Free CCNA 200-301 study notes, practical labs, command references, subnetting exercises and practice questions — written to make networking understandable rather than just memorisable.
Network devices, cabling, TCP/UDP, IPv4, IPv6, subnetting, wireless, virtualization and switching basics.
VLANs, trunks, EtherChannel, spanning tree, wireless architectures and device management.
Routing tables, static routing, OSPF, first-hop redundancy and forwarding decisions.
NAT, NTP, DHCP, DNS, SNMP, syslog, QoS and remote-access services.
Threats, access control, device hardening, Layer 2 security, VPN concepts and wireless security.
APIs, JSON, automation, controllers, configuration management, AI and network operations.
Work through CIDR, host ranges, wildcard masks and VLSM exercises.
Quick-reference Cisco IOS configuration and verification commands.
Build VLANs, trunks, OSPF, ACLs, NAT and more in Packet Tracer.
Short quizzes designed to test understanding, not just memorisation.
Each topic is designed to move from the idea behind the technology to what it actually looks like on a network.