Overview
Your complete guide to The network at work
Wi-Fi, network security, troubleshooting tools, the cloud and automation, then a hands-on project building a full office network, and the certificate plan and the lab.
Non-technical and technical learners alike. Every part opens two ways in: a plain path built on an analogy for someone starting from zero, and a detailed path for someone who knows the basics and wants depth.
An animation, then what you need before you start, then the idea with code you run, then a worked example, then review cards and "test your understanding" questions.
Do not leave a part before you can answer its questions without guessing. Reading alone proves nothing.
Pick a topic
A look at The network at work
You apply what you learned to real networks: the air, protection, faults and the cloud, then you build your first project and pick your first certificate.
| Part | Topic | You learn |
|---|---|---|
| 1 | Wi-Fi: the network through the air | Bands and channels, generations up to Wi-Fi 7, joining and WPA3 encryption, enterprise 802.1X, coverage planning |
| 2 | Network security: walls, tunnels and attacks | Confidentiality, integrity and availability, ACLs and firewalls, VPN and IPsec, layer 2 protection, AAA and SSH |
| 3 | Diagnostic tools and troubleshooting | Bottom-up troubleshooting, ping, traceroute, ipconfig, dig and ss, Wireshark and its filters, Cisco show commands |
| 4 | Modern networks: cloud and automation | VPCs and public and private subnets, SDN and the control plane, automation with Python, JSON and Ansible, monitoring with SNMP, Syslog and NetFlow, dual-stack IPv6 |
| 5 | Hands-on project: build a small office network from scratch | Planning before configuring, the addressing table, VLANs and trunks, inter-VLAN routing, DHCP, ACLs, SSH, testing and documentation |
| 6 | The roadmap, certificates and your lab | The two paths and the seven-phase plan, Network+ N10-009 against CCNA 200-301, the 2027 CCNA change, the free lab, specialisations after the basics |
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