mental model that makes the commands and diagrams make sense.
Troubleshoot with confidence
Work through realistic network problems and learn why a fix works.
Prepare for certification
Study the topics that show up in real networking work and exams.