# Future Internet Architectures on an Emerging Scale--A Systematic Review
## 1 Introduction
This evolutionary approach to building models promises to meet the requirements that are needed for a future internet that is more secure, private, and efficient. This article aims to present the existing research and the new developments that have been made to scale new internet services without jeopardizing the existing internet, and to provide significant resources. We focus our attention on two current approaches [7], namely evolutionary and clean slate. The evolutionary approach that is discussed in this paper shows how a system is transformed from one state to another incrementally and promises to provide solutions through the inclusion of additional services, without jeopardizing the existing internet. To achieve this, software-defined networking (SDN) and overlay networks (ON) have been presented and discussed extensively, as they are to offer affordable solutions for the future internet. SDN aims to provide an enhanced configuration with an improved performance but observes that this promise is still in its inception. Additionally, there remains varied fundamental issues that are not completely solved, among which, standardization and adoption appear to be imperative. We threw light on the research progress of clean-slate approaches, wherein a solution to a particular problem assumes the varied sections of the architecture to be permanent, thereby targeting different clean-slate solutions. We take a deeper look into the representation networks that form clean slate and build future internet architectures, including the NDN, Mobility First, NEBULA, XIA, and SDN [3]. In the next part of this paper, we introduce the Metaverse as a part of the future internet. It is seen that the Metaverse is gaining a lot of attention and is considered to be the next progress for the future internet, which combines all the emerging areas of augmented reality (AR), virtual reality (VR), mixed reality (MR), and extended reality (XR). The Metaverse is not new and has been explored in science fiction for several decades. However, recent advancements in technology, particularly in AR and VR, have brought the idea of the Metaverse closer to reality. The Metaverse offers a variety of applications, including gaming, social media, education, and e-commerce. In the Metaverse, users can create their virtual avatars, interact with others, and engage in various activities, such as attending virtual events, playing games, or shopping. The Metaverse promises to revolutionize the way that we interact with digital content, and it has the potential to transform several industries. Moreover, blockchain technology is emerging as a potential solution for many of the challenges that are associated with the Metaverse, such as identity verification, secure transactions, and the ownership of virtual assets. Blockchains can provide a decentralized platform for managing digital assets within the Metaverse, which can ensure the transparency, security, and immutability of transactions. In conclusion, the Metaverse is an exciting development that promises to revolutionize the way that we interact with digital content. It is a convergence of various emerging technologies such as AR, VR, MR, and XR. Moreover, the integration of blockchain technology can help to address many of the challenges that are associated with the Metaverse. As research in this area progresses, it is likely that we will see more innovative applications of the Metaverse in various industries. Finally, we highlight certain directions that guide future internet research and its development with the utilization of blockchains, in the context of the Metaverse.