What is VPN, Difference between IP address and Mac address,how to troubleshoot of VPN and Outlook?

Question

Accepted Answer

VPN is a secure connection to a network over the internet. IP address is a unique identifier for devices on a network, while MAC address is a unique identifier for network interfaces.

VPN allows remote access to a network through a secure connection
IP address is used to identify devices on a network and can be dynamic or static
MAC address is a unique identifier for network interfaces and is assigned by the manufacturer
To troubleshoot VPN, check network connectivity, firewall settings, and VPN client configuration
To troubleshoot Outlook, check email settings, network connectivity, and email server status