The electronics world has a lot of dependency on processing devices in the present and future developments. Even non-electronic industries have much data to process and are indirectly dependent on processors. The larger the number of processors incorporated into the architecture will lower the data handling and processing time; thus, efficiency improves. Hence multi-core processors have become a regular part of the design of processing elements in the electronic industry. The large number of processors incorporated into the system architecture results in difficulty in communicating among them without a deadlock or live-lock. NoC is a promising solution for communicating among the on-chip processors, provided it is fast enough and consumes less energy. Further, to stand with the increasing data acquisition and processing in the new/developing operating systems and software, the latency among the mulit-core processors should be optimal. This paper aims to address energy efficiency and latency reduction methods/techniques for Multi-core architectures.