One Important Advantage of Using DS-Lite

C.

DS-Lite, which stands for Dual-Stack Lite, is a technology used to provide IPv6 connectivity to customers by tunneling IPv6 packets over an IPv4 network. The primary advantage of using DS-Lite is to enable service providers to deploy IPv6 in a lightweight and secure manner without requiring significant upgrades to the existing IPv4 infrastructure.

Answer A is correct as it highlights the key advantage of using DS-Lite. With DS-Lite, service providers can assign IPv6 addresses to their customers without requiring additional IPv4 address space, which is becoming scarce. DS-Lite utilizes a tunneling mechanism that encapsulates IPv6 packets within IPv4 packets, and then these packets are sent through the service provider's IPv4 network to reach the destination. DS-Lite supports a stateless mode that enables providers to deploy IPv6 in a highly scalable manner.

Answer B is incorrect. While DS-Lite automates the address-family translation of IPv6 traffic over IPv4 networks, it does not eliminate the need for manual mapping between IPv4 and IPv6 prefixes.

Answer C is incorrect. While DS-Lite can relocate the centralized NAT functionality from the AFTR to the B4 to reduce the amount of state information that requires to be kept on the AFTR, it is not its primary advantage.

Answer D is incorrect. DS-Lite does not automate the tunneling of IPv4 traffic over an IPv6 network. Instead, it tunnels IPv6 packets over an IPv4 network to enable IPv6 connectivity.

In summary, the primary advantage of using DS-Lite is its ability to provide IPv6 connectivity to customers without significant upgrades to the existing IPv4 infrastructure.