This 'What is...' post comes post phone intro/screen/meet I had earlier today with an edu startup. When asked the following questions, although familiar with general gist, I didn't go too much further in detail. Not sure if this ended up hurting or not, but decided to read up and jot down a bit more info so if ever asked again, perhaps having written this will help.
The gist: HTTPS (Hypertext Transfer Protocol Secure) is secure connection, while HTTP is not.
Differences:
HTTPS transmits data safely and securely. For example: a site that involves transactions would be HTTPS. A quick visual confirmation would be to check out the address bar at the top and look for a padlock.
Ports differ. By default, HTTP uses Port 80 while HTTPS uses Port 443 for communication.
Layers differ. HTTP operated at application layer while HTTPS operated at transport layer.
Sidebar: What is application and transport layer? They are 2 of 7 OSI (Open Systems Interconnection) model layers; conceptual model characterizing communication functionality of telecommunication/ computing system. The layers: Physical, Data Link, Network, Transport, Session, Presentation, Application. https://en.wikipedia.org/wiki/OSI_model
Encryption. HTTP: no encryption. HTTPS: uses encryption.
Certificates: HTTP doesn't require them, HTTPS does.
A positioning property. It specifies where an element should be placed (left/right) of its container; it allows text/ inline elements to wrap around whatever element positioned (the float element). Although the element is removed from the normal flow of the page it still remains as part of the flow unlike with absolute positioning.
Used for responsive design. Used to modify site/app depending on device type or specifics like screen resolution or browser window size.
script tag is used to reference/ embed code such as JavaScript at the end of the file, placed there so html has chance to load before JavaScript is executed.
Using script tag in head is for loading a library of sorts, like jQuery. They are things used to process the page.
A type of version control that keeps track of source code files/changes.
References:
https://www.quora.com/What-is-the-difference-between-HTTP-and-HTTPS
https://css-tricks.com/all-about-floats/ https://developer.mozilla.org/en-US/docs/Web/CSS/float
https://developer.mozilla.org/en-US/docs/Web/CSS/Media_Queries/Using_media_queries https://css-tricks.com/snippets/css/media-queries-for-standard-devices/
https://developer.mozilla.org/en-US/docs/Web/HTML/Element/script https://stackoverflow.com/questions/6303490/whats-the-difference-between-html-head-and-body-tags?noredirect=1&lq=1