Overview of Internet of Things (IoT), Edge Computing, and Network Topologies
This article explains the fundamentals of the Internet of Things, its four‑layer architecture, the role of edge computing in reducing latency and enhancing privacy, and the characteristics of common network topologies such as star, ring, bus, and mesh, while also noting key industry milestones.
Internet of Things (IoT) is a key component of the new generation of information technology, representing the third wave of the information industry after computers and the Internet.
IoT connects physical objects to the Internet through sensors, RFID, GPS, and other devices, enabling intelligent identification, positioning, tracking, monitoring, and management.
The IoT architecture is divided into four layers: the perception layer (sensing and identification), the network construction layer (connectivity via existing networks), the platform management layer (data storage, retrieval, analysis, security), and the application layer (user‑facing services such as smart grid, smart transport, and logistics).
Edge computing brings compute, storage, control, and application functions close to the terminal, reducing latency, improving reliability, lowering cost, and protecting privacy by offloading tasks from central data centers.
Typical network topologies used in IoT and edge networks include star, ring, bus, and mesh structures, each with distinct advantages and drawbacks regarding simplicity, cost, reliability, scalability, and fault tolerance.
Key historical events mentioned include the standardization of NB‑IoT (started 2015, core frozen 2016) and SoftBank’s acquisition of ARM in 2016.
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