Internet of Things (IoT) Practice Exam

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What is the primary protocol used for the Internet?

TCP/IP
ZigBee
Wi-Fi
Bluetooth

The correct answer is: TCP/IP

The primary protocol used for the Internet is TCP/IP. This stands for Transmission Control Protocol/Internet Protocol and serves as the foundational communication protocol suite for the Internet. It enables devices to connect and communicate over networks, ensuring that data sent from one device can be received and interpreted by another, regardless of their underlying hardware or operating systems. TCP/IP consists of multiple layers—primarily the Transmission Control Protocol, which ensures reliable transmission of data packets, and the Internet Protocol, which deals with addressing and routing the packets across network boundaries. This layered approach is crucial for the flexibility, interoperability, and scalability that characterize the modern Internet. In contrast, ZigBee, Wi-Fi, and Bluetooth address specific communication technologies. ZigBee is primarily used for low-power, low-data-rate applications in personal area networks. Wi-Fi is a local area networking technology designed to facilitate wireless Internet access but operates on top of the TCP/IP stack. Bluetooth is intended for short-range wireless communication between devices but is not designed for use as a protocol for Internet communications. Therefore, TCP/IP's role as the primary protocol for the Internet is central to its operation and functionality.