Web Servers IIS & Apache

                                          Apache                        IIS( Internet Information Services)

HTTP And HTTPS Protocol

HTTP	HTTPS
HTTP stands for Hypertext Transfer Protocol.	Hypertext Transfer Protocol Secure
Hypertext Transfer (or Transport) Protocol, the data transfer protocol used on the World Wide Web.	Hypertext Transfer Protocol Secure (HTTPS) is a communications protocol for secure communication over a computer network.
HTTP uses port 80 for communication	HTTPS uses port 443 for communication.
HTTP operates at Application Layer	HTTPS operates at Transport Layer.
No encryption is there in HTTP	while HTTPS uses encryption.
No certificates required in HTTP	while certificates required in HTTPS.
HTTP is defined in RFC 2616	HTTPS is defined in RFC 2817
HTTP transmits normal data	HTTPS transmits closed or encrypted data.
Data is not secure to transfer	Data is secure to transfer.
It defines http:// This means that the website is talking to your browser using the regular 'unsecure' language.	It defines https:// this means that the website is talking to your browser using the regular secure language.