What is vpn, how cashless is useful, how server works

Question

Accepted Answer

VPN is a secure connection between two devices over the internet. Cashless payments eliminate the need for physical currency. Servers store and manage data for networked devices.

VPN stands for Virtual Private Network and is used to securely connect two devices over the internet.
Cashless payments refer to transactions made without the use of physical currency, such as credit cards or mobile payments.
Servers are computers that store and manage data for networked devices, allowing them to access and share information.
Servers work by receiving requests from client devices, processing the requests, and sending back the requested information.
Examples of servers include web servers, email servers, and file servers.