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Exam 2 - 439

Info - 439

QuestionAnswer
XML (eXtended Markup Language) is a language for describing data in a standardized way so that different applications can use the same data.
WSDL (Web based definition language) provides standard language for creating these descriptions so that they can be understood by Web Services requestors.
UDDI (Universal Discovery, Description, and Integration) the descriptions are stored in a UDDI registry, a yellow pages of Web Services.
SOAP (Simple Object Access Protocol) an XML-based communication protocol that works over any network and with any equipment
HTTP (Hypertext Transfer Protocol) web sites have addresses that use the protocol.
TCP/IP (Transmission Control Protocol/Internet Protocol) the internet is true to its name; it is a network because it uses a protocol that permits transmitting messages across networks.
What is IT infrastructure? the shared and reliable services that provide the foundation for enterprise IT portfolio.
What are the four layers of IT infrastructure? technical component, human IT, shared IT services, as shared and standard applications.
IT components the foundation of a firms IT infrastructure. It consists of technology components, such as computers, printers, DBMS packages and operating systems.
Human IT experts knowledge, skills, experience, and standards to bind IT components into services that business people can understand.
telecommunication is an electronic highway (an infrastructure). It facilitates the flow of information among individuals, work groups, departments, customer sites, regional offices, enterprises, and the outside world.
Digital Convergence the intertwining of various forms of media - voice, data, and video.
Layer 7: Application: identifies and establishes availability of communication partners.
Layer 6: Presentation:presents data in standard formats
Layer 5: Session: coordinates communication between nodes
Layer 4: Transport: ensures data integrity via TCP and multiplexing applications
Layer 3: Network(routers): packet routing based on IP addressing
Layer 2: Logical Link: switches are faster, not concerned with IP
Layer 1: Physical: wires
Goal of Wireless is to do everything we can do on wired, but without the wire.
Wireless Personal Area Networks (WPANs) connection between devices up to 30 ft. apart. ex. bluetooth
Wireless Local Area Networks (WLANs) used in organizations, homes, and public. ex. hotspots
Wireless Metropolitan Area Networks (WMANs) connections within cities up to 30 miles
Wireless Wide Area Networks (WWANs) broadband connections over thousands of miles
Extranet a special part of the intranet for use by trading partners, customers, and suppliers for online commerce.
Closed Network one that is offered by one supplier and to which only the products of that supplier can be attached
Open Network based on national or international standards so that the products of many manufacturers can attach to it.
Reference Model recommends the functions to be performed in each of the several layers; doesn't specify detailed standards for each group.
Data is facts devoid of meaning or intent
Database Management Systems are the tool for managing entities
External, Conceptual, or Local contains the various user views of the corporate data
Logical or Enterprise data level all organizations relevant data under the control of the data administration. data and relationships are represented.
Physical or Storage Level specifies the way the data is physically stored. data record consists of its data fields plus some implementation data, pointers and flag fields
Hierarchical Model each data element is subordinate to another.
Network model each data can have more than one parent. data relationships are stated explicitly, by pointers.
Relational Model relationships are stated by DBMS to find related items based on values of specific data.
Object Model expands the view of data by storing and managing objects.
Object Database a collection of objects
object data management techniques draw from the past. retain traditional DBMS features
Data administration created to manage all the computerized data resources of an organization. monitor all new definitions and all requests for changes in definitions to make sure that corporate policy is being followed.
Database Administration concentrates on administering databases and the software that manages them.
Data Dictionary main tool by which data administrators control standard data definitions
ERP provides the means to consolidate data to give management a corporate-wide view of operations. Gives a ready-made IT architecture.
Information is data in context, data has not been given an explicit meaning in specific context.
Record-based data contains mainly facts about entities. housed in data records.
Document-Based deals with concepts, such as ideas, thoughts, and opinions, and is housed in documents, messages, and video an audio clips.
Internal record-based was original focus of IS organizations, because its the type of information that computer applications generate and manage easily
External record-based can be accessed over the internet or through other electronic means via public databases.
Operational Databases are meant to be updated to hold the latest data on, say, a customer.
Data Warehouses are not updated as events occur, only on specific points in time.
What is the most common type of data? customer data, used to discover how to more effectively market to current customers as well as non-customers with the same characteristics.
Quality Data the biggest challenge. manual task, one of the latest warehousing team must perform.
Data Marts subsets of data pulled off the warehouse for a specific group pf users. Less expensive to build and easier to search.
Outsourcing turning over a firms computer operations, network operations, or other IT function to a provider for a specified time
Monolithic Outsourcing huge outsourcing contracts that involved almost entire IT operatinons
Transitional outsourcing choice of outsourcing of maintenance of legacy systems or development of new client-server systems. once new systems were brought in, legacy systems were shut off
Best-of-Breed Outsourcing selective outsourcing based on vendor specialty. Coordination is a challenge here
Shared Services consolidate all non-core activities to one shared services functional group to be sourced. Goal was to achieve efficiencies and save money
Business Process Outsourcing (BPO) outsourcing almost all or most of a reengineering process that has large IT component.
Utility Computing on-demand pricing model, pay for what you use.
Created by: JazminNava