Online network simulator

Network labs.
Zero hardware.

Build topologies. Practice network CLI. Learn by doing in a network simulator that runs right in your browser.

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7 days free No credit card Nothing to install

Getting started / network labEXAMPLE

192.168.10.0 / 24

R1 · Edge router

R1# show ip interface brief

Interface        IP-Address     Status  Protocol
GigabitEthernet0/0 192.168.10.1   up      up
GigabitEthernet0/1 10.0.0.1       up      up

Select a device to explore sample CLI output.

YOUR NEXT CHAPTER STARTS WITH PRACTICE

network CLIGuided learningNetworks & IoT

Your lab goes with you

Open a browser and get to work. No rack space, VM setup, or hardware to carry.

Make the connections

Turn a network diagram into a working topology. Add devices and connect your ideas.

Learn at the command line

Practice network commands and investigate how your configuration changes the network.

THE WORKSPACE

Less setup.
More discovery.

A place to turn networking theory into practical skills. Build, configure, and troubleshoot from one connected workspace.

See the network you’re building.

Connect routers, switches, and hosts on a visual canvas. Open a device and make your configuration count.

Explore Pro features

Example network topology with an edge router, two switches, and connected hosts

Topology example · built for practice

Get fluent in network CLI.

Move past memorizing commands. Configure interfaces, check routing, and see what happens next.

Router(config)# interface g0/0
Router(config-if)# no shutdown

Make mistakes here.
Build confidence everywhere.

Investigate a broken connection. Challenge an assumption. Practice your troubleshooting process in a simulated environment.

ConfigureInspectUnderstand

A PATH THROUGH THE PRACTICE

Discover. Learn. Prove it.

Start with a scenario, build understanding step by step, and find out what you can do on your own.

01 / DISCOVER

Marketplace

Find a lab with a purpose. Browse network scenarios and course content, then bring a published lab into your workspace.

Explore Marketplace

02 / PRACTICE

Tutorials

Turn a concept into a working configuration. Follow guided tasks, verify supported checkpoints, and see your progress.

Explore tutorials

03 / ASSESS

Examinations

Put your lab skills to the test. Final assessments check your work and highlight the course topics to revisit.

How examinations work

Content and assessments become available as they are published. Access depends on the selected pack and your plan.

IoT SIMULATION

Small sensors.
A whole connected world.

Connect simulated sensors, MQTT brokers, and subscribers. Follow telemetry across your topology and explore how connected devices communicate.

Sensors & actuatorsMQTTVisible telemetry

Explore IoT simulations

IoT features require an eligible Enterprise plan.

MQTT / PUBLISH–SUBSCRIBEEXAMPLE

SensorPublish

BrokerRoute a topic

SubscriberReceive

lab/room/temperature22.4 °C

Example message flow. Watch sensor publishes and subscriber deliveries on your lab topology.

FROM IDEA TO INTERFACE

Your first lab starts here.

Let’s get started

Make yourself at home

Create an account and start your free 7-day trial. No credit card required.

Build your topology

Place your devices on the canvas and connect them to bring your lab idea to life.

Open the CLI. Get curious.

Configure, inspect, and troubleshoot. Connect what you’ve learned to what the network does.

FIELD NOTES

A little perspective.
A lot to explore.

All resources

PERSPECTIVES 7 min read

THE NEXT MOVE IS YOURS

Learn it. Build it.
Make it click.

Your next networking breakthrough starts with a little hands-on practice.

Build your first lab 7-day free trial · No credit card requiredHave questions? Talk to us

Network labs.Zero hardware.