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network layer
packet: where routers operate at. ip address. tcp/ip protocol. provides connections between hosts on different networks.
layer 3 of the osi model, it is primarily concerned with forwarding data based on logical addresses. ip addresses and routers are examples.
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network layer
passes datagrams across a network using ip protocol to find the best path across an entire network. (like the postal service) has numerous router protocols.
routes packets from one network to another, navigating networks following a path of least traffic.
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network layer
path determination and ip (logical addressing) -uses network addresses (ip address) -routers operate at this layer -sends traffic based on ip address
third layer in the tcp/ip stack. routers and other hardware operate on this layer. determining the path that packets will take using ip addresses.
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network layer
path determination and ip (logical addressing) -uses network addresses (ip address) -routers operate at this layer -sends traffic based on ip address
layer 3 of the osi model, it is primarily concerned with forwarding data based on logical addresses. ip addresses and routers are examples.
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relational data model
two-dimensional table representation of data, each row represents a unique record or entity, each column a field where record attributes are stored
a table representation of data; attributes (columns) and records (rows)
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relational data model
the relational model uses a collection of tables to represent both data and the relationships among those data -columns = properties -rows = instances
- object types are represented as sets, known as relations - each relation consists of instances which are called tuples - usual way to represent relations is in tables
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relational data model
two-dimensional table representation of data, each row represents a unique record or entity, each column a field where record attributes are stored
two-dimensional table where each row represents a record and each column represents a field containing attributes
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relational data model
collection of relations (tables), each containing tuples (rows) and attributes (columns)
tuple = row attribute = column relation = table
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relational data model
most commonly used in contemporary database applications
-collection of concepts used to describe the data in an enterprise, from the database administrators' point-of-view -logical db design step
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relational data model
the relational model uses a collection of tables to represent both data and the relationships among those data -columns = properties -rows = instances
represents everything in the database as being stored in the form of tables called relations
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relational data model
data and relationships are represented as tables
this uses a collection of tables to represent both data and the relationships among those data.
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capacity planning
involves the construction of new factories, moving production from one location to another, or buying another company and integrating into your supply chain; multi-year effort
long-term view of capacity management. involves the construction of new factories, moving production from one location to another, or buying another company and integrating into your supply chain.
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capacity planning
1) economies (good when company grows) and diseconomies (bad when company grows) of scale 2) capacity timing and sizing strategies 3) systematic approach to capacity decisions
-(dis)economies of scale -capacity timing and sizing strategies -systematic approach to capacity decisions
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capacity planning
-estimating the size and type of the standard and advanced network circuits for each type of network
estimating size and type of network circuits for each network type
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capacity planning
concerned with determining the level of human and other resources that will be necessary to meet the production targets of the organisation.
o the process of determining the production capacity needed by an organization to meet changing demands.
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program execution
controlled by two special-purpose registers
double click an icon or single click in some cases
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program execution
depend on 1. program arguments 2. environment variables 3. dynamic libraries 4. other programs and the operating system
the process of a system loading a program into memory to run.
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theoretical model
describe the way variables of interest are interconnected. usually represented by a diagram or flowchart.
used interchangeably with symbolic model
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theoretical model
highly established set of concepts that are testable; a ready made map for the study
describe the way variables of interest are interconnected. usually represented by a diagram or flowchart.
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traffic analysis
the attempt to gather information about somebody's internet connections by analyzing the timing, length, and destinations of their packets
looks at the network traffic and distinguishes between normal activity and suspicious activity.
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traffic analysis
analysis that asks how much traffic must flow over each of the network's many individual transmission links.
examines the flow of network traffic for patterns and exceptions to those patterns
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traffic analysis
examines the flow of network traffic for patterns and exceptions to those patterns
looks at the network traffic and distinguishes between normal activity and suspicious activity.
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traffic analysis
>> traffic analysis involves determining the location and identity of communicating hosts and could observe the frequency and length of messages being exchanged.
looks at the network traffic and distinguishes between normal activity and suspicious activity.
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traffic analysis
analysis that asks how much traffic must flow over each of the network's many individual transmission links.
>> traffic analysis involves determining the location and identity of communicating hosts and could observe the frequency and length of messages being exchanged.
