Network fundamentals, subnetting, and networking practice platforms.
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- Cisco Packet Tracer Free
- Free network simulation tool from Cisco for practicing routing, switching, and network configuration.
- CTF Academy - Network Forensics Free
- Free network forensics challenges teaching protocol analysis and Wireshark packet inspection skills.
- Inventive HQ Firewall Rule Simulator Free
- Interactive browser-based firewall rule simulator to build, test, and analyze firewall rulesets.
- Kurose/Ross Wireshark Labs Free
- Free hands-on Wireshark labs covering HTTP, DNS, TCP, UDP, IP, NAT, DHCP, and more protocols.
- Malware Traffic Analysis Free
- Free PCAP-based traffic analysis exercises for learning network forensics and packet inspection.
- NetworkDirection Labs Free
- Free pre-built network labs for Cisco CML and VIRL covering routing, switching, and security topics.
- Cybrary Freemium
- Free virtual network labs covering segmentation, routing, and infrastructure skills with guided exercises.
- NetPilot Freemium
- Browser-based multi-vendor network simulator with real Cisco, Juniper, Arista, and Nokia CLIs.