In this video, day 7 of my free CCNA complete course, you will learn about IPv4 addressing, network prefixes, netmasks (subnet masks), etc. In this FREE and COMPLETE CCNA 200-301 course you will find lecture videos covering all topics in Cisco official exam topics list, end-of-video quizzes to test your knowledge, flashcards to review, and practice labs to get hands-on experience.