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What means HTTP

To begin with: 

HyperText Transport ProtocolThe HyperText Transfer Protocol is an application layer protocol, which means it focuses on how information is presented to the user of the computer but doesn’t care a whit about how data gets from Point A to Point B. It is stateless, which means it doesn’t attempt to remember anything about the previous Web session. This is great because there is less data to send, and that means speed. And HTTP operates on Transmission Control Protocol (TCP) Port 80 by default, meaning your computer must send and receive data through this port to use HTTP. Not just any old port will do.

Ending With HTTPS
Secure HyperText Transfer Protocol (HTTPS) is for all practical purposes HTTP. The chief distinction is that it uses TCP Port 443 by default, so HTTP and HTTPS are two separate communications. HTTPS works in conjunction with another protocol, Secure Sockets Layer (SSL), to transport data safely. Remember, HTTP and HTTPS don’t care how the data gets to its destination. In contrast, SSL doesn’t care what the data looks like. People often use the terms HTTPS and SSL interchangeably, but this isn’t accurate. HTTPS is secure because it uses SSL to move data

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