Define "network traffic shaping":

Network traffic shaping is a technology by Cisco, for limiting bandiwidth rate of a host

Network traffic shaping is a technology developed by VMware that allows to limit virtual machine's traffic usage.

Network traffic shaping is a mechanism for controlling a virtual machine's network bandwidth

Network traffic shaping is a mechanism for crafting traffic by means of routing and firewall rules

Answer:
Network traffic shaping is a mechanism for controlling a virtual machine's network bandwidth

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