Cisco Service Oriented Network Architecture (SONA): SONA is like a blueprint for building a modern and efficient network. It's a set of guidelines and principles from Cisco to help organizations design and manage their networks effectively.
Network Design Methodology: Think of this as the step-by-step process for creating a network. It's like building a house - you start with a plan, gather materials, and put everything together. Network design follows a similar process to create a functional and efficient network.
Top-Down vs. Bottom-Up Approach to Network Design:
-
Top-Down: This is like planning a big event. You start with the big picture, like the theme of the event and what you want to achieve. In network design, it means starting with the overall goals and requirements before diving into the details.
-
Bottom-Up: It's like building with Lego bricks, starting with the individual pieces and then putting them together. In network design, this approach focuses on the specific components and connections first before looking at how they fit into the bigger network.
Classic Three-Layer Hierarchical Model: Core, Access, and Distribution Layers:
-
Core Layer: Imagine this as the highway system of your network. It's responsible for quickly moving data between different parts of your network. It's like the superhighway connecting all the important places in a city.
-
Access Layer: Think of this as the streets and roads that connect houses and businesses to the highway. It's where devices like computers and printers connect to the network.
-
Distribution Layer: This layer is like the main roads that connect neighborhoods to the highway. It helps control the flow of data between the core and access layers.
Campus Design Considerations: When designing a network for a campus, like a university or a big company, you need to think about things like the size of the campus, the number of people, the types of devices, and the specific needs of the users. It's like designing a city layout, considering the population and what services are required.
Designing a Campus Network Topology: This is like planning the layout of a city. You decide where the main buildings (like data centers and offices) are located, how they connect, and what paths (network cables and connections) people and data will use to get from one place to another. You want to make sure it's efficient and reliable, just like planning a well-organized city.
