This tutorial provides a brief overview of OSI IPv4 addressing mechanism, classes of IP addresses and few important points to remember.
For more practice, try online CCNA practice questions at
https://www.certexams.com/cisco/ccna/questions/ccna_q1.htm (https://www.certexams.com/cisco/ccna/questions/ccna_q1.htm)
An exam simulator for CCNA is available at https://www.certexams.com/cisco/ccna/exam-details.htm (https://www.certexams.com/cisco/ccna/exam-details.htm)