ITF+ 1.0 IT concepts and Terminology
What are gigahertz? (GHz)
1 GHz = 1,000,000,000 cycles per second or 1000 MHz Almost all processors used in PCs over the last decade run at speeds exceeding 1 GHz
What are gigabit per second commonly used for? (GBPS)
1 Gbps = 1000 Mbps Used to express speeds of very fast internet and LAN Connections ( Giga Ethernet and 10G Ethernet) and the speed of high performance device interconnects such as USB 3.1 Gen 1 (5 Gbps), USB 3.1 Gen 2 (10 Gbps), and SATA Revision 3 (6Gbps)
What are kilobit per second commonly used for? (KBPS)
1 KBPS = 1000 bps KPBS used to measure speeds of low-performance DSL internet connections
What are Megabit per second commonly used for? (MBPS)
1 MBPS = 1000 Kbps used to measure speeds of high-speed and broadband internet connections such as: LAN connections, I/O devices such as USB 1.1 and USB 2.0 and Firewire
What are Megahertz? (MHz)
1 MHz = 1,000,000 cycles per second or 1,000 KHz Used to measure I/O bus clock rate used in memory modules
What are terrabyte per second commonly used for? (TBPS)
1 Tbps = 1000 Gbps Used to measure speeds between country's and regions
What is a megabyte?
1000 Kilobytes 1,048,576 bytes (1024 KB) in powers of 2 1,000,000 bytes in the power of 10 Ram is often expressed in the powers of 2 decimal method
What is a gigabyte?
1000 Megabytes 1,000,000,000 bytes
What is a Kilobyte?
1000 bytes in decimal powers of 10 1024 bytes in decimal powers of 2
What is a terabyte?
1000 gigabytes 1,000,000,000,000 bytes
What is a petabyte?
1000 tetrabytes 1,000,000,000,000,000 bytes Used in cloud storage or backup systems
How many bits are in a nibble?
4 bits
What is a byte?
8 bits 1 byte = 2^8
What is data capture and collection?
Process of determining exactly what type of data is to be captured for collection so that this can be properly analyzed and/or stored for future reference What type of data do you want to capture?
What is meaningful reporting?
Providing information needed to help an organization make an informed decision Condenses all raw data to create useful info If you are giving a meaningful report. get straight to the point
Explain what data and information as assets mean
Something like a social security number Most important asset easily stolen
What is data correlation?
Statistical association, or close relationship, between two or more items. commonly refers to the degree to which a pair of variables are linearly related Example: Price of a house & income of a buyer
what is a bit?
The smallest unit of information consisting of either a 1 or a zero.
What is a decimal notation?
a form of a number using a decimal point
What is a string?
a sequence of characters enclosed in quotation marks
What is a trademark?
a symbol, word, or words legally registered or established by use as representing a company or product.
what is a digital product?
any virtual item you can pay for, and download instantly. E-books Downloadable music logos photos
explain what a float is?
can be used as a string or integer.
what are bits per second commonly used for? (BPS)
common measure of data speed for computer modems and transmission carriers speed of BPS = the number of bits transmitted or received each second BPS was mainly used to measure speeds of early dial-up (analog) modems
explain how important to invest into security?
first off it protects internet connections. inbound and outbound connections email transfer and etc. its important because data is extremely valuable to organizations that have a right to the data and those who do not have a right to access the data 3 Considerations - Cost-benefit analysis - Return on investment - Total cost of ownership
What is a patent?
having the right to something for a certain period of time
What is copyright?
protection of written material or ideas Book, Movie, Website
what is a char
single character
What is a Boolean?
true or false value
What is a integer?
whole number Positive or negative numbers
Explain the Relationship of data to creating information
Data - Raw unprocessed information Information - is processed from data Example: 123456789 - Raw data 1234-56-789 information
Different types of storage?
HDD, HD, SDD
What is an input device?
Keyboards, mouse, camera,
What is a storage unit?
Meassures the capacity of premanent storage, including magnetic, optical, and flash memory drives read-only memory (ROM) Random-access memory (RAM AKA temporary storage)
What is a throughput unit?
Measure the speed at which data is transferred between endpoints such as the internet to a broadband modem or from a hard drive to a computer. Uses power of 10
What is an output device?
Monitor, printer, speakers, HDTV's, Tablet/smartphone screens, projectors
What is a Unicode?
A standard for representing text in numerous alphabets and other writing systems *Uses Latin and non latin* *UNIVERSAL*
What is ASCII?
American Standard Code for Information Interchange 7 bit code that can hold 128 Characters represent text in computers, telecommunications equipment, and other devices
What is hexadecimal?
Base 16. Hex uses characters 0 through F.
What is binary?
Base 2. Binary uses characters (numbers) 0 and 1 only.
different types of processing
CPU, Memory, motherboard, GPU
What are processing speeds?
Clock speed: Speed at which a microprocessor executes instructions Number of cycles a processor can perform per second controlled by a crystal oscillator clock chip on motherboard. Each combination of a pulse and rest is a clock cycle