Abstract
Cloud networks are kept evaluating and evolving in recent times due to their performance and efficiency, deployment critics, and costs. Recent progress has been quested for more efficiency and high scalability of cloud networks. The improvement over geographic distribution of cloud facilities in performance and resilience has already been supported and produced in the cloud network overlay protocols and advanced IaaS services, which are more reliable and high-performance. This paper gives an overview of cloud networks and distributed services as well as a summary of some cloud network overlay protocols and datacenter distribution features, such as virtual network segmentation, incremental deployment, multipath and load balancing, and multicast.