I need the network requirements described (Physical Layer, Data Link, Network De

Question

I need the network requirements described (Physical Layer, Data Link, Network Design and Network Layer). I have included the portion I have already completed which describes the type of business and tool I need to be used for the network requirements.

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I. Network Requirements

2. Physical Layer Requirements

You need to identify at least one physical medium for any LAN and one physical medium for any WAN in your proposed network. Please refer to Section 3.3 of the textbook for a comparative analysis of different physical media types. Please use Section 2.a of the Network Requirements 1 template to identify the geographical extent of the network and transmissions speed required (LAN or WAN). You only need to identify distances, such as office, campus or wide area distances. As for speeds, please do research on the bits per second transmission speeds for different media types and use an approximate range.

In Section 2.a, explain how you compared various media types and how did you decide on your choice of media type. In Section 2.b, you need to briefly compare the cost of various physical media types for your network, and explain which one you would choose for your network. Please keep in mind the bushiness and performance objectives of your service you described in your proposal, and make sure your choice of physical media is consistent with your objectives. In Section 2, please summarize your choice for physical media in fewer than 100 words.

3. Data Link Layer Considerations

In Section 3, you will explain the role of the data link layer in your proposed network in not exceeding 150 words. More specifically, you will explain two main factors that are commonly considered.

1) The need for medium access control: Will there be contention for physical media in your network, and if so, give examples of where it is possible in your network.

2) Will you require error control in your data link layer? How error prone is your medium? What are some of the links in your network that will require a good error control mechanism?

4. Network Design

Network design is a cyclical process in which you iterate and detail the specifications of your network requirements several times. Please revisit your proposal document and use the preliminary requirements to identify the network architecture components as given Figure 6-1 of the textbook. In Section 4 of the template, you will identify the key network architecture components.

Identify the LAN or access network within your proposed network. Identify the key components in the LAN. Is your LAN all within one location, or is it spread out in multiple locations? Do you have a campus with multiple LANs? Do you have a data center LAN or an e-commerce LAN in your network? Do the clients need to be within a LAN to access your applications? After you identify all possible LANs, list the characteristics of all the LANs you have in your network. You may not have all the LANs listed in Figure 6-1, and you may even consider LANs in the client locations (not listed in the figure). Identify the topology and components that are possible in your LAN.

Identify the enterprise edge components in your network. Do you have to connect multiple campus locations, and if that's the case, you may subscribe to a WAN service. WAN is optional depending on your proposed network needs. In most cases, your network may have access to Internet from a service provider. Your network should have at least one enterprise edge component depicted in Figure 6-1. Once you identify your network edge, write about the characteristics and components (devices and services) required at the network edge. At this point, you only need to do a preliminary analysis of the network edge. We will cover the details in the upcoming weeks.

If your network involves a campus backbone, identify the characteristics and requirements of the backbone network.

Attach a diagram with the submission template if possible.

5. Network Layer

In Section 5 of the template, explain the role of routers in your proposed network. Depending on your service, you may require a router to connect different subnets (LANs, backbones, and edge networks) within your network. Identify some of the likely subnets. Also, explain why you need an IP address in your network. Explain the role of DNS in your network. If your service requires some sort of Internet connectivity, you may use a gateway router. Explain briefly how a gateway router works.

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My progress up until this point:

1. Description of the Service - Summary

BBA is on location bridal and special event hair/makeup styling service and is available 7 days a week (except holidays). The company also offers the purchase of salon grade products. In order to streamline scheduling, this tool will allow customers to view and book available dates from their computer or mobile device. It will also provide pricing information and allow customers to pay the deposit at time of booking. It will also allow them to purchase products of their choice and have them shipped directly to their home or pick up in the salon.

2. Intended clients or customers

Intended for both men and women in any industry although focusing mainly on the bridal sector.

3. Business Objective Statement

The primary objective for this tool is to enhance the user experience when planning and booking hair/makeup service for their wedding or event, and to provide a variety of salon grade products that are available at the fingertips of the user. This tool must be user friendly to ensure maximum availability to all types of clients.

4. Application Architecture Description

This tool will include an interface for users to log in and register for an account, an interactive calendar for booking services, payment services for both event service and purchased product, shipping of purchased product, and customer interaction and support.

5. Information provided to the clients

To ensure customer satisfaction, a booking calendar will show available event dates, it will provide status of in stock salon grade products with detailed descriptions and pricing information.

6. Basic Requirements

New customers will be required to create an account using the sign up button. This account will require name, address, phone, email and possible event dates and type of event (if applicable).

Conclusion

This tool will seek to provide a streamlined booking and appointment setting service, along with providing options for payment and purchase of salon products. It will be very user friendly and the admin will be able to navigate through the application with ease.

Explanation / Answer

Physical Layer Requirements: Since, the business will run using a website on the internet, having a strong network that can help provide the data in a reliable way is important. We shall make use of optical fibre for this purpose.

In the LAN, we can use wireless signals. This will be used by the website admin and the support staff to update the website. The website will be stored in a central harddisk in the LAN. The system containing this hard disk will be connected to the WAN using optical fibre. This is because optical fibre is the most reliable economic medium in terms of transmission speed.

The network will have an average transmission speed of 1 Gbps.

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Data Link Layer Considerations:
1. In order to decide whether any kind of contention is required, we have to first study the number of users who will be accessing the network at a time. This number will not be very very high. Optical fibres are enough to manage the traffic. Hence, we can use statistical time division multiplexing. In this method, any user can send and receive data any time in a first come first serve basis.

Error control is important in the network. The admin and staff of the network are able to update the website using wireless in the LAN. Wireless is not very reliable. Hence, errors can occur. This is a place requiring good measures for error control.

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Network Design:
The application is connected to the internet and clients interact with the application using the internet. This heavily takes off the burden from the local networks. We can have just a single LAN for the staff and the people of the company to update the application and manage it. Thus, we need only a single LAN in a single campus.

All the systems in the LAN are connected to a central system which is then connected to the internet. This is the system which hosts the application in the final form. So, we will have a "Star topology". The central system hosts the application.

Thus, the network will comprise of the following components:
- central router placed between the Internet Service provider and the central computer. Another router whose one end is connected to the central computer and other ends are connected to the other systems of the LAN. The systems of the LAN are only allowed to communicate through the central system.

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Network Layer:
The network will have two routers:
1. The gateway router: This router is connected between the central computer and the internet service provider. When a computer wants to communicate with another computer within the range of IP address of the LAN, it can do so directly using the central computer present in the star topology. However if a computer wants to communicate with some host or website in the internet, it can't do so directly. The request goes through the gateway router which then communicates it to the internet service provider and gets the requested data.
2. The local router. This is the router to which all the network's local systems are connected. This router allows direct communication only between central system and other system. One system has to go through the central system to communicate with another system.

Every system in the network is assign an IP address. IP address helps to identify the systems. The network has a whole is also assigned an IP address. This helps identify the network on the internet (or the ISP depending on the design followed by the ISP).

The work of DNS is to resolve the addresses into their corresponding IP addresses.

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NOTE: You have not mentioned anything about whether your application is serving the clients over the internet or the clients have to come to a local area such as your shop or company or something to apply for the service. I've assumed that you are serving over the internet and provided the answer accordingly.

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