Why do we use external stylesheets instead of inline or embedded styles?
Full control of page structure according to W3C standards, shorter load time, and reduced file size. Inline or embedded has potential to overwrite something unintentionally.
What is the difference between SSH and FTP and why do we use each?
FTP: file transfer protocol, inherently unsecure, and only controls files. SSH: network protocol, inherently secure, allows a wide variety of applications