IPsec stands for Internet Protocol Security, a set of protocols designed to secure internet communications. It works by encrypting and authenticating data packets sent over a network, ensuring that only authorized users can access the information. This is particularly important for protecting sensitive data, such as financial transactions or personal information, from potential eavesdroppers. IPsec operates at the network layer, which means it can secure any application that uses the internet. It can be used in various scenarios, including Virtual Private Networks (VPNs) and secure site-to-site connections. By implementing IPsec, organizations can enhance their overall cybersecurity and maintain the privacy of their communications.