1.DS (DiscoveryService) Discovery Service. A very important link in RFID, DS refers to a series of dynamic information that occurs in each link of the supply chain for querying items. These dynamic information are captured by each link of the supply chain and stored in their respective RFID information services.
2.DS (DigitalSignal, digital signal) is a classification of digital circuits. Technically, DS refers to the rate and format of the signal, and T refers to the equipment that provides the signal. In fact, the usage of "DS" and "T" are synonymous, such as DS1 and T1, DS3 and T3.
3.DS (Directory Service).
Overview of directory service management:
Directory service is one of the most important components in an extended computer system. Although users and managers usually do not know the exact name of the object they are interested in, they may know one or several attributes of the object and can query the catalog to obtain a list of objects that match these attributes.
Directory services can:
Enforce security according to the administrator’s definition to keep information safe and prevent intruders from attacking.
Distribute directories among multiple computers on a network to provide higher performance.
Copy the directory so that more users can use the directory, while effectively preventing failure.
The catalog is divided into multiple data sources (storage areas) to store a large number of objects.
Directory services are both management tools and end-user tools. As the number of objects in the network grows, directory services are becoming more and more important. The directory service is like a central point, and a large distributed directory operates around the center.
In the past, directory services were mainly used to name and locate network resources. These functions have been expanded, and the directory service has become an important component in the Internet/Intranet infrastructure, providing services such as reference directories, white and yellow pages, and e-mail directories.
The directory service also enables the delivery and integration of e-mail between different e-mail systems. The directory service is playing an increasingly important role in application integration. It is like a central repository covering all application, access, and security information.
Many applications launched today have enabled new types of catalogs, which use catalogs as an important part of the network infrastructure. The directory is regarded as a custom database with a special purpose. As long as it is securely connected to this database, users and applications can easily find, read, add, delete, and modify information. This information can then be automatically distributed to other directory servers in the network.
These directory-enabled applications rely on mature directory services to perform three other key roles: authentication and authorization, naming and positioning, and the control and management of network resources.