This paper delves into the concept of overlay systems, which create virtual geographies on top of existing network structures, acting as an intermediary layer between end-user applications and network services. Such systems offer significant benefits, including enhanced functionality and improved performance achieved through the implementation of application-specific protocols. The study investigates the advantages provided by overlay systems and proposes novel tools to enhance execution and functionality in networking applications. The paper also explores the Peer-to-Peer (P2P) paradigm, an alternative approach to distributed systems that relies on the resources and services offered by connected endpoint devices. P2P-based distributed systems establish dedicated virtual networks, known as overlay networks, over physical communication mediums, effectively meeting both functional and non-functional requirements. The process of organizing overlay systems presents challenges, especially in satisfying requirements while effectively managing potential conflicts. To address this, the paper adopts a simulative approach, utilizing a tool capable of capturing user behavior and network characteristics, thereby facilitating improved evaluation and performance measurements across various scenarios. Through this investigation, the paper contributes to the understanding and advancement of overlay systems and their application in modern networking environments.

Overlay systems, Network virtualization, Application-specific protocols, Peer-to-Peer (P2P) paradigm, Simulative evaluation