Description: Heterogeneous networks are those that integrate different types of technologies and devices to facilitate communication and data exchange. These networks can include a variety of components, such as local area networks (LAN), wide area networks (WAN), mobile devices, sensors, and cloud computing systems, among others. The main characteristic of heterogeneous networks is their ability to interconnect different platforms and protocols, allowing for greater flexibility and scalability in network infrastructure. This is especially relevant in a world where the diversity of devices and technologies is constantly growing. Quality of Service (QoS) in heterogeneous networks becomes a crucial aspect, as resources must be managed properly to ensure that critical applications, such as video streaming or real-time communications, operate without interruptions. The implementation of QoS policies allows for prioritizing data traffic, ensuring that users experience optimal performance, regardless of the network’s heterogeneity. In summary, heterogeneous networks are fundamental for the development of modern communication infrastructures, enabling the integration of multiple technologies and ensuring quality service for users.