Information Technology Management

Earth Science

System and Network

Project Management of Information Tech

System Analysis Design and Implementation

ITM Security

Basic Finance for Managers

Theresa Bossard ITM 5400 Week 3, Chapter 4 January 25, 2015 1. Explain how an FDD can be used in requirements modeling. Funconal decomposion diagrams are visual breakdowns of the processes of an organizaon. They resemble hierarchical organizaonal charts, using mulple layers to indicate sub-processes or supporng processes. Analysts use these ch

ITM | 5400 | System Analysis Design and Implementation | homework | Theresa Bossard ITM 5400 Week 

- N-tier client/server architecture is more complex than the simple two-tiered client/server network, where the work of the entire network is balanced over several different levels of servers, depending on the kind of service being requested. List the most important secondary storage media and the strengths and limitations of each? Secondary storage technologies are: magnetic disk, optical disk, magnetic tape, and storage networks. - The principal secondary storage media are magnetic disk, optical disk, and magnetic tape. - Magnetic disks are the most widely used secondary storage medium which today is the hard disk (earlier PCs used floppy disks, which have been mostly replaced by the USB flash drive). Hard drives and USB flash drives provide fast access to data and larger storage capacities. RAID technology packages more than 100 smaller disk drives, a controller chip, and specialized software in a single large, unit delivering data over multiple paths simultaneously. - Optical disks use laser technology to store large quantities of data, including sound and images, in a highly compact form. They are available for both PCs and large computers. CD-ROM for PCs is a 4.75-inch compact disc that can store up to 660 megabytes. CD-ROM is read-only storage, but CD-RW (CD-ReWritable) discs are rewritable. Digital Video Discs (DVDs) are optical discs the same size as CD-ROMs but of even higher capacity, storing a maximum (book erroneously states “minimum” on page 116) of 4.7 gigabytes of data. DVDs are now the favored technology for storing video and large quantities of text, graphics, and audio data, and rewritable (DVD-RW) discs are widely used in personal computer systems. - Magnetic tape is still used by some companies, an older technology that is used for secondary storage of large quantities of data that are needed rapidly, but not instantly. It stores data sequentially, and is relatively slow compared to the speed of other secondary storage media. - Storage area networks (SANs) connect multiple storage devices on a separate high- speed network dedicated to storage. The SAN creates a large central pool of storage that can be rapidly accessed and shared by multiple servers. List and describe the major computer input and output devices. - Input devices include: keyboard, computer mouse, touch screen, optical character recognition, magnetic ink character recognition (MICR), pen-based input, digital scanner, audio input, and sensors. - Output devices include: monitor, printers, and audio output. 3. What are the major types of computer software used in business? Distinguish between application software and system software and explain the role played by the operating system of a computer. System software surrounds and controls access to the hardware. It manages and controls a computer’s activities. Some types of system software consist of computer language translation programs that convert programming languages into machine language that can be understood by the computer and utility programs that perform common processing tasks, such as copying, sorting, or computing a square root. The operating system allocates and assigns system resources, schedules the use of computer resources and computer jobs, and monitors computer system activities.

ITM | 5100 | System and Network | homework | - N-tier client/server archite

Case Study Questions 1. Compare the business models and areas of strength of Apple, Google, and Microsoft. Microsoft: Strengths- Microsoft is still the leader in PC operating systems and desktop productivity software, but has failed miserably with Smartphone hardware and software, mobile computing, cloud-based software apps; its internet portal. Apple: Strengths- Examples are mobile devices, such as iPhone and tablets which combine and contribute 52% of apples business. They already have a head start on the mobile phone industry where they have over 250,000 applications. Apple controls 27% of the mobile market and is the highest grossing cell phone ever. Google : Strengths- They dominate in advertising with their search engine. And their Android OS controls 41% of the mobile market share which is constantly growing 3 times faster than the iPhone market share. “They bought Android Inc. to enter the mobile market.” also bought out Motorola for 12.5 billion. Which company and business model do you believe will prevail in this epic struggle ? Explain your answer. The three-way struggle between Microsoft, apple, and Google really has no precedent in the history of computing platforms. In early contests it was typically a single firm that rode the crest of a new technology to become the dominant player. In the current struggle are three firms trying to dominate the customer experience on the internet. Each firm brings certain strengths and weaknesses to the fray.

ITM | 5100 | System and Network | homework | Case Study Questions 1. Compar

ITM 5600 Chapter 14 Homework Assignment 1. The four main credenals of the ________ are Systems Security Cerﬁed Praconer (SSCP®), Cerﬁed Informaon Systems Security Professional (CISSP®), Cerﬁed Authorizaon Professional (CAP®), and Cerﬁed Secure Soﬅware Lifecycle Professional (CSSLP®). A. GIAC/SANS Instute B. Infotec Security Cerﬁed

ITM | 5600 | ITM Security | homework | ITM 5600 Chapter 14 Homework A

Name and describe the principal network topologies. The principal network topologies include: Star topology : all devices on the network connect to a single hub and all network traffic flows through the hub. Bus topology : one station transmits signals, which travel in both directions along a single transmission segment. All of the signals are broadcast in both directions to the entire network, with special software to identify which components receive each message. Ring topology : connects network components in a closed loop. Messages pass from computer to computer in only one direction around the loop and only one station at a time may transmit. 3. How do the Internet and Internet technology work, and how do they support communication and e-business? Define the Internet, describe how it works and explain how it provides business value. The Internet is a vast network of computers that connects millions of people all over the world. The Internet uses the client/server model of computing and the TCP/IP network reference model. Every computer on the Internet is assigned a unique numeric IP address. No one owns the Internet, and it has no formal management organization. However, worldwide Internet policies are established by organizations and government bodies, such as the Internet Architecture Board and the World Wide Web Consortium. The Internet must also conform to the laws of the sovereign nation-states in which it operates, as well as the technical infrastructure that exist within the nation-state. The Internet enables employees to gain remote access to the company’s internal systems through its Web site. They are able to better service customers and suppliers, improve operational efficiency, increase productivity, lower operational costs, have a broader market base, and reach more individual customers on a global scale by establishing a Web presence. The cost of e-mail and other Internet services tend to be far lower than equivalent voice, postal, or over night delivery costs, making the Internet a very inexpensive communication medium. It is also a very fast method of communication, with messages arriving anywhere in the world in a matter of seconds or minutes. Explain how the Domain Name System (DNS) and IP addressing system work. A domain name is the English-like name that corresponds to the unique 32-bit numeric IP address for each computer connected to the Internet. The Domain Name System (DNS) converts IP addresses to domain names so that users only need to specify a domain name to access a computer on the Internet instead of typing the numeric IP address. DNS servers maintain a database containing IP addresses mapped to their corresponding domain names.

Schools|Webster University

Departments in Webster University

BUSN

BUSN

Popular courses from Webster University

Popular documents from Webster University