Final answer:
Ironworking technology was likely disseminated throughout sub-Saharan Africa through trade networks and cultural diffusion. The migrating Bantu-speaking peoples also played a significant role in spreading ironworking technology.
Step-by-step explanation:
The likely dissemination of ironworking technology throughout sub-Saharan Africa was through trade networks and cultural diffusion. While there is evidence of iron smelting in Central Africa around 1000 BCE, it is believed to have spread west to the Niger River area and further through cultural exchange and trade. The migrating Bantu-speaking peoples also played a significant role in spreading ironworking technology as they used iron tools to aid in their expansion across Africa.