Answer:
The Silk Road was used by several groups and nations to take advantage of the constant and varied commercial exchange that used the route since the Antique Era. Such different nations like Romans, Hungarians, Armenians, Seleucids and Chinese used the Road to exchange the silk cloth produced in China for the Roman gold.
Nations like the Medes used their strategic position in the middle of the Silk Road to itermediate and offer differnt services like guides, translators and slaves. Source: "Strabo's Geography Book II Chapter 5 "
Taxila people in present Pakistan also took advantage of their strategic location to acquire resources by trading and exchanging. When the Islamic monopoly fell, its place was replace by the Mongol Empire. Source: The Pax Mongolica, de Daniel C. Waugh, University of Washington, Seattle.
Explanation: