IST 195 Exam 1 Review
IST 195 Exam 1 Review IST 195 - M001
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Popular in Information technology
This 3 page Study Guide was uploaded by Ryan Ratty on Sunday October 4, 2015. The Study Guide belongs to IST 195 - M001 at Syracuse University taught by J. Rubin in Fall 2015. Since its upload, it has received 198 views. For similar materials see Information Technologies in Information technology at Syracuse University.
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Can you just teach this course please? lol :)
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Date Created: 10/04/15
IST 195 Ryan Ratty 9302015 lST 195 Exam 1 Review Lecture 1 MOOC Massive online open course Ex Coursera Showrooming In a physical store looking for better prices online on phone Lecture 2a Howard Aiken Harvard professor that created the Mark 1 in 1944 Huge computer Mark 1 Supercomputer created by Howard Aiken in 1944 305 RAMAC Came in 1956 IBM Supercomputer held 5 MB of storage Moore s Law Observation made in 1965 that the number of transistors on an integrated circuit will double every 24 months and cost per transistor decreases Types of Computers PC Server Mainframes Super Computers Embedded PC Personal computer Windows and Mac Server Serving out information via webservermainframe Mainframes Banks use these Supercomputers capable of processing more than one quadrillion instructions in a single com puter Embedded a specialpurpose computer that functions as a lightweight component in a large product Lecture 2b 4 main computing functions Access process reduce store Motherboard CPU Brain of the computer measured in hertz mega or giga contains control unit ALU unit registers Control Unit vs ALU Transistors Nanotechnology the study of manipulating matter on an atomic or molecular level RAM Holds data and instructions waiting for processing by the CPU temporary storage con tents are deleted when computer is powered down CPU Memory Cache speeds the processes of the computer L1 is the fastest for communica tion Traditional Hard Drives vs SSD THD SSD No moving parts less susceptible to shock no noise reduced access time more expen slve Lecture 3a Bit vs Byte Binary digit 5 bits 32 values 6 bits 64 values Decimal vs Binary Decimal is Base 10 there are ten digits probably because we have ten fingers Binary is Base 2 we only have 1 s and 0 s Storage Capacities outlines the quality of service that a storage system can deliver Binary Arithmetic arithmetic operations based on binary numbers IST 195 Ryan Ratty 9302015 ASCII vs UNICODE ASCII is 7 bit or 128 values this takes care of 09 AZ az and punctuation English only UNICODE Universal language set more than 100000 characters Lecture 3b RFID Technology Radio Frequency Identification made of chip RFID reader system behind it can be mounted on plastic cotton and paper measured in millimeters Passive vs Active Tags Passive does need battery power activates itself and transmits data using power generated by the radio waves from the RFID reader usually less than 3 meters Active it is battery powered has an improved RFID vs Barcode RFID Require line of sight to be read can only be read individually cannot be read if damaged or dirty Barcode Can be read without line of sight Multiple tags can be read simultaneously can cope with harsh or dirty environments BTLE Bluetooth Low Energy continuous low power connection indoor GPS alternative iBeacons Protocol introduced by Apple and now supported by iOS 7 Android Blackberry A technology that Apple built on top of BTLE protocol Lecture 4a People behind Operating Systems Bill Gates Ken Thompson Steve Jobs Linus Torvalds Functions of Operating Systems sleep mode and hibernation mode Types of OS s Realtime singleuser multiuser embedded SleepHibernate Sleep Saves data to RAM Hibernate Saves data to hardrive Open source Source code is published and made available to the public who can copy modity and redistribute without paying royalties or fees LINUX vs UNIX LINUX developed by Torvalds in 1991 resembles UNIX but was developed independently UNIX Operating system developed in the late 1960s for servers Lecture 5a Operator procesure a series of Visual Basic statements that define the behavior of a standard operator Formulas vs Functions Formulas 6 2 Functions Average SUM Count IF Conditional Formatting Making something a specific color based on criteria VLOOKUP a database function that creates lists of things in an Excel worksheet Pivot Tables Quickly analyzes a boatload of data Delimited Files Textual information separated by a certain character IST 195 Ryan Ratty 9302015 Lecture 5b Big Data A plethora of data being collected and warehoused websites emails ecommerces The Four V s of Big Data 4 Types of Data Volume how much we re talking about Velocity how quickly it s coming in variety where are all of these data sources coming from veracity how accurate the data is ARPANET Packets With packet switching messages are separated into small units Protocols HTTP SMTP SSL TCP IP a set of rules to be followed in a specific situation Domain Names used to identify computers available through the Internet IP Addresses addresses are numeric commonly used by computers to refer to other computers DNS domain name systems where the IP address is looked up IPv4 vs IPv6 IPv4 Have four parts separated by periods IPv6 Have six parts separated by colons in order to have significantly more unique addresses ICANN Internet Corporation for Assigned Names and Numbers coordinates activates related to the Internet s naming system WIPO one of the 17 specialized agencies of the United Nations created in 1967
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