Smart cities have matured and increased in potential in recent decades. Realistically, the IoT has opened up new opportunities, establishing a collection of important enabling technologies for smart cities and making it feasible to develop and automate certain services and applications for the city's many stakeholders. This study presents a literature analysis on IoT-enabled intelligent cities to highlight the significant trends and unresolved difficulties of integrating IoT technology to construct sustainable and prosperousintelligent cities. The paper provides a review of the essential technologies proposed for IoT framework implementation by analysing the well-known smart city approaches and frameworks by employing a classification that is split into eight domains. It is an expansion over the conventional classification that is used in the majority of similar works