RFID (Radio-Frequency Identification) technology served as a precursor to the modern IoT. RFID allows objects to be identified and tracked using radio waves. It was one of the early technologies that demonstrated the concept of interconnected devices communicating over a network, which is a fundamental aspect of the IoT.

As the number of IoT devices grows, ensuring data integrity and quick retrieval is crucial. Security measures become critical to protect the data from various threats and vulnerabilities.

Advanced visualization tools in IoT are crucial for gaining insights from complex data. With the enormous volume of data generated by IoT devices, visualizations help in presenting the data in a comprehensible manner. This is vital for analyzing trends, anomalies, and making informed decisions in IoT applications.

Blockchain enhances IoT security through data immutability. Blockchain's distributed ledger ensures that once data is recorded, it cannot be altered, making it ideal for securing the integrity of IoT data, such as sensor readings and device logs.

Devices connected via the Thread wireless protocol are known for their ability to create self-healing mesh networks and connect directly with one another. Thread allows devices to communicate in a decentralized manner, eliminating the need for a central hub or router.

Requiring unique digital certificates for each device emphasizes Identity and Authentication. It ensures that each device is who it claims to be, adding a layer of security to prevent unauthorized access or data breaches.

The Constrained Application Protocol (CoAP) is specifically designed for IoT scenarios where resources, code footprint, and bandwidth are limited. It's a lightweight protocol that enables efficient communication between IoT devices and applications. CoAP is designed for constrained networks and devices.

The process by which an IoT device proves its identity is known as authentication. Authentication is essential to establish trust and verify the identity of devices in an IoT network. Encryption, DDoS, and IP Address are not methods of identity verification but serve other purposes in IoT.

Data deduplication in IoT data storage is critical for reducing storage costs. IoT generates vast amounts of data, and much of it can be redundant. Deduplication identifies and eliminates duplicate data, conserving storage space and reducing operational expenses.

The delegation of access rights to various users in an IoT system exemplifies access control. This ensures that users have appropriate permissions to interact with devices or data. Device authentication is related but distinct, and data encryption and secure boot are different security aspects.