Cisco CCNA 200-301 Lessons

Every lesson is free to read, with three practice questions each. Work through them in order, or jump to the objective you need.

  1. Diagnosing interface and cable problems: duplex, speed, errors, collisions and cable typesObjective 1.1
  2. Hypervisors, virtual machines and containers, and what each one doesObjective 1.2
  3. IPv4 addressing and subnetting: masks, prefixes, private ranges and troubleshootingObjective 1.3
  4. IPv6 addressing: unicast types, prefix sizes and modified EUI-64Objective 1.4
  5. Wireless principles: bands and channels, RF, security protocols and interferenceObjective 1.5
  6. Troubleshooting wired and wireless clients on Windows, macOS and LinuxObjective 1.6
  7. DHCPv4 on IOS: client, server and relayObjective 1.7
  8. Connecting switches and routers: L2/L3 interfaces, 802.1Q trunks, LACP EtherChannel and SVIsObjective 2.1
  9. Edge ports: VLANs, PoE, port channels and LACP for hosts, APs, phones and appliancesObjective 2.2
  10. Checking network documentation with CDP and LLDPObjective 2.3
  11. Layer 2 and Layer 3 troubleshooting with show commands, ping, traceroute and capturesObjective 2.4
  12. Rapid PVST+: root bridge, port roles and states, PortFast and the STP guardsObjective 2.5
  13. Reading the routing table: longest match, administrative distance, metric and default routeObjective 3.1
  14. IPv4 and IPv6 static routes: default, network, host and floatingObjective 3.2
  15. Single-area OSPFv2 and OSPFv3: neighbors, network types, DR/BDR and router IDObjective 3.3
  16. First hop redundancy: reading HSRP and VRRP statusObjective 3.4
  17. Device management access: local users, and AAA with TACACS+ and RADIUSObjective 4.1
  18. Moving configurations and images securely with SFTP and SCPObjective 4.2
  19. NAT and PAT on IOS XE routersObjective 4.3
  20. Diagnosing DNS records: A, AAAA, CNAME, MX, NS and PTRObjective 4.4
  21. IPsec VPNs: remote access and site-to-site, protocols and modesObjective 4.5
  22. IPv4 ACLs: standard, extended, numbered and namedObjective 4.6
  23. Layer 2 security: DHCP snooping, DAI, storm control, RA guard and port securityObjective 4.7
  24. Agentic AI in network operationsObjective 5.1
  25. Writing prompts for generative AI in network operationsObjective 5.2
  26. Network management approaches: device, cloud, controller, automation and infrastructure as codeObjective 5.3
  27. What SNMP does in network operationsObjective 5.4
  28. Running commands with configuration management: AnsibleObjective 5.5
  29. Reading syslog messages: content, severity levels and facilitiesObjective 5.6