What are PORTS?
For the purpose of providing services to unknown callers, a service contact port is its contact port. The contact port is sometimes called the defined. This list specifies the port used by the server process as "well-known port". The port numbers are divided into three ranges: the Well Known Ports, the Registered Ports, and the Dynamic and/or Private Ports. The Well Known Ports are those from 0 through 1023. Here we are discussing about Port Number 443.
https 443/tcp http protocol over TLS/SSL
https 443/udp http protocol over TLS/SSL
# Kipp E.B. Hickman
https 443/sctp HTTPS
# IETF TSVWG
# Randall Stewart
# [RFC4960]
Basically, Port 80 is in use for HTTP and Port 21 for FTP. On the basis of the security of web protocols used by HTTP, we need HTTPS which provides security of services to web server.
Ports are a vulnerable part of any network by which anyone can get the service details of your website running server. The server will make the connection to either port and send back the website information, which your computer will receive on the same port.
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| Secured with HTTPS |
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| Unsecured on HTTP |
You’ve even noticed "https://" rather than "http://" at the beginning of a website URL? In both instances, you’ve connected to a website using the secure HTTPS protocol instead of HTTP.
HTTPS establishes an encrypted connection with a web server, rather than the unencrypted HTTP one. Since HTTP and HTTPS are two different protocols, they use two different ports. HTTP is available on port 80, and HTTPS is on port 443. Whenever you connect to a website beginning with "https://" or you see the lock icon, you’re connecting to that web server over port 443.
You can the list of Port used in a different manner for the network.
On the given link port-list
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