H-I


Hard boundary

A routing boundary in which Exterior Gateway Protocols are predominantly used to pass routing information.

Hard state

Determining and persistently maintaining connection information along the path of a connection, between source and destination.

Hierarchical client-server architectural model

An architectural model based on the hierarchical client-server flow model. In addition to the functions, features, and services being focused at server locations and client-server flows, they are also focused at the server-server flows.

Hierarchical client-server flow model

A flow model that has the characteristics of a client-server flow model but that also has multiple layers, or tiers between servers.

Hierarchical management

When the management functions (monitoring, display, storage, and processing) are separated and placed on separate devices.

Hierarchy

The degree of concentration of networks or traffic flows at interconnection points within the network, as well as the number of tiers of interconnection points within the network.

High performance

An indicator that the service request or requirement's performance characteristics are greater than a performance threshold determined for that network.

High-performance network

A network that typically has one or a few applications, users/groups, and/or devices whose performance requirements are significantly greater than other performance requirements for that network.

High-performance/general-performance architectural model

Model that focuses on identifying networks or parts of a network as general performance, as high performance, or as having components of both.

Human response time

An estimate of the time threshold when users begin to perceive delay in the system.

In-band management

When the data flows for network management follow the same network paths as the traffic flows for users and their applications.

Individual flow

The flow associated with a single session of an application.

Initial conditions

Initial input to the requirements analysis process, consisting of the type of network project, scope of the architecture and design, initial architecture/design goals, and any outside forces acting on the network.

Instrumentation

For network management, the set of tools and utilities needed to monitor and probe the network for management data.

Interconnection mechanisms

Mechanisms that interconnect network technologies, including shared media, switching, bridging, and routing.

Integrated services

A quality-of-service mechanism that defines values and mechanisms for allocating resources to flows across the end-to-end path of the flow.

Interactive applications

Applications that assume some timing relationship between source and destination while the application session is active, however, the timing relationship is not as strict as it is in real-time.

Interactive bulk applications

Applications in which the end-to-end or round-trip network delays are not the predominant delay for that application, but processing at the device or application component is the predominant delay.

Interactive burst applications

Applications in which the end-to-end or round-trip network delays are the predominant delay for that application.

Interactivity

A user requirement for a response time from the system (as well as the network) that is on the order of the response times of users.

Interconnectivity

A balance to hierarchy in a network, interconnectivity is the degree of connections within the network at different levels in the design, to provide greater performance through parts of the network.

Interior Gateway Protocols (IGPs)

Routing protocols that communicate routing information primarily within an AS.

Intranet/extranet architectural model

Architectural model that focuses on security and privacy, including the separation of users, devices, and applications based on secure access.

IPSec

A protocol for providing authentication and encryption between devices at the network layer.

IP services

A set of mechanisms to configure, operate, manage, provision, and account for resources in the network that allocate performance to users, applications, and devices.




Network Analysis, Architecture and Design
Network Analysis, Architecture and Design, Second Edition (The Morgan Kaufmann Series in Networking)
ISBN: 1558608877
EAN: 2147483647
Year: 2003
Pages: 161

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