1. Requirements definition is one of the most important aspects of information system development and software engineering. Requirements should also be of high quality. Suppose that you are consulting a physician's office develop an information system to support scheduling, biling, and other related activities. Prepare answers to the following questions .

a. It is usually helpful to separate the requirements into several categories. What are the two common categories ? Describe and provide an example for each.

b. Reliability and safety are closely related attributes. Highlight their most important distinction and explain how it is possible for a reliable system to be unsafe and a safe system to be unreliable?

c. What are the characteristics or metrics that make requirements of high quality ? List three and describe them .

2. The various functions that network hardware and software must perform can be categorized as a series of functional layers, with each layer built on and depending on the proper functioning of the layers above and below it. The TCP /P Model is the most widely one on the Internet. Answer the following questions .

a. List and describe the function of the layers of the TCP /IP stacks.

b. What does IP handle on the Intemet ? At which layers of the TCP /IP does IP operate?

c. What does TCP handle on the Intemet ?

d. What is the three-way handshake?