CCNA study guides
Plain-English guides for the topics candidates search for most.
CCNA subnetting explained, step by step
Learn IPv4 subnetting for the CCNA: binary, CIDR, block sizes, host counts and worked examples, plus a free calculator and trainer.
OSPF for the CCNA: single-area OSPFv2
Understand OSPF for the CCNA 200-301: neighbor states, DR/BDR election, router ID, cost, configuration commands and troubleshooting.
VLANs and trunking for the CCNA
How VLANs, access ports, 802.1Q trunks, the native VLAN and router-on-a-stick work for the CCNA, with commands and troubleshooting.
CCNA study plan for beginners (12 weeks)
A realistic 12-week CCNA 200-301 study plan for beginners with weekly goals, free courses, lab advice and exam-day tips.
CCNA vs CCNP: what is the difference?
CCNA vs CCNP explained: level, exam structure, who each certification suits and a sensible order to take them.
Is the CCNA worth it?
Is the Cisco CCNA worth it? Costs, what it proves, who benefits most, limits of the certification and alternatives.