4th meeting

4th meeting in our Information security class was about ip address and conversion of binary and ip numbers the conversion of ip address was hard to grasp for me because or maybe i forgot it because binary-decimal lesson is a firstyr college in intro to computer language.but our teacher make a small lesson about binary decimal conversion so i remember it a little.as for our 4th meeting in software engineering subject our lesson is about software models,software developing and their purposes.releasing a software in public must first run beta tests,system requirements of the software in order to run it,including the troubleshoot or help,guide to the software to be able to understand the end user what to do,software features and increement/decreement of phases.