CCNA guides
CCNA study guides
Clear explanations of the topics that matter for the CCNA, with examples, diagrams and exercises.
Basic Cisco IOS Commands: CCNA Cheat Sheet
Basic Cisco IOS commands cheat sheet for CCNA: CLI modes, initial setup, passwords and SSH, interfaces, saving the config, show commands and troubleshooting.
Updated: Guide · 13 minIPv6 Addresses Explained: Format, Shortening, Types
IPv6 addresses made simple: the 128-bit format, how to shorten and expand them, address types, EUI-64 step by step, SLAAC vs DHCPv6, and exercises with answers.
Updated: Guide · 12 minOSI Model vs TCP/IP Model Explained (With Examples)
The OSI and TCP/IP models made simple: the 7 layers, PDUs, protocols and devices, encapsulation of a real web request, CCNA exam traps and practice questions.
Updated: Guide · 14 minSubnetting Step by Step: IPv4, CIDR and VLSM Explained
Learn subnetting step by step: subnet masks, CIDR, the magic number method, worked /26, /20 and /30 examples, a VLSM example and exercises with answers.
Updated: Guide · 14 minVLANs and Trunks Explained: 802.1Q, Native VLAN, Inter-VLAN
VLANs and trunks explained: access vs trunk ports, the 802.1Q tag, native VLAN, DTP, inter-VLAN routing, Cisco IOS configuration, troubleshooting and exercises.
Updated: Guide · 12 minWhat Is CCNA and How to Prepare for 200-301 (2026 Guide)
What is CCNA? The 200-301 exam explained: cost, format, validity, 2027 v2.0 changes and a 12-week CCNA study plan, plus study tips and mistakes to avoid.
Updated:Practise in the app
1,900+ CCNA questions, each with an explanation, in English or Romanian.