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traffic analysis
examines the flow of network traffic for patterns and exceptions to those patterns
>> traffic analysis involves determining the location and identity of communicating hosts and could observe the frequency and length of messages being exchanged.
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traffic analysis
analysis that asks how much traffic must flow over each of the network's many individual transmission links.
looks at the network traffic and distinguishes between normal activity and suspicious activity.
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traffic analysis
the attempt to gather information about somebody's internet connections by analyzing the timing, length, and destinations of their packets
examines the flow of network traffic for patterns and exceptions to those patterns
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traffic analysis
analysis that asks how much traffic must flow over each of the network's many individual transmission links.
the attempt to gather information about somebody's internet connections by analyzing the timing, length, and destinations of their packets
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traffic analysis
the attempt to gather information about somebody's internet connections by analyzing the timing, length, and destinations of their packets
>> traffic analysis involves determining the location and identity of communicating hosts and could observe the frequency and length of messages being exchanged.
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hard real-time systems
oses that have tight timing constraints (ex: one used in a hospital)
task must be serviced by its deadline. e.g. flight control system
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random variables
well defined function from a sample space to the set of real numbers
-subject to variation due to chance -two types: discrete and random
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random variables
well defined function from a sample space to the set of real numbers
represents some &"number&" that occurs randomly and for which we can assign a probability
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random variables
always quantitative (either discrete or continuous) notation: x, y, z
represents some &"number&" that occurs randomly and for which we can assign a probability
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random variables
always quantitative (either discrete or continuous) notation: x, y, z
well defined function from a sample space to the set of real numbers
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random variables
-subject to variation due to chance -two types: discrete and random
values that variable takes resulting from random phenomenon; explained by probability distribution - either discrete or continuous
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random variables
probability, mean, variance, percentiles, experimental design, cross-validation, goodness of fit, and robust statistics , ...
-are values that are determined by chance.
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random variables
always quantitative (either discrete or continuous) notation: x, y, z
is a variable (typically represented by x) that has a single numerical value (determined by chance) for each outcome of an experiment
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random variables
values that variable takes resulting from random phenomenon; explained by probability distribution - either discrete or continuous
variables whose values are determined by chance
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random variables
is a variable (typically represented by x) that has a single numerical value (determined by chance) for each outcome of an experiment
-subject to variation due to chance -two types: discrete and random
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random variables
well defined function from a sample space to the set of real numbers
variables whose values are determined by chance
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random variables
a numerical description of the outcome of an experiment
well defined function from a sample space to the set of real numbers
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random variables
is a variable (typically represented by x) that has a single numerical value (determined by chance) for each outcome of an experiment
values that variable takes resulting from random phenomenon; explained by probability distribution - either discrete or continuous
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random variables
a numerical description of the outcome of an experiment
always quantitative (either discrete or continuous) notation: x, y, z
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random variables
a numerical description of the outcome of an experiment
is a variable (typically represented by x) that has a single numerical value (determined by chance) for each outcome of an experiment
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random variables
a numerical description of the outcome of an experiment
values that variable takes resulting from random phenomenon; explained by probability distribution - either discrete or continuous
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random variables
a numerical measure of the outcome of a random phenomenon. it transfers random outcomes or events into real values
a variable whose possible values are numerical outcomes of a random phenomenon
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random variables
always quantitative (either discrete or continuous) notation: x, y, z
values that variable takes resulting from random phenomenon; explained by probability distribution - either discrete or continuous
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random variables
is a variable (typically represented by x) that has a single numerical value (determined by chance) for each outcome of an experiment
represents some &"number&" that occurs randomly and for which we can assign a probability
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random variables
values that variable takes resulting from random phenomenon; explained by probability distribution - either discrete or continuous
represents some &"number&" that occurs randomly and for which we can assign a probability
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random variables
-parameters that are not known with a high degree of certainty -randomly generated from the specified probability distributions.
input to a simulation model whose value is uncertain and described by a probability distribution.
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random variables
-subject to variation due to chance -two types: discrete and random
variables whose values are determined by chance
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random variables
is a variable (typically represented by x) that has a single numerical value (determined by chance) for each outcome of an experiment
variables whose values are determined by chance
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random variables
numerical outcome of a random phenomenon.
the outcome is random, as is the mean calculated from a random sample.
