Why do we use external stylesheets instead of inline or embedded styles?
When you have multiple pages using the same CSS
What is the difference between SSH and FTP and why do we use each?
FTP and SSH are both network protocols. SSH uses a public key encryption. SSH is used to log into and execute code on remote hosts, browse the web using encrypted proxy clients, and transfer files. SFTP is always used to transfer files over SSH. FTP transmits all data in plain-text thus reveal crucial and private data, including your user name and password. SFTP as such is included in most popular FTP suites.