Explain the two main reason for using layered protocol architecture for network communication?

Answer 1

1. Protocol layering is a common technique to simplify networking designs by dividing them into functional layers, and assigning protocols to perform each layer's task.

For example, it is common to separate the functions of data delivery and connection management into separate layers, and therefore separate protocols. Thus, one protocol is designed to perform data delivery, and another protocol, layered above the first, performs connection management. The data delivery protocol is fairly simple and knows nothing of connection management. The connection management protocol is also fairly simple, since it doesn't need to concern itself with data delivery.

2. Protocol layering produces simple protocols, each with a few well defined tasks. These protocols can then be assembled into a useful whole. Individual protocols can also be removed or replaced as needed for particular applications.

The most important layered protocol designs are the Internets original DoD model, and the OSI Seven Layer Model. The modern internet represents a fusion of both models.

1. Protocol layering is a common technique to simplify networking designs by dividing them into functional layers, and assigning protocols to perform each layer's task.

For example, it is common to separate the functions of data delivery and connection management into separate layers, and therefore separate protocols. Thus, one protocol is designed to perform data delivery, and another protocol, layered above the first, performs connection management. The data delivery protocol is fairly simple and knows nothing of connection management. The connection management protocol is also fairly simple, since it doesn't need to concern itself with data delivery.

2. Protocol layering produces simple protocols, each with a few well defined tasks. These protocols can then be assembled into a useful whole. Individual protocols can also be removed or replaced as needed for particular applications.

The most important layered protocol designs are the Internets original DoD model, and the OSI Seven Layer Model. The modern Internet represents a fusion of both models.

Answer 2

The following are the two main reasons:

Reduction of the Domino Effect - Another very important advantage of a layered protocol system is that it helps to prevent changes in one layer from affecting other layers. This helps to expedite technology development.

Rapid Application Development (RAD) - Work loads can be evenly distributed which means that multiple activities can be conducted in parallel thereby reducing the time taken to develop, debug, optimize and package new technologies ready for production implementation.

Answer 3

because it provide independent layer on those we can implement individual implementation without affecting other layers. new delivery technology can be introdused without affecting other layers.