The "box" model is used in CSS to style your content. The box wraps around each piece of content you add to the page.
Content - The content of the box, where text and images appear
Padding - Clears an area around the content. The padding is transparent
Border - A border that goes around the padding and content
Margin - Clears an area outside the border. The margin is transparent
The DNS server translates an IP address into website address such as nike.com. We use DNS because it's much easier to remember words than strings of numbers. Imagine if every time you wanted to see Nike shoes you had to type 143.204.148.65 into your address bar instead of nike.com!