Signaling in 5G networks refers to the exchange of information and communication between different entities in the network to manage services, handle connections, and enable communication between users and the network. In the context of 5G networks, signaling enables entities to communicate with each other through various messages and protocols. The signaling architecture of the 5G network has played a crucial role in enabling the high speeds, greater capacity, reliability, and low latency that are characteristic of 5G networks. The NR protocol stack is located within the 5G network and consists of different layers that work together to enable data transmission and communication in the network. Through protocols such as Diameter and SIP (Session Initiation Protocol), device registration, user authentication, and network resource management have been facilitated. Compared to previous generations, 5G networks have provided numerous improvements in terms of speed, capacity, and reliability. However, they have also introduced new challenges related to complexity, security, energy consumption, and interoperability. As 5G continues to evolve and mature, further advancements in signaling technology will be necessary to address these challenges and ensure the seamless operation of the network. Efforts in standardization, research, and development will be crucial in overcoming these obstacles and maximizing the potential of 5G networks to deliver enhanced connectivity and transformative services.