What are the seven layers of connectivity in the OSI model? Briefly define the goal of each layer.

When discussing networking, the OSI model often uses the term "vertical stack" to describe the seven layers that make up the OSI reference architecture. Tell me about a layer of this approach in the healthcare sector, and give me a brief overview of how it fits into the bigger picture. For what reasons is this layer so important to the overall structure of the network?

There are seven tiers in the open systems interconnection (OSI) concept. Just what are they? Explain in a few words what purpose (or purposes) each layer serves.

To start a software development company, your dad probably purchased 50 nodes. In order to communicate with one another, he instructed you to connect to the various nodes in the network. With future expansion of the network's node count in mind, scalability has emerged as a top priority. Identify the label for the topology in question.