Design your own lab
Drag routers, firewalls and switches onto a canvas, cable them and watch traffic flow through the internet cloud.
Build a labYou are previewing Networking Labs on nwkings.com. The lab website opens only when you choose to. Open Networking Labs
Interactive IT Simulation & Practice Labs
CONFIG by Network Kings
Configure real-feeling routers, switches and firewalls on NK-OS, watch every packet on the wire, and prove it with live task checks. CCNA, CCNP, Juniper, Fortinet and Palo Alto tracks — nothing to install.
NK# Become a CLI King with Network Kings.
Anyone can click through a GUI. Engineers who own the CLI get hired.
- Hands-on labs
- 1201+
- Certification tracks
- 50
No credit card needed · first module of every path + 3 labs, free
Router
Switch
Firewall
Server
ISP
Wi-Fi AP
PC
NK-OS lab
At the console
Think through the network. Then make it work.
Build a branch network, configure its devices and follow the traffic. Use the console and packet capture together to understand why a connection works, or why it fails.
Configure the devices
Work with interfaces, VLANs, routes and firewall policies.
Inspect the packets
Read the headers and prove what happens on the wire.
More than labs: practise like you work
Design a network, plan your path, work real tickets and get a resume that matches the jobs.
- 1CCNA
- 2ENCOR
- 3ENARSI
- 4SPCOR
- 5Automation
Goal: Network Engineer, 9 months0%
A roadmap built for you
Tell us your goal and see the tracks, in order, that get you to the role.
Plan my roadmapINC0010432 · P2New
Branch users cannot reach the internet
SLA28 min left
- show ip route on R1
- Found: missing NAT overload
- ip nat inside source list 1 interface Gi0/1 overload
+120 XP
Work real NOC tickets
Take a ticket, find the root cause on the devices, fix it before the SLA runs out and earn XP.
Take a ticket38ATS score
Keywords from the job post
OSPFBGPVLANNATFortiGatePython
A resume that gets shortlisted
Upload your resume, see its ATS score and add the keywords that jobs ask for.
Check my resumeChoose your track
Every module has reading, console labs, a quiz and scenario questions.
CCNACisco200-301FoundationCCNA
200-30132 modules · 179 hands-on labsOpen track
JNCIA-JunosJuniperJN0-106Juniper · AssociateJNCIA-Junos
JN0-10611 modules · 28 hands-on labsOpen track
Fortinet NSE 4FortinetFortiOS Administrator 7.6Fortinet · FirewallFortinet NSE 4
FortiOS Administrator 7.615 modules · 25 hands-on labsOpen track
Labs
Browse all labsHands-on network labs in your browser
Every lab runs in your browser — no installs, no GNS3, no packet tracer. Type IOS commands, watch the wire, get checked.
Packet Studio
See inside every packet
A Wireshark-style capture of real frames: Ethernet, ARP, IPv4, ICMP, TCP, UDP, DNS, DHCP and OSPF. Click any field to see its bits, its bytes and what it does.
Open Packet Studio110.0.12.1224.0.0.5OSPFHello Packet
2192.168.10.108.8.8.8DNSStandard query A nwkings.com
3192.168.10.10203.0.113.80TCP50122 → 80 [SYN] Seq=0
4203.0.113.80192.168.10.10TCP80 → 50122 [SYN, ACK] Seq=0 Ack=1
510.0.12.14.4.4.4ICMPEcho (ping) request ttl=255
64.4.4.410.0.12.1ICMPEcho (ping) reply ttl=253
Checksums, lengths and flags are computed exactly like on a real wire.
How a lab works
Configure
Type IOS-style commands on NK-OS routers. ? help, Tab completion and short forms work.
Watch the wire
Links turn green when OSPF goes FULL. Capture any link and read the packets.
Get checked
Tasks tick themselves when the network really works, not when you type a keyword.
Plans for learners, teams and lifetime learners
Start with the free trial. Upgrade when you are ready, or pay once and learn for life.
- Individual
One course or every track. 1 month, 6 months or 1 year.
- Team
Seats for your employees, with a dashboard of how each one is doing.
- Lifetime
Pay once from ₹79,999. All future updates included.
CONFIG by Network Kings is an educational IT simulation platform for learning purposes only. It is not Cisco IOS, Junos, FortiOS or PAN-OS and contains no Cisco, Juniper, Fortinet or Palo Alto Networks software. All product names are trademarks of their respective owners.