Everyone is now quite well-known about the usage and existence of internet, and the importance of it is undeniable. So we would like to enhance your knowledge about the server side knowledge which include the usage of http/https/ftp and others. You might be familiar with those term. Some does know and some does not, HTTP which stand for Hypertext Transfer Protocol is actually using port 80 in server side to deliver information to end user, yes it you!. And now you are reading this web blog, you are browsing it through our port 80 server. Which mean, port 80 is usually being use to make any allowable content from server side is available/transparent to users. To thus who familiar with upload process, for sure you will familiar with term such FTP or it long name File Transfer Protocol. For uploading process, port 21 will be “in charge” instead of port 80. Which port 21 allowed file/photo/document or any to be upload to the server so it can be available for port 80 (http) to be display. Other than two port discussed, one of the well use port in more secure web environment is called as port 443 stand for (https – hypertext transfer protocol via SSL/TLS) example of website who use https such Facebook and Gmail. Which this type of secure data transfer is more secure but require server to have certification of it own. But it is not necessarily using port 443, it can be change to other depend on server setting to which port to listen.