Final answer:
The synthetic virtual network adapter is called the legacy adapter because it is a newer technology that offers better performance compared to the emulated adapter which emulates an older network interface card.
Step-by-step explanation:
The synthetic virtual network adapter is called the legacy adapter, not the emulated one. This is because the synthetic adapter is a newer technology that was introduced with Hyper-V in Windows Server 2008. The legacy adapter, on the other hand, is an older technology that emulates an older network interface card (NIC).
One reason the synthetic adapter is called the legacy adapter is because it can provide better performance and lower overhead compared to the emulated adapter. The synthetic adapter is designed to take advantage of the host operating system's virtualization capabilities, while the emulated adapter relies on software emulation which can introduce additional latency and CPU usage.
To summarize, the synthetic virtual network adapter is called the legacy adapter because it is a newer technology that offers better performance compared to the emulated adapter which emulates an older network interface card.