Learning path
The full journey: learn how networks work first, then everything the CCNA exam covers.
Beginner → Intermediate · 16 courses · 175 lessons
Start with Network Fundamentals →How networks really work, from devices and Ethernet to IP, DNS, NAT, Wi-Fi, packet flow and troubleshooting.
The Cisco command line: modes, first-time setup, saving configs, show commands and CDP/LLDP.
Subnet masks, CIDR, equal subnets and VLSM, with unlimited practice drills.
Addressing Cisco interfaces with IPv6, EUI-64, SLAAC and IPv6 static routes.
Access and trunk ports, 802.1Q tagging, the native VLAN and inter-VLAN routing, plus advanced VLAN topics.
Redundant links, EtherChannel, switching modes, PoE and VTP on Cisco switches.
Loops, the STP algorithm, PVST+, Rapid PVST+ and the guard features, with labs.
RF basics, AP architectures, WLC configuration and WPA2/WPA3 security.
Routing tables, longest match, administrative distance, static and default routes.
Single-area OSPFv2: neighbours, DR/BDR, configuration, verification and troubleshooting.
Keeping the default gateway up with HSRP, VRRP and GLBP.
Static NAT, dynamic NAT and PAT on Cisco routers, with verification and a lab.
NTP, DHCP server and relay, SNMP, Syslog, device management and QoS.
Port security, DHCP snooping, DAI, device access, AAA, ACLs and VPNs.
Virtual machines, containers, virtual switches and VRFs.
Controller-based networking, REST APIs and JSON, Ansible and Terraform, AI in operations.