You have been hired by an international coffee and tea retailer with hundreds of
ID: 3916495 • Letter: Y
Question
You have been hired by an international coffee and tea retailer with hundreds of shops around the world. This organization, like most in the industry, is known for providing high-end coffees, teas, and snacks in a café setting frequented by neighbors and business people in search of an Internet connection. This organization has a corporate headquarters located in Seattle, Washington. Your task is to recommend a network architecture that will be optimal for the organization to implement in order to offer secure public wireless in each location in a consistent, cost-effective, and secure manner. Engage in research to explore the available alternatives that would fit these criteria as well as apply the information from the required study materials. Write a 2 to 3 page paper that covers the following topics:
Describe the alternative architectures that would be appropriate to meet the objectives of the project.
Analyze the pros and cons of each alternative architecture.
Determine the security implications of each alternative architecture.
Recommend an architecture that is optimal for implementation by this coffee and tea retailer
Provide support for your recommendations.
Assignment Requirements
Written communication: Written communication is free of errors that detract from the overall message.
APA formatting: Resources and citations are formatted according to APA (6th edition) style and formatting.
Length of paper: 2 to 3 pages, excluding the references page.
Font and font size: Times New Roman, 12 point.
Explanation / Answer
Note: I have tried to answer the first part and I have followed the concept of Network Design by Cisco
Large network design projects are normally divided into three distinct steps:
Step 1-Identify the network requirements:
To meet the business goal, in this given case, we need an architecture that allows for both flexibility and growth. So, Hierarchical Network Design is the best suited model for me.
In networking, a hierarchical design is used to group devices into multiple networks. The networks are organized in a layered approach. The hierarchical design model has three basic layers:
Core layer: Connects distribution layer devices
Distribution layer:Interconnects the smaller local networks
Access layer: Provides connectivity for network hosts and end devices
Hierarchical networks are more beneficial than flat network designs. The benefit of dividing a flat network into smaller, more manageable hierarchical blocks is that local traffic remains local. Only traffic destined for other networks is moved to a higher layer.
Layer 2 devices in a flat network provide little opportunity to control broadcasts or to filter undesirable traffic. As more devices and applications are added to a flat network, response times degrade until the network becomes unusable.
Step 2: Characterize the existing network: In this case, we do not have any existing computer network.
Step 3: Design the network topology and solutions:
For network topology, most preferable approach is top-down approach. In this approach, the network applications and service requirements are identified, and then the network is designed to support them.
When the design is complete, a prototype or proof-of-concept test is performed. This approach ensures that the new design functions as expected before it is implemented.
For Core Layer:
The core layer is sometimes called the network backbone. Routers and switches at the core layer provide high-speed connectivity. In an enterprise LAN, the core layer, may connect multiple buildings or multiple sites, and may provide connectivity to the server farm. The core layer includes one or more links to the devices at the enterprise edge to support Internet, virtual private networks (VPN), extranet, and WAN access. Implementing a core layer reduces the complexity of the network, making it easier to manage and troubleshoot.
The core layer design enables the efficient, high-speed transfer of data between one section of the network and another. The primary design goals at the core layer are as follows:
Technologies used at the core layer include the following:
Implementation of redundant links at the core layer ensures that network devices can find alternate paths to send data in the event of a failure. When Layer 3 devices are placed at the core layer, these redundant links can be used for load balancing in addition to providing backup.
Mesh Topology: For core layers, I would prefer a wired network in either a full-mesh or partial-mesh topology. A full-mesh topology is one in which every device has a connection to every other device. Although full-mesh topologies provide the benefit of a fully redundant network, they can be difficult to wire and manage and are more costly. For larger installations, a modified partial-mesh topology is used. In a partial-mesh topology, each device is connected to at least two others, creating sufficient redundancy without the complexity of a full mesh.
Core routers and switches can contain the following:
Redundant components increase the cost, but they are usually well worth the investment. Core layer devices should have hot-swappable components whenever possible. Hot-swappable components can be installed or removed without first having to turn off the power to the device. Using these components reduces repair time and disruption to network services.
An uninterruptible power supply(UPS) device i.e., a generator is also required to prevent minor power outages from causing large-scale network failures.
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