# Computer network Assignment1 ### Problem 1 1. ![](https://i.imgur.com/BEqg0SU.png) 2. youtube.com, streaming 3. 443 ### Problem 2 1. ![](https://i.imgur.com/lY8PWoO.png) 2. 22 3. - My IP address is 140.112.243.25, which is public. - private ip class - class A 10.0.0.0 – 10.255.255.255 - class B 172.16.0.0 – 172.31.255.255 - class C 192.168.0.0 – 192.168.255.255 ### Problem 3 1. same: Src Port, Dst port 2. diff: Sequence, Window, Urgent pointer ### Problem 4 1. ![](https://i.imgur.com/tvMkurz.png) 2. http://nasahw1.csie.ntu.edu.tw/netflix/ (not available now) 3. http doesn't encrpyt packege ### Problem 5 1. Packeges are encapsulated by many different layer protocal such as application, transport, network, link and physical layer. - \(c\)