Browser-based network lab simulator
Stop studying. Start working.
PaRoNetSim drops you into scenario-based tickets with a simulated IOS-style CLI. Every command runs against device state in the simulator — not by string matching your typing. 20 fully interactive labs today, 110-lab NorthPeak roadmap, and on-call incident scenarios.
SW-CORE-01> enable
SW-CORE-01# show interfaces trunk
Port Vlans allowed on trunk
Gi0/24 1,10,30
SW-CORE-01# configure terminal
SW-CORE-01(config)# interface Gi0/24
SW-CORE-01(config-if)# switchport trunk allowed vlan add 20
SW-CORE-01(config-if)# end
SW-CORE-01# show interfaces trunk
Port Vlans allowed on trunk
Gi0/24 1,10,20,30
✓ Task 3 complete — VLAN 20 now traversing the uplinkReal-Life Scenarios
On-call incidents, not worksheets.
Open-ended outage tickets with SLA pressure, multi-device topologies, and after-action debriefs that compare your path to a senior engineer's — without spoiling the answer upfront.
Open the ticket queueDMZ web server unreachable from internet
Hi NetOps — customers say the shop site is down. The web team swears nothing changed on the server.
FW-ASA# packet-tracer input outside tcp 203.0.113.10 1234 198.51.100.20 80 Phase: 4 Subtype: deny Result: DROP Drop-reason: (acl) Drop-reason: ACL
1. Pick a ticket
Real complaints from a fictional company. Priority, reporter, business impact — like day one on the job.
2. Work the CLI
Simulated IOS-like prompts, abbreviations, '?' help, and stateful config. Show commands re-render from the device's actual state.
3. Get it right
Validation runs on the device state, not your typing. Multiple valid paths all pass. Hints when you're stuck.
Pricing
Start free. Upgrade when you're ready.