Glossary index

Technology, science and the universe

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Software development

X-User Stories

X-User Stories are brief descriptions of features or functionalities of a system from the end user's perspective. Their main goal is to capture the needs and expectations of the user, thus…

Software development

X-User Story

The 'X-User Story' is a fundamental tool in agile development that captures and communicates the needs and expectations of end users of a product. It is a brief narrative that describes a…

Mathematics and statistics

X-Validation

Cross-validation is a statistical technique used to assess the generalization ability of a predictive model. It involves splitting a dataset into multiple subsets, allowing the model to be trained on…

Artificial intelligence

X-Validation Set

Validation Set X is a crucial part of the training process for neural network models. It refers to a subset of data used to evaluate the performance of a model that has been previously trained using…

Data and analytics

X-Value

The X value is the numerical value associated with a data point on the horizontal axis of a graph. In data visualization, the X-axis typically represents an independent variable, which can be time…

Engineering and transportation

X-Value Stream Mapping

X-Value Stream Mapping is a lean management method used to analyze and optimize the flow of materials and information throughout a process. This approach allows organizations to identify…

Mathematics and statistics

X-Variance

Variance is a statistical measure that indicates the dispersion of a dataset relative to its mean. In simple terms, it reflects how much individual values vary in relation to the average of the set…

Artificial intelligence

X-Vector

X-Vector is an innovative approach based on neural networks specifically designed for speaker recognition. Its main feature is the ability to generate fixed-length embeddings from speech segments…

Data and analytics

X-Visualization

X-Visualization refers to the graphical representation of data to more easily identify anomalies. This technique combines data visualization with artificial intelligence algorithms to highlight…

Networking and telecommunications

X.21

X.21 is an international standard that defines a protocol for synchronous data transmission over a digital circuit. This protocol is primarily used in telecommunications networks to establish…

Networking and telecommunications

X.21 Access Protocol

The X.21 Access Protocol is used for synchronous data transmission in telecommunications networks. This protocol, defined by the International Telecommunication Union (ITU), establishes a framework…

Networking and telecommunications

X.21 Data Link Layer

The X.21 Data Link Layer is a standard for synchronous data transmission in telecommunications. This protocol is primarily used in telecommunications networks to establish and manage connections…

Networking and telecommunications

X.21 Interface

The X.21 interface is a communication standard that allows the connection of terminal equipment to public data networks, facilitating data transmission in telecommunications environments. This…

Networking and telecommunications

X.21 Networking

X.21 networks are an international standard for synchronous data communication over digital lines. This protocol, defined by the International Telecommunication Union (ITU), is primarily used in the…

Networking and telecommunications

X.21 Standard

The X.21 standard provides specifications for synchronous data transmission in telecommunications. This standard, developed by the International Telecommunication Union (ITU), focuses on the…

Networking and telecommunications

X.25

X.25 is a standard suite of protocols from the ITU-T (International Telecommunication Union) designed for packet-switched networks. This set of protocols enables data communication between devices…

Networking and telecommunications

X.25 Access Protocol

The X.25 Access Protocol is used for communication in packet-switched networks based on the X.25 standard. This protocol enables efficient and secure data transmission over telecommunications…

Networking and telecommunications

X.25 Call Control

X.25 Call Control refers to the mechanisms used to establish and manage calls over an X.25 network, a data communication protocol that facilitates the transmission of information in packets. This…

Networking and telecommunications

X.25 Connection

An X.25 connection is a logical link established between two endpoints for communication. This packet-switched network protocol is designed for data transmission, allowing communication between…

Networking and telecommunications

X.25 Connectionless

X.25 connectionless allows data transmission without establishing a dedicated connection. This communication protocol is based on a packet-switching model, where data is divided into packets that are…

Networking and telecommunications

X.25 Data Link

The data link layer in X.25 is responsible for the transfer of data from node to node. This layer is responsible for establishing, maintaining, and releasing connections between devices on a network…

Networking and telecommunications

X.25 Data Link Layer

The X.25 data link layer is a fundamental part of the X.25 protocol stack, designed to provide a reliable and efficient means of communication between devices in a network. This layer is responsible…

Networking and telecommunications

X.25 End-to-End

End-to-end in X.25 refers to the complete path from the source to the destination in a communication network. This packet-switching communication protocol was designed to enable efficient and…

Networking and telecommunications

X.25 Frame

A frame in X.25 is a data packet that includes control information for transmission. This communication protocol, designed for packet-switched networks, allows for efficient and reliable data…

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