1. learned about what computer is. 
2. detailed information about open system interconnected layers. 
3. learned how text, video, audio etc. this kind of media convert into text and then segment, packet then bit/byte.
4. then bit/byte sends to their destination via connection method. for instance if two devices are connected via cable then it will go as electric signal. then if the connection made with fiber optic cable. data will send as a light way and finally data will be sent as microwave if the connection is made of wireless. 
5. IP address will not change but MAC address does.