Cisco
The backbone of enterprise networks
Cisco Systems builds the routers, switches, firewalls and collaboration tools that power most of the world's enterprise networks. Their official documentation, free Networking Academy and certification tracks (CCNA, CCNP, CCIE) are the gold standard for IT careers.
Key topics
- IOS
- Catalyst
- Meraki
- ASA / Firepower
- ISE
- DNA Center
- CCNA
- CCNP
Documentation
- Cisco Support & Documentation — Product configuration guides, command references, release notes.
- Cisco IOS XE Configuration
- Meraki Documentation
Free Training
- Cisco Networking Academy — Free CCNA prep, Packet Tracer, Python.
- Cisco U. (Free Tier) — Tutorials, learning paths, and labs.
- DevNet Learning Labs — Network automation with Python and APIs.