IDS 200 Quiz: Test 2 Review

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University of Illinois, Chicago
Information &Decision Sciences
IDS 200
Fyfe John

IDS 200 – Fall 2016: Test #2 Review Chapter Extension 3 – Mobile Systems Mobile Systems - Information systems that support users in motion. Mobile System’s Four Major Elements 1. Users in 2. Mobile 3. Wireless Connectivity 4. Cloud-based Resources Motion Devices User Interface (UI) - The presentation format of an application that consists of windows, menus, icons, dialog boxes, toolbars, and so on, as well as user content. User Experience (UX) - Not only refers to the user interface (UI) but also the way the application affects the user’s emotions and motivation to continue to use the interface. Chrome - Visual overhead, such as menus, status bars, and scroll bars, in a computer display. Roaming - Occurs when users move their activities, especially long-running transactions, across devices. BYOD Policy - A statement concerning employees’ permissions and responsibilities when they use their own device for organization business. Mobile Systems’ Implications on Information Systems Thin (Web) vs. Thick (Native) Applications Quality Mobile User Experience Advantages/Disadvantages of Employees Using Mobile Systems at Work Six Common BYOD Policies Chapter Extension 5 – Database Design Data Model - A logical representation of the data in a database that describes the data and relationships that will be stored in the database. Akin to a blueprint. Data Design - The process of designing a detailed logical data model of a database. Entity-Relationship (E-R) Data Model and Diagram Entity - Something that the users want to track. Attributes - Describe characteristics of the entity. Identifier - An attribute or group of attributes whose value is associated with one and only one entity instance. Crow’s Feet - Lines on an entity-relationship diagram that indicate a 1:N relationship between two entities. (Vertical bars on a line means at least one entity is required in the relationship, while an oval means that an entity is optional.) One-to-Many Relationship (1:N) - Relationships involving two entity types in which an instance of one type can relate to many instances of the second type, but an instance of the second type can relate to at most one instance of the first. Many-to-Many Relationship (N:M) - Relationships involving two entity types in which an instance of one type can relate to many instances of the second type and an instance of the second type can relate to many instances of the first. Maximum Cardinality - The maximum number of entities that can be involved in a relationship. Minimum Cardinality - The minimum number of entities in a relationship. Three steps to transforming Data Models to Data Designs: Normalization - The process of converting poorly structured tables into two or more well-structured tables. The goal of normalization is to construct tables with a single theme or entity, while minimizing data integrity problems. Represent Relationships: 1:N & N:M Relationships Foreign Key for 1:N Relationships - To represent a 1:N relationship, a foreign key (primary key to another entity table) is added to the related entity to establish their relationship. Intersection Tables for N:M Relationships - To represent a N:M relationship, an intersection table (simply a third table using an identifier from each of the involved entities) is created and filled with the various relationships between the attributes of the entities. Create numeric identifiers (if necessary) - Using numerical identifiers instead of actual words or phrases can help avoid data integrity problems. By substituting certain identifiers it can avoid instances of repeated data or data that has two different identifiers with the same meaning. User’s Role - Users are the final judges as to what data is contained in the database and how the records in that database should be related to one another. Users need to thoroughly review the data model. Chapter Extension 8 – Network and Cloud Technology Computer Network - A collection of computers that communicate with one another over transmission lines or wirelessly. Local Area Network (LAN) - A network that connects computers that reside in a single geographic location on the premises of the company that operates the LAN. The number of connected computers can range from two to several hundred. Wide Area Network (WAN) - A network that connects computers at different geographic locations; computers in two separated company sites must be connected using a WAN. “The Internet” vs internet - An internet is a private network of networks; they can connect LANs, WANs, and other internets. “The Internet” (always an uppercase “I”) is the public collection of networks. Intranet - A private internet used within a corporation or other organization. Protocol - A set of rules that programs on two communicating devices follow. Wired Connections Wireless Connections IEEE 802.3 Protocol IEEE 802.11 Protocol - A Bluetooth - A common (Ethernet) - A standard for standard for packaging and wireless protocol designed for packaging and managing managing traffic on wireless transmitting data over short traffic on wire local area local area network. Allow for distances, replacing cables. networks. Allow for transmission speeds up to Usually used to make transmission at a rate of 10, 1.3 Gbps. Personal Area Networks 100, or 1000 Mbps. (PAN) connections. LAN devices Router - A networking device that forwards data packets between computer networks. Switch - A computer networking device that connects devices together on a computer network, by using packet switching to receive, process and forward data to the destination device. Access point - A station that transmits and receives data, connecting users to other users within the network. Internet Service Provider (ISP) - An ISP provides a user with a legitimate Internet address; it serves as the user’s gateway to the Internet; and it passes communications back and forth between the user and the Internet. ISPs also pay for the Internet. They collect money from their customers and pay access fees and other charges on the users’ behalf. Digital Subscriber Line (DSL) - A communications line that operates on the same lines as voice telephones, but does so in such a manner that its signals do not interfere with voice telephone service. Cable Lines - Cable television lines that provide high-speed data transmission. WAN Wireless Connection - A communication system that provides wireless connectivity to a wide area network. Packets - A formatted message that passes through networks. Hops - In an internet, the movement from one network to another. Net Neutrality - The idea that all data should be treated equally as it passes between networks regardless of its type, source, or quantity. Public IP Addresses - An IP address used to identify a particular device on the Internet. Such IP addresses are assigned to major institutions in blocks by the Internet Corporation for Assigned Names and Numbers (ICANN). Each IP address is unique across all computers on the Internet. Private IP Addresses - A type of IP address used within private networks and internets. Private IP addresses are assigned and managed by the company that operates the private network or internet. IPv4 vs IPv6 - IPv4 is the most commonly used Internet layer protocol; it has a four-decimal dotted notation, such as “” IPv6 is another Internet layer protocol that uses 128-bit addresses and is gradually replacing IPv4. ICANN (Internet Corporation for Assigned Names and Numbers) - The organization responsible for managing the assignment of public IP addresses and domain names for use on the Internet. Each public IP address is unique across all computers on the Internet. Domain Name - A worldwide-unique name that is affiliated with a public IP address. Several domain names can point to the same IP address, and the affiliation of domain names with IP addresses is dynamic. Uniform Resource Locator (URL) - An address on the Internet. Commonly, it consists of a protocol, such as “http://” or “ftp://” followed by a domain name or public IP address. Three-tier Architecture: User Tier - Consists of users’ computers, phones, other devices that have browsers that request and process Web pages. Server Tier (Web Servers and Commerce Servers) - Consists of computers that run Web servers and applications, and in the process generate Web pages and other data in response to requests from browsers. Web Servers are programs that run on a server-tier computer and manage traffic by sending and receiving Web pages to and from clients. Commerce Server is an application program that runs on a server-tier computer; their functions are to obtain product data from a database, manag
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