Final answer:
The tunneling protocol that emulates an IPv6 link using an IPv4 network for Windows workstation operating systems is Teredo.
Step-by-step explanation:
The tunneling protocol that emulates an IPv6 link using an IPv4 network for Windows workstation operating systems is Teredo. Teredo is an automatic tunneling protocol that allows IPv6 packets to be transmitted over an IPv4 network. It is primarily used in scenarios where native IPv6 is not available, such as in Windows operating systems.
Teredo encapsulates IPv6 packets in IPv4 packets, enabling communication between IPv6-enabled devices over IPv4 networks. It uses UDP port 3544 for communication and assigns an IPv6 address to each device. Teredo also includes a mechanism for NAT traversal, allowing devices behind NAT routers to establish IPv6 connectivity.
Other tunneling protocols that can be used to emulate IPv6 over IPv4 include 6to4 and ISATAP. These protocols provide similar functionality but are designed for different network scenarios.