1.      To reference a style sheet across multiple HTML pages, how would you define your CSS?​

If you want to make a footer that attaches to the bottom of the user's window and not just the bottom of the page, what two properties would you use? Q . The shorthand property sets all the border properties in one declaration.

Explanation:

Backdoor

Explanation:

Backdoors are a method of covertly allows a users that are either authorized or unauthorized to bypass the measures put in place for security and obtain access to a network, computer system, embedded system or software, at a high level known as root access level

The uses of backdoors includes computer remote access security (access to remotely obtain passwords or delete hard drive data), and having access to a cryptographic system stored plain texts