CHP. 6 Flashcards
Collaboration
Occurs when two or more people work together to achieve a common goal, result, or product.
Communication systems
mail, virtual private networks, instant messaging, and more sophisticated communications systems, dependent on the network technology available in an organization.
Workflow
A process or procedure by which content is created, edited, used, and disposed.
Network externality
The larger the number of people using a network, the more valuable that network becomes.
Global Positioning System (GPS)
A collection of dozens of satellites orbiting the earth that transmit precise microwave signals. A GPS receiver can calculate its position by measuring the distance between itself and several of the satellites.
Network
A collection of computers that communicate with one another over transmission lines.
Transmission media
Physical media, such as copper cable and optical fibre (glass fibre) cable, or wireless media transmitting light or radio frequencies (including cellular and satellite systems) which transmit electronic signals.
Optical fibre cable
A type of cable used to connect the computers, printers, switches, and other devices on a LAN. The signals on such cables are light rays, and they are reflected inside the glass core of the optical fibre cable. The core is surrounded by a cladding to contain the light signals, and the cladding, in turn, is wrapped with an outer layer to protect it.
Local area network (LAN)
A network that connects computers that reside in a single geographical 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 located at different geographical locations.
Internet
Either a private network of networks or, more commonly, the public network known as the internet.
Protocol
A standardized means for coordinating an activity between two or more entities.
Cloud
A term that refers to elastic leasing of pooled computer resources over the Internet.
Elastic
In cloud computing, the situation that exists when the amount of resource leased can be dynamically increased or decreased, programmatically, in a short span of time, and organizations pay for just the resources that they use. This term was first used in this way by Amazon.com.
Pooled
The situation in which many different organizations use the same physical hardware.
Over the Internet
When applied to cloud computing, the provisioning of worldwide servers over the Internet.
Service-oriented architecture (SOA)
A design philosophy that dictates that all interactions among computing devices are defined as services in a formal, standardized way. SOA makes the cloud possible.
Web service standards
Worldwide standards that programs use to declare what they do, the structure of the data they process, and the ways they will communicate.
Web services
SOA-designed programs that comply with Web service standards.
software as a service
Leasing hardware infrastructure, operating systems, and application programs to another organization.
platform as a service (PaaS)
Vendors provide hosted computers, an operating system, and possibly a DBMS.
infrastructure as a service (IaaS)
The cloud hosting of a bare server computer or data storage.
Content delivery network (CDN)
An information system that serves content to Web pages over the Internet. To reduce wait time, data is typically stored and served from many geographic locations.
Content delivery network (CDN)
An information system that serves content to Web pages over the Internet. To reduce wait time, data is typically stored and served from many geographic locations.
Virtual private network (VPN)
A WAN connection alternative that uses the internet or a private internet to create the appearance of private point-to-point connections. In the IT world, the term virtual means something that appears to exist that does not exist in fact. A VPN usually uses the public internet to create the appearance of a private connection.
Tunnel
A virtual, private pathway over a public or shared network from the VPN client to the VPN server.
Private cloud
In-house hosting, delivered via Web service standards, which can be dynamically configured.
Virtual private cloud (VPC)
A subset of a public cloud that has highly restricted, secure access.
M-commerce
Short for mobile commerce, its applications allow mobile phones to conduct certain kinds of transactions, such as mobile banking and mobile ticket purchases at movie theatres and sporting events.
