Network Analysis, Architecture and Design, Second Edition (The Morgan Kaufmann Series in Networking)
- Data flows
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See Flows.
- Data sink
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A device that collects or terminates data on a network.
- Data source
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A device that produces data on a network.
- De facto standard
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A standard that is generally accepted through being widely implemented and used.
- Default route
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The route used when there is no other route for that destination. It is the route of last resort.
- Default route propagation
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The technique used to inform the network (or subnets or functional areas) of the default route.
- Delay
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A measure of the time difference in the transmission of information across the system.
- Differentiated services
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A quality-of-service mechanism that defines a set of values (termed differentiated services code points [DSCPs]) for classes of traffic flows to be used by resource control mechanisms.
- Directionality
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The preference of a flow to have more requirements in one direction than in another.
- Distributed-computing architectural model
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An architectural model that follows the distributed-computing flow model and in which the data sources and sinks are obvious locations for architectural features.
- Distributed-computing flow model
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A flow model that either has the inverse of the characteristics of the client-server flow model or is a hybrid of peer-to-peer and client-server flow models.
- Distributed management
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When there are multiple separate components to the management system and these components are strategically placed across the network, localizing network management traffic and distributing management domains.
- Downstream
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Traffic flowing in the direction from the source to the destination.
- Dropping
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In traffic conditioning, discarding nonconforming traffic.
- Encryption
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A security mechanism in which cipher algorithms are applied together with a secret key to encrypt data so that they are unreadable if intercepted.
- End-to-end architectural model
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Architectural model that focuses on all components in the end-to-end path of a traffic flow.
- End-to-end (network element) characteristics
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Characteristics that can be measured across multiple network elements in the path of one or more traffic flows and may extend across the entire network or between devices.
- Environment-specific thresholds
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Performance thresholds that are determined for the environment of the current network project on which you are working.
- Event
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Something that occurs in the network that is worthy of noting, whether informational, as a problem, or as an alarm.
- Exterior Gateway Protocols
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Routing protocols that communicate routing information (reachability and metrics) primarily between ASs.
- External interfaces
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The network interfaces between your network and other, outside (external) networks.
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