In serverless mode, you don’t need to pay attention to how many worker nodes are working and you don’t need to adjust that number manually. DoubleCloud Transfer will automatically scale up and scale out the mode depending on the amount of data you have at your source. Dedicated mode is when you need extra security and isolation from other customers. Also, in that mode, you can establish VPC peering with other AWS accounts. You will have dedicated virtual machines under the hood for use only for you in that mode.