02 Jul Weekn 5 Discussion Question
Question Description
Question 1
You are a systems analyst and you are tasked to build a new website system for a publishing company. You have a solid experience is with traditional data and process modeling techniques. Recently, you learned an object-oriented approach and you decide to try it by mixing it with the traditional structured analysis approach. Therefore, the question is, “Can structured techniques and object-oriented techniques be mixed? How should we start? How can they be mixed? How are the tasks in this mixed approach different from traditional structured analysis?
Question 2
2. Wonderful Chicken Wings restaurant wants to automate its system to order chicken wings for delivery through a phone. When customers call Wonderful Chicken Wings on the phone, they are asked their phone number. When the number is typed into a computer and if this is a regular customer then the name, address, and last order date is automatically brought up on the screen. However, if this is a new customer then they will be asked for their name and address and then a new customer record is created. The order will then be taken and the total plus tax is calculated.
The order will be given to the restaurant chef for cooking and a receipt will be printed. A delivery person picks up and give customers their order and a copy of the receipt. The system also reports weekly totals to the company management for comparison with last year’s performance.
a. Draw a context-level data flow diagram for the “Wonderful Chicken Wings Order” system.
b. Explode the above context-level diagram by drawing the logical data flow diagram level 0 showing all the major processes.
Question 3
Your manager recently mentioned to you that “since data flow diagrams and systems flowcharts provide redundant pictures of an information system so we don’t need both. As a result, we can eliminate one of them to save time and deliver our system ahead of timer.” Do you agree with your manager? Please respond to your manager with your comment as a systems analyst.
Question 4
Your boss is asking each engineer from all departments to come up with the one or two sources of network threats and attacks you consider the most critical and why. He wants you to be able to fit your thoughts on an index card. He does not care if the same problem is addressed from several points of view or if you address a very specific “threat of the day” or one from the past that could come back. You are also asked to have an opinion about the potential risks of such threats and attacks.
With limited time and resources your manager wants everyone to suggest the structure of a network defense system to protect the computers and the network. Since this is an open discussion if your favorite idea has been discussed “to death” pick the next. These are pro-active steps. Consider at least two solutions and why one ranks high on your mind.
Hint: When describe typical attacks make reference to the corresponding layer and the controls that are employed in that layer to minimize the attack or vulnerability that leads to the attack. For example, in the link layer, there is ARP spoofing and man-in-the-middle attacks. In the IP layer, there is packet sniffing. In the transport layer, there is the SYN flood attack causing Denial of Service. Be as complete as possible and cite your reference materials in your response. We have not talked much about the physical layer. In physical layer, for example, an attacker can cut a cable or jam a wireless signal affecting availability or wiretap affecting confidentiality. You may need to dig up sources on the physical layer security.
Let each question have in-text citation and reference
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