Final answer:
IPsec is a set of protocols developed by the Internet Engineering Task Force (IETF) to secure the exchange of data packets at the IP layer.
Step-by-step explanation:
IPsec is a set of protocols developed by the Internet Engineering Task Force (IETF) to support the secure exchange of data packets at the IP layer. It provides authentication, integrity, and confidentiality for IP packets, ensuring that they are protected from unauthorized access or modification during transit. IPsec is widely used to establish secure Virtual Private Network (VPN) connections and to secure communication between network devices.