This paper explores the crucial role of wireless networks in facilitating connectivity for smart applications within the Internet of Things (IoT). Objectives include examining wireless network protocols for IoT, addressing security challenges, exploring design considerations, investigating energy efficiency, and analyzing standardization efforts. The study involves an extensive review of literature, research articles, and industry reports. It comprehensively analyzes wireless network protocols in IoT applications, detailing their characteristics. Security challenges are emphasized, advocating robust authentication, encryption, and access control. Design considerations and scalability challenges are explored, with potential solutions discussed. Energy efficiency is investigated, covering power consumption, energy-efficient protocols, and harvesting methods. The study also scrutinizes standardization efforts’ impact on interoperability and IoT adoption. Through these insights, the paper aims to advance the seamless integration of wireless networks and IoT, unlocking the full potential of smart applications in diverse domains.