Port 443 is a virtual point through which data transmissions are sent and received. It is used by transport layer protocols, like the Transmission Control Protocol (TCP), to establish a secure connection between a client browser and a server. Port 443 is the default port for HTTPS traffic, which is used for the transmission of secured traffic, creating a secure communication channel between the client browser and the server it wants to connect to. This channel secures the sensitive data that you provide when you pay for goods or services online, such as your login credentials, credit card information, or bank account number. HTTPS over port 443 is commonly used by online businesses and financial services that aim to protect users from data breaches and secure their sensitive information.

In addition, port 443 is also used as a virtual port that computers use to divert network traffic. It is an important cog in the disaster recovery plan, ensuring businesses remain uninterrupted no matter what the situation. Port 443 is globally used for HTTPS service that provides data authentication and encryption. The HTTPS traffic gets encrypted by using cryptographic algorithms called SSL/TLS.

In summary, port 443 is a virtual point through which data transmissions are sent and received, used by transport layer protocols to establish a secure connection between a client browser and a server. It is the default port for HTTPS traffic, which is used for the transmission of secured traffic, creating a secure communication channel between the client browser and the server it wants to connect to. Port 443 is also used as a virtual port that computers use to divert network traffic and is globally used for HTTPS service that provides data authentication and encryption.