Why do we use external stylesheets instead of inline or embedded styles?
External style sheets allow the designer/coder to present a uniform look to a set of web pages. External style sheets allow the coder to place the styling information in one place. It also eliminates the need for redundant code, and it allows for changes to be made to the full set of pages by making changes one css file.
What is the difference between SSH and FTP and why do we use each?
FTP allows you to transfer files from one computer to your directories on a remote computer. The files reside there until called by another program.
SSH allows you to both transfer files and alsoto connect to a computer and use it (within account privileges) to run programs and access files.