BTE EXAM 1

software as a servicde

"lazy persons service" apps are located in the cloud and experiences are delivered through the internet (ex. Google drive)

network types

PANs; LANs; WANs

read-only memory (ROM)

ROM is nonvolatile, so it retains instructions when power is off

software suite

a collection of computer programs of relatively similar user interface and the ability to easily exchange data with each other (adobe, Microsoft office)

input technologies

accept data and instructions and convert them to a form that the computer can understand (keyboard, mouse, etc)

W-LAN (wireless LAN)

access point: bridge between wired network and the wireless device ESSID: name of wireless network Hotspot: area covered by wireless access points

supercomputers*

always the fastest computer available for that point in time

network speeds

bandwidth; broadband

data measures

bit; byte; kilobyte; megabyte (song); gigabyte (movie); terabyte (video files); petabyte; exabyte; zettabyte

short-range wireless networks

bluetooth: allows devices to communicate over short distance using radio waves

fat-client*

by itself; can use it without internet

coaxial cable

carries data across long distances; used for internet, cable TV, etc

twisted-pair wire

cheapest; consists of pairs of wires; very prevalent in connecting computers, TV, etc

platform as a service

cloud providers offer an internet-based platform to developers who want to create services but don't want to build their own cloud

infrastructure as a service

cloud users rent storage, computation and maintenance; users don't deal with hardware and all appliance is moved to the cloud

hybrid cloud

composition of two o more clouds that remains unique entities but are bound together

open-source software*

computer software who's source code is available under a license that permits users to study, change, and make improvements

local area networks (LANs)

connects a group of computers or other small devices in a small area (used to share resources)

application software

consists of instructions that direct a computer system to perform specific information-processing activities

wide area networks (WANs)

covering large geographical areas connecting smaller networks together

secondary storage

ex. solid state drivers (SSD); flash memory (memory cards)

fiber optics

fastest of the three; transfers data across long distances without signal loss

network infrastructure

foundational layer that enables us to communicate and transfer data

dematerialization with smartphones

functions of many physical devices are included in one physical device

application software

helps us accomplish certain tasks; WE interact with it

satellite

high-bandwidth; large coverage area; expensive; requires unobstructed LOS

cache memory

high-speed memory that enables the computer to temporarily store blocks of data that are used moe often

microcomputer

laptops; tablets; wearable clients

advantages of cloud computing

lower costs; improved performance; instant updates; increased data reliability

central processing unit (CPU)

manipulates the data and controls the tasks performed by the other components

cloud computing

method for delivering business and IT services enabling businesses and users to acquire the IT resources they need

types of clients

microcomputers; thin-client; fat-client

linux

open-source family of operating systems installed on a variety of computer hardware

register memory

part of the CPU; storing limited amounts of instructions only right before and after processing

communications channels

pathways used to transfer data across media

communications media

physical medium used to transfer data from one point to another (3 types)

output technologies

present data and information in a form people can understand

communications technologies

provide for the flow of data from external computer networks to the CPU and from the CPU to computer networks

operating systems (OS)

provide user interface; manages systems memory; manages files

public cloud

provisioned for open use of the public by a particular organization who also hosts the service (ex. iCloud)

the internet of things IOT

refers to a network of physical devices that are embedded with technologies to connect and share data over the internet

types of primary memory

register memory; cache memory; random access memory; read-only memory

disadvantages of cloud computing

requires constant internet; does not work well with low-speed connections; features might be limited

types of computers

serves and clients

community cloud

shared by several organizations

personal area networks (PANs)

short range (abt 30 feet); used almost everyday w phone, bluetooth, airdrop

cloud computing =

software as a service + platform as a service + infrastructure as a service

proprietary software*

software that has been developed by a company and has restrictions on its use and modification (modifications only contracted with the developing company)

personal application software

stand alone program designed for a specific purpose (photoshop, spreadsheets)

secondary storage*

stores data and programs for future use

types of servers

supercomputers and mainframe computers

broadband*

telecommunication signal of greater bandwidth

primary storage*

temporarily stores data and program instructions during processing

primary memory (main memory)

the CPU can directly access primary storage without needing additional devices

computer hardware

the physical equipment used for the input, processing output and storage activities of a computer system

software

the programs and other operating information used by a computer

examples of IOT in use

the smart home; healthcare; automotive

systems software

the software that makes everything run smoothly by interacting with the hardware

bandwidth*

transmission capacity of a network (rate of data transfer; how much potential speed)

wireless transmission media (broadcast media)

transmits signals without physical wires

private cloud

used for a single organization

microwave transmission systems

used for high-volume, long-distance; requires LOS; susceptible to interference

infrared

utilizes infrared light; used for short distance; requires LOS

random access memory (RAM)*

where the computer stores info you need right now

medium-range wireless networks

wireless fidelity (wifi): allows devices to connect to the internet using radio waves wireless mesh networks: uses multiple WIFI access points to create a wide area network that can be quite large

thin-client*

worthless by itself without the internet