layered model architecture is tcp/ip model .you can reference this model as layered model architecture protocol.
layered model architecture is tcp/ip model .you can reference this model as layered model architecture protocol.
Micro kernel's have more fun. Where layered models tend to have drinking problems
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David B. Hanna has written: 'The layered city' -- subject(s): Architecture, Domestic, Domestic Architecture
The O.S has been divided into different layers and each layer has mentained some hierarchy.
The following are the advantages of a layered architecture:Layered architecture increases flexibility, maintainability, and scalability. In a Layered architecture we separate the user interface from the business logic, and the business logic from the data access logic. Separation of concerns among these logical layers and components is easily achieved with the help of layered architecture.Multiple applications can reuse the components. For example if we want a windows user interface rather than a web browser interface, this can be done in an easy and fast way by just replacing the UI component. All the other components like business logic, data access and the database remains the same. Layered architecture allows to swap and reuse components at will.Layered architecture enables teams to work on different parts of the application parallely with minimal dependencies on other teams.Layered architecture enables develop loosely coupled systems.Different components of the application can be independently deployed, maintained, and updated, on different time schedules.Layered architecture also makes it possible to configure different levels of security to different components deployed on different boxes. sO Layered architecture, enables you to secure portions of the application behind the firewall and make other components accessible from the Internet.Layered architecture also helps you to test the components independently of each other.The following are the disadvantages of a layered architecture:There might be a negative impact on the performance as we have the extra overhead of passing through layers instead of calling a component directly.Development of user-intensive applications can sometime take longer if the layering prevents the use of user interface components that directly interact with the database.The use of layers helps to control and encapsulate the complexity of large applications, but adds complexity to simple applications.Changes to lower level interfaces tend to percolate to higher levels, especially if the relaxed layered approach is used.
Hagay Katz has written: 'Information layered architecture model, layers, methodology & their application for service activation'
Not always, but the more complex the protocol the more likely a layered architecture will simplify design and implementation.
The following are the advantages of a layered architecture:Layered architecture increases flexibility, maintainability, and scalability. In a Layered architecture we separate the user interface from the business logic, and the business logic from the data access logic. Separation of concerns among these logical layers and components is easily achieved with the help of layered architecture.Multiple applications can reuse the components. For example if we want a windows user interface rather than a web browser interface, this can be done in an easy and fast way by just replacing the UI component. All the other components like business logic, data access and the database remains the same. Layered architecture allows to swap and reuse components at will.Layered architecture enables teams to work on different parts of the application parallely with minimal dependencies on other teams.Layered architecture enables develop loosely coupled systems.Different components of the application can be independently deployed, maintained, and updated, on different time schedules.Layered architecture also makes it possible to configure different levels of security to different components deployed on different boxes. sO Layered architecture, enables you to secure portions of the application behind the firewall and make other components accessible from the Internet.Layered architecture also helps you to test the components independently of each other.The following are the disadvantages of a layered architecture:There might be a negative impact on the performance as we have the extra overhead of passing through layers instead of calling a component directly.Development of user-intensive applications can sometime take longer if the layering prevents the use of user interface components that directly interact with the database.The use of layers helps to control and encapsulate the complexity of large applications, but adds complexity to simple applications.Changes to lower level interfaces tend to percolate to higher levels, especially if the relaxed layered approach is used.
Principles are not advantages or disadvantages of the layered approach, principles are behind the layered approachPrinciples:Data transmission error free.Minimum time for route discovery.Communication between layers through primitives.Congestion control for minimum delays and retransmission.Minimum effort in replacing new layer in the existing network layers.
• When used appropriately, a layered design can lessen the overall impact of changes to the application. •Allows you to modify a component without disturbing the next one •Design scalable and maintainable web applications rapidly •Increase security level of an application
LCP sets up the PPP connection and its parameters. NCP handles higher layer protocol configurations.