UK supports Netscape. Graphical browsers are supplemented by helper applications for playing audio or video, displaying word-processor files, etc. The file is loaded into the memory on your machine. The server then breaks the connection with your machine. Your browser then displays the file.
Protocols are access methods.
If a port number is required, it follows the machine name and is separated by a colon. This is the route followed from the point of entry through hierarchically arranged subdirectories or folders to get to the needed file. Usually the file name for an URL ends with an .html or .htm extension. Tags mark up your document. Tags are not case sensitive.