Software for web servers can perform very different tasks e.g. monitoring the performance of the server. Programs on the intranet can be used exclusively on the internal computer network, while software for the Internet is also installed on public or remote web servers. The abbreviation VPN stands for Virtual Private Network. VPN encrypts the Internet connection and thus prevents "eavesdropping" or "reading" of data transmissions such as e-mails, etc. The type of Internet connection is irrelevant when using VPN. VPN software enables, for example, the secure integration of field staff into the company's internal network.