Lecture Slides

imissyou419's version from 2017-03-04 06:46

Section 1

Question Answer
not all information systems requirecomputerization (i.e. public library with Dewery decimal system, calendar)
basic business use (information systems)email, accessing web pages, word processors & spreadsheet software, creating presentations, instant messages; NOT ENOUGH TO JUST USE THESE TOOL BUT MUST INTEGRATE & MAXIMIZE)
Amazon.cominnovated use of the internet, 1 of the first to sell goods over the internet, began as an online bookstore but now sells more
Gmail supported by advertising (able to scan email and understand its content)
ICT job 2.0 reportdavid ticoll suggests that within the next decade: unlimited storage will be almost free, analytical software will reveal hidden treasures, collisions of the real and virtual world, as wide-area networks become cheap, reliable, widely available, technology will enable deep, powerful, performance-enhancing innovations

Section 2

Question Answer
Porter's 5 forces determinescharacteristics of the industry, profitability, sustainability of the profits
Competitive advantage examplesRoyal bank & ATMs, RIM & Blackberry, Microcomputers: Microsoft, Intel, Apple, Oracle, Del, Wireless Tech: RIM, Social Networking: FB
Organizational strategyindustry structure, competitive strategy, value chain, business processes, information systems (nature of the business processes determine structure of IS)

Section 3

Question Answer
What is in a traditional computer?***Central processing unit (ALU, program counter), memroy, peripheral (input devices, output devices), secondary memory, power source
Hard disk memorypermanent, big and slow, need to physically move to retrieve and save info (unless it's solid state)
RAM memorymain memory; FASTER, HOLDS LESS, disapears when you shut off computer, made of switches that are either 0 or 1, holds programs currently executing
Main processors - CPUcentral processing unit, 'core', micro chips
Hard drive (Magnetic disk)provides long term storage, storage capacity affects memory, data recorded in concentric circles, disks spin & read/write heads move in/out, time required to read data depends on: rotational delay, seek time
Hard drive (solid state)computer chips - memory storage
Optical diskCDs, DVDs, data stored differently, different capacities & speed, ROM, R = record data once, RW = rewritable
Video displays 2 typesCRTs (cathode ray tubes) - big and bulky; LCDs (liquid crystal display) - slimmer
Cloud computing builds on the concept ofgrid computing (several computers use to address a single problem at the same time)
Cloud computingpay for what you use
Unix major vendorSun Microsystem (Unix is developd by Bell Labs, scientific & engineering community)
Dual category examplesMaterial requirement planning, enterprise resource planning
Example of wormslammer, it "choke" networks making them unusuable
Zombies useused by spammers to send email

Section 4

Question Answer
Communication networks collection of computers
communication networks communicate via transmission mediaphysical: copper, optic fiber; wireless; radio frequencies
Transmission line LAN controlled bycompany operating network
Transmission line WAN controlled bygovernment
Internet (network of networks)connect LANs, WANs, and other internets
SMTP email
FTPfile transfer protocol
URL contains info aboutprotocol used to access document (HTTP file transfer on WWW), address of a document including web server, folder, document (.html)
Protocols include:HTTP (http://), FTP (ftp://), SMTP (mailto:)
Which part of URL are case sensitive, which parts are not?web server part is not, folder & document parts are
Optic fiber cableST and SC connectors
WNIC operates bysending and receiving a Radio Frequency Signal to and from a router
Internet vs WebInternet: communications infrastructure, supports all application layer protocols (http, smtp, ftp); web: subset of the internet, consists of sites that use http, use browser to surf the web
TLD (top-level domains).ca, .com, .org, .biz
Logical IP address4 sets of numbers separated by periods
Dynamic host configuration protocol serverIP address assigned dynamically, tempory IP address assigned while connected to LAN, reassigns as needed
Windows TCP/IP protocol toolsipconfig/all
UNIX/Linux/OSX TCP/IP protocol toolsifconfig
Dial up modemsdial ISP for connection, max transmission speed = 56 kbps, interferes with voice telephone service
cable modem usesoptic fiber through (coaxial cable = cable line) rather than twisted pair unlike telephone line
Broadbandtransmission speeds >256 kbps, narrowband (dialup) <56 kbps
messages & attachments are broken into pieces calledpackets
Arpanet1st packet switching network, provided access to many geographically separated computers
Packet switchingmsgs broken into packets, numbered and sent individually, reassembled, if lost then resend request (benefit: speed, reliability, error correction)
Web 1.0flat, non-interactive, Information retrieval mechanism
web 2.0interactive - multi-purpose, user content vs. user interaction, e-commerce
Archie1st search engine (1990)
search engines vs. web crawlersearch engines search info on internet, requires URLs and storage/retrieval method; webcrawlers browse the web to find URLs
Search engine indexingindex creating for the results from web crawling
Phishing vs ransomwareemail; browser locked
Router 2 IPsprivate address for local traffic, assigned by manufacture, used for internal routing; public address for internet traffic, provided by ISP, valid on public internet