Free tools
Free CCNA tools
Free calculators and converters for the CCNA, right in your browser, with the working shown.
IPv4 subnet calculator
Network address, broadcast, first and last usable host and the number of hosts, with the working shown.
Open the tool →Binary / decimal / hex converter
An octet, an IPv4 address or a 32-bit number in all three bases, with the working shown.
Open the tool →IPv6 tool: compress, type, EUI-64
The shortest and the full form of an IPv6 address, its type and prefix, and the EUI-64 interface ID, rule by rule.
Open the tool →You can also practise all of these in the app's trainer, with endless generated exercises.
Practise in the app
1,900+ CCNA questions, each with an explanation, in English or Romanian.