I have been conducting research in different areas of computer networking: Peer-to-Peer (P2P), network coding, multimedia systems and streaming, video coding, cloud computing, online social network, network security, and software defined networking (SDN), IoT, and mixed reality. I lead my research team to study various performance issues in the aforementioned networking systems. We propose algorithms, protocols and innovative uses of theoretical concepts to improve the performance. The goal is to improve the Quality-of-Service (QoS) and performance of Internet services. Currently, my research team focuses on coding-aware multimedia networking, optimization for service deployment and resource allocation in cloud computing, scaling big-data processing systems, and mixed reality. Below is a summary of my scholarly research achievements.