Final answer:
IPv6 supports IPsec (Internet Protocol Security), which provides end-to-end security by authenticating and encrypting IP packets for secure network connections.
Step-by-step explanation:
IPv6 (Internet Protocol version 6) supports a feature known as IPsec (Internet Protocol Security) which is designed for securely connecting to networks. IPsec is a suite of protocols that provides end-to-end security over the Internet by authenticating and encrypting each IP packet in a data stream. This feature is built directly into the IPv6 protocol, unlike IPv4, where it is optional and requires additional configuration. IPsec supports network-level peer authentication, data integrity, data encryption, and data origin authentication, making IPv6 connections inherently more secure.