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random variables
a variable whose possible values are numerical outcomes of a random phenomenon
the outcome is random, as is the mean calculated from a random sample.
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random variables
a numerical description of the outcome of an experiment
variables whose values are determined by chance
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random variables
variables whose values are determined by chance
represents some &"number&" that occurs randomly and for which we can assign a probability
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decision tree
graphical representation of a decision table's conditions, actions, and rules
a graphical representation of the conditions, actions, and rules found in a decision table.
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decision tree
nodes represent decision points, and children represent options available
decision trees work by evaluating a question containing a feature at every node and selecting a branch to the next node, based on the answer.
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decision tree
a data mining methodology. a tool used in decision analysis and is another tool used to represent the entity-relationship model.
a tool that uses tree-like graphs of decisions and possible consequences
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decision tree
represent a hierarchical segmentation of data model of decisions and their possible consequences, including chance event outcomes, resource costs, and utility.
a tool that uses tree-like graphs of decisions and possible consequences
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decision tree
a mathematical model used to assist a business in making a decision
a schematic model of decision making showing the available alternatives for the decision maker including the possible consequences
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decision tree
decision node: ask q about attribute edges: answer to the question (specific value or range of values). connects to another decision node
nodes represent decision points, and children represent options available
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decision tree
a graphical method which aids decision making by identifying and quantifying possible outcomes, probabilities of outcomes and expected values of outcomes
map possible outcomes of a series of related choices guides thinking towards desired outcome
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decision tree
a tool that can be used to visualize the important aspects of a problem. this graphical model shows decisions, alternatives, actions, and outcomes. use: sequence of decisions
a decision tree is a tool that can be used to visualize the important aspects of a problem. this graphical model shows decisions, alternatives, actions, and outcomes.
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decision tree
a diagram that lays out different branches that are the result of different decisions made or the result of different economic situations.
shows how different decisions during a project's life can affect its value
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decision tree
represent a hierarchical segmentation of data model of decisions and their possible consequences, including chance event outcomes, resource costs, and utility.
a schematic representation of the available alternatives and their possible consequences, useful for analyzing sequential decisions.
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decision tree
modeling tool used to evaluate independent decisions that must be made in sequence.
a schematic representation of the available alternatives and their possible consequences, useful for analyzing sequential decisions.
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decision tree
a way to structure multi-stage decision problems that allows us to identify courses of action, consider probability of multiple different states of nature, assess outcomes, and select the best alternative
a simple and visual way of presenting the alternative course of action available when making a decision. it is a mathematical model based on logic and probability.
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decision tree
enable you to develop classification systems that predict or classify future observations based on a set of decision rules
classification predictive detect criteria for divide pop into classes. two way tables
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decision tree
hypothesis in the form of a tree, used for classification of instances represented as feature vectors
graphically depicts business processes that usually contain several steps circles represent decisions and squares represent actions
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decision tree
a diagram of possible alternatives and their expected consequences used to formulate possible courses of actions in order to make decisions.
show complex processes with multiple decision rules. display decision logic (if statements) as set of (nodes) questions and branches (answers).
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decision tree
a graphical method which aids decision making by identifying and quantifying possible outcomes, probabilities of outcomes and expected values of outcomes
a graph that helps decision makers use probability theory by showing the expected values of decisions in varying circumstances
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decision tree
special type of a search tree you can use to find a solution to a problem by choosing from alternatives starting from the root node.
decision node: ask q about attribute edges: answer to the question (specific value or range of values). connects to another decision node
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decision tree
a schematic representation of the available alternatives and their possible consequences, useful for analyzing sequential decisions.
a decision support tool that uses a tree-like model of decisions and their possible consequences, including chance event outcomes, resource costs, and utility.
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decision tree
a mathematical model used to assist a business in making a decision
a schematic model of alternatives available to the decision maker along with their possible consequences.
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decision tree
• by observing the data and splitting it into sections, rules are created for either prediction or classification problems. • mimics a subject matter expert...pre data mining days.
classification predictive detect criteria for divide pop into classes. two way tables
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decision tree
hypothesis in the form of a tree, used for classification of instances represented as feature vectors
a graphical presentation of a sequence of interrelated decisions to be made under assume risk. classified specific entities into classes based on its features.
