Internet of Things (IoT) Practice Exam 2026 – Comprehensive Prep Resource

TCP/IP is commonly used to connect devices in an IoT system because it provides a robust framework for communication over networks. The Transmission Control Protocol (TCP) ensures reliable data transmission by establishing a connection between devices, while the Internet Protocol (IP) facilitates addressing and routing, allowing devices to identify and communicate with each other on a network.

In the context of IoT systems, where numerous devices are interconnected and need to share data seamlessly, TCP/IP is foundational. It supports various higher-level protocols that facilitate different types of communication and data transfer in an interconnected environment, making it an ideal choice for IoT applications.

Other protocols mentioned serve different purposes in the realm of networking. For instance, FTP (File Transfer Protocol) is used for file transfers rather than connecting devices, and HTTP (Hypertext Transfer Protocol) is primarily utilized for web traffic, focusing on the transfer of hypertext documents. SMTP (Simple Mail Transfer Protocol) is designated for sending emails, which does not align with the requirements of device communication in IoT systems. Thus, TCP/IP stands out as the most integral protocol for device connectivity in this context.