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55 Cards in this Set
- Front
- Back
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Define MIS
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The development and use of information systems for business objectives
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What is the five-component framework?
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Hardware-Software-Data-
Procedures-People |
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What are the characteristics of information?
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Derived from manipulation of meaningful data.
Relevant, Timely, worth its cost, accurate |
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What is the the relationship between IT and IS?
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IT creates the products, methods, standards, inventions to produce information
IS implements the systems and drives development |
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What is Moores Law>?
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Moores Law states that the number of transistors per square inch on an integrated chip doubles every 18 months, and as a result the speed of the chip also doubles
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How can an IS create a competitive advantage?
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It can create a new product or service, enhance products, differentiate, lock in customers, lock in suppliers, raise barriers to market entry, establish alliances, reduce costs
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How do IS facilitate decision making?
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Operational systems [Transaction Processing S]
Managerial systems [Managerial Information S] Strategic systems [Exectutive Information S] |
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What is a structured process?
What kind of system is used? |
Automated: understood and accepted method for making the decisions, computer does most the work
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What is a un-structured process?
What kind of system is used? |
Augmented: no agreed on decision making process, humans do most the work
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What is a general purpose computer?
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they can run different programs to perform different functions.
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What is a special purpose computer?
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Fixed permanently in memory, serve a specific purpose,
ex: cell phone computer |
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Name the hardware: Input, Processing, Output, Storage, Communication.
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-Keyboard, Mouse,
-CPU Ram -Display, speaker, printer -tapes, optical disk, magnetic disk -NIC card, router |
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What does the memory do?
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Memory holds instructions, holds data, and holds operating system
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What does Volatile mean?
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it means that when the computer is powered off the memory is lost, RAM is volitile memory, while the hard disk is nonvolitile
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What does the CPU do?
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the brain, reads data and instructions from the memory, processes them, and then returns results
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What is an instruction set?
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the collection of instructions that a computer can process
pc, mac |
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What does the OS do?
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manages main memory, processes keystrokes, reads and writes disk files, sends signals to the display
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Can you increase memory speed?
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No
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What is memory swapping?
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When you run out of memory and the computer must swap unused processes to main memory. Slows down the computer
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What is horizontal hardware?
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it is an all purpose application software, like office
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What is verticle software?
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Serves the need of specific tasks, or industry. Like Micros
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How many bits in a byte?
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8
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How many bytes in a KB?
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1024
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How many KB in a MB
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1024KB
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what does 01000001 equal?
what does 111 equal? 101? |
=2^0+2^6 = 65
=2^0+2^1+2^2=7 =5 |
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What are the components of a database system?
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Database:Tables relationsships among rows, metadata
DBMS: manages system DBAPPS: forms , queries, reports |
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What are the columns called?
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fields
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What are the rows called?
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records
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What is a foreign key?
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a non-key field in one table that links to a primary key in another table
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What is an entity?
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What you want to track, becomes the "tables" in your database
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What is normalization?
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the process of converting poorly structured tables into two or more well-structured tables
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How do you place keys for 1:1, 1:N, and N:M relationships?
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1:1= fkey can go a:b or b:a
1:M= 1 is fkey of Many N:M= create a seperate key table |
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What is a database?
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a self describing collection of integrated records
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What is a network protocal?
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a standard means for coordinating an activity between two or more entities
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What protocal do we use?
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TCP/IP-OSI
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Layer 5
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application layer: http-ftp-smtp> governs how applications work together
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Layer 4
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Transport: TCP unifies communcation, breaksdown messages into segments, then packages "envelope to and from" the segmetns
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Layer 3
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IP: routes packets across an internet
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Layer 2 & 1
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IP to MAC adress> packeges packets into frames
Segments>packets>frames |
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What is a LAN?
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a group of computers connected together on a single site
NIC>Switch<NIC NIC> <AP------WNIC |
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What is the most used LAN protocal?
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Ethernet
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What layer does ethernet operate at?
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1 and 2
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What is a WAN?
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Wide area network: connects computers located at physically separated sites.
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What is a PSDN? Why would I want to use one?
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A public switch alternative, a WAN alternative=
each site leases a line, once a site has connected to the psdn "pop" point of presence, the site obtains access to all other sites connected. Reduces costs as they dont have to pay for entire network |
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What is a VPN?
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Virtual Private Network: uses the public internet to create the appearance of a private connection. Creates a "secure" encrypted tunnel.
* Offer the benefit of point to point leased lines |
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What are some of the criteria for comparing alternatives?
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Setup costs, operational costs, maintenance costs, speed latency, availability, lossrate, performance
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What is the DHCP?
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Dynamic host configuration protocol: allocates ip in a lan
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What do switches work with, and at what layer?
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Frames, at layer 2 using mac adresses
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What do routers work with, and at what layer?
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Packets, at layer 3 using ip addresses
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What is DNS?
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domain name system: changes "names" to ip
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What is NAT?
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Network Address translation: changes public ip adresses to the private ip addresses located on the lan
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What is CRM
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Customer relations management system: sales management, customer support
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What is ERP?
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Enterprise resource planning: integrates all of the organizations principal processes.
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What is EAI?
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Enterprise application integration: conects system "islands" via a new layer of software
Enables a gradual move to ERP |
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What are three kinds of information systems?
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Calculation, functional, andintegrated systems.
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