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decision tree
a graphical presentation of a sequence of interrelated decisions to be made under assume risk. classified specific entities into classes based on its features.
graphically depicts business processes that usually contain several steps circles represent decisions and squares represent actions
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decision tree
a data mining methodology. a tool used in decision analysis and is another tool used to represent the entity-relationship model.
a decision support tool that uses a tree-like model of decisions and their possible consequences, including chance event outcomes, resource costs, and utility.
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decision tree
represent a hierarchical segmentation of data model of decisions and their possible consequences, including chance event outcomes, resource costs, and utility.
a decision support tool that uses a tree-like model of decisions and their possible consequences, including chance event outcomes, resource costs, and utility.
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decision tree
modeling tool used to evaluate independent decisions that must be made in sequence.
a tool that uses tree-like graphs of decisions and possible consequences
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decision tree
provides a graphical representation of the decision-making process square node - means you need to make a decision
modeling tool used to evaluate independent decisions that must be made in sequence.
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decision tree
special type of a search tree you can use to find a solution to a problem by choosing from alternatives starting from the root node.
decision trees work by evaluating a question containing a feature at every node and selecting a branch to the next node, based on the answer.
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decision tree
often tied to the outcome of other events. shows schematic of how things could progress and provides alternatives
a graph that helps decision makers use probability theory by showing the expected values of decisions in varying circumstances
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decision tree
it recursively divides a training set until each division consist entirely or primarily of examples from one class.
▪employs the divide and conquer method ▪recursively divides a training set until each division consists of examples from one class
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decision tree
represent a hierarchical segmentation of data model of decisions and their possible consequences, including chance event outcomes, resource costs, and utility.
provides a graphical representation of the decision-making process square node - means you need to make a decision
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decision tree
a graphical presentation of a sequence of interrelated decisions to be made under assume risk. classified specific entities into classes based on its features.
-acyclic graph to make decision -each node has a feature examined and then path determined -predict class given a feature
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decision tree
a schematic model of decision making showing the available alternatives for the decision maker including the possible consequences
a schematic model of alternatives available to the decision maker along with their possible consequences.
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decision tree
a data mining methodology. a tool used in decision analysis and is another tool used to represent the entity-relationship model.
a schematic representation of the available alternatives and their possible consequences, useful for analyzing sequential decisions.
2
1
decision tree
a graphical representation of the conditions, actions, and rules found in a decision table.
graphical representation of decisions table
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decision tree
represent a hierarchical segmentation of data model of decisions and their possible consequences, including chance event outcomes, resource costs, and utility.
modeling tool used to evaluate independent decisions that must be made in sequence.
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decision tree
a graph of decisions and their possible consequences; it is used to create a plan to reach a goal
hierarchical arrangement of criteria that predict a classification or value easy to understand easy to implement can deal with partial or incomplete data
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decision tree
provides a graphical representation of the decision-making process square node - means you need to make a decision
a schematic representation of the available alternatives and their possible consequences, useful for analyzing sequential decisions.
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decision tree
often tied to the outcome of other events. shows schematic of how things could progress and provides alternatives
map possible outcomes of a series of related choices guides thinking towards desired outcome
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decision tree
hypothesis in the form of a tree, used for classification of instances represented as feature vectors
built from examples, traversed to draw conclusions based on data divide-and-conquer, greedy search can be viewed as a description of a concept as well as a path to a decision
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decision tree
special type of a search tree you can use to find a solution to a problem by choosing from alternatives starting from the root node.
nodes represent decision points, and children represent options available
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decision tree
hierarchical arrangement of criteria that predict a classification or value easy to understand easy to implement can deal with partial or incomplete data
graph of decisions and their possible consequences, used to create a plan to reach a goal a hierarchical arrangement of criteria that predict a classification or a value
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decision tree
provides a graphical representation of the decision-making process square node - means you need to make a decision
a data mining methodology. a tool used in decision analysis and is another tool used to represent the entity-relationship model.
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requirements engineering
the processes involved in developing system requirements.
the process of systematically identifying and handling the requirements for a software system
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requirements engineering
the process of systematically identifying and handling the requirements for a software system
a systematic process of understanding and specifying the solution, and managing the requirements