Curriculum · 27 lessons

The Curriculum

Five levels of hands-on networking, from first principles to subnetting. Lessons link straight into the sandbox tools, and your browser remembers where you left off.

5 levels27 lessons5 quizzes · ~3.5 hours10 interactive tools →

L15 lessons · ~30 min

Basic Concepts

Learn the fundamentals of computer networks, IP addressing, and how devices communicate.

Start level →

01What is a Network?Lesson 02IP AddressSimulation 03MAC AddressLesson 04LAN, WAN and InternetLesson 05Level 1 QuizQuiz

L26 lessons · ~45 min

OSI Model

Explore the 7-layer OSI model, TCP/IP stack, and how data travels through networks.

Start level →

01What is the OSI Model?Lesson 027 Layers DetailedSimulation 03TCP/IP ModelLesson 04Packet JourneySimulation 05EncapsulationLesson 06Level 2 QuizQuiz

L35 lessons · ~40 min

Protocols

Understand key protocols: HTTP/HTTPS, DNS, DHCP, and the TCP vs UDP comparison.

Start level →

01HTTP/HTTPSLesson 02How DNS Works?Simulation 03DHCPLesson 04TCP vs UDPSimulation 05Level 3 QuizQuiz

L45 lessons · ~40 min

Network Devices

Learn about hubs, switches, routers, firewalls, and how to build network topologies.

Start level →

01Hub vs SwitchSimulation 02RouterLesson 03Build Network TopologyInteractive 04FirewallLesson 05Level 4 QuizQuiz

L56 lessons · ~50 min

Advanced Topics

Master subnetting, NAT, VPNs, and essential network terminal commands.

Start level →

01Subnetting BasicsLesson 02Subnet CalculationSimulation 03What is NAT?Lesson 04VPNLesson 05Terminal CommandsTerminal 06Final QuizQuiz

Curriculum · 27 lessons

The Curriculum

Five levels of hands-on networking, from first principles to subnetting. Lessons link straight into the sandbox tools, and your browser remembers where you left off.

5 levels27 lessons5 quizzes · ~3.5 hours10 interactive tools →

L15 lessons · ~30 min