Term
|
Definition
| knowledge and understanding of computer, and ability to use computer |
|
|
Term
|
Definition
| electronic device that operates under control of instructions that it stores in memory; it Accepts data, Processes data, and Produces results for future use. |
|
|
Term
|
Definition
|
|
Term
|
Definition
| outputs, what we have done with data that was processed, something meaningful and useful for humans. |
|
|
Term
| Information Processing Cycle |
|
Definition
1.Input
2.Process
3.Output
4.Storage |
|
|
Term
|
Definition
| Internet Service Provider |
|
|
Term
|
Definition
| Online Service Provider = internet+more (storage, email, community) |
|
|
Term
| IP (internet protocol) address |
|
Definition
| 4 series between 1-3 digits e.g. 72.14.207.99 |
|
|
Term
|
Definition
e.g. www.google.com
TOP LEVEL DOMAIN = category of website .com, .org, .edu, .gov, .net etc.\ |
|
|
Term
|
Definition
|
|
Term
|
Definition
| link or hyperlink - will bring you to another location |
|
|
Term
|
Definition
| collaborative website where users are allowed to create, add to, modify, or delete contents. |
|
|
Term
| Where are online shopping carts stored? |
|
Definition
| On personal computer until check out - unless have members |
|
|
Term
|
Definition
| electronic circuit-board that everything is attached to. |
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
1. (CPU)Fetching - Retrieve next instruction+data with that instruction from memory and bring it back.
2. (CPU)Decoding - Organize the instructions+ so that it is understandable to the processor
3.Executing (ALU takes over) - processing the instruction
4. (CPU comes back) Storing - takes result and moves it wherever its supposed to go |
|
|
Term
|
Definition
| Every "tick" is called a hertz - every time it "ticks" = time for next instruction. Clock speed are how fast it ticks. 4 gigahertz = 4 billion instructions per second! |
|
|
Term
|
Definition
KB - kilobyte
1000
MB - mega bytes -Million bytes
GB - gigabytes - a billion bytes
TB - terabytes - a thousand gigabytes |
|
|
Term
|
Definition
| Could be destroyed. Anything that was in this memory when computer turned off or lose power is gone. |
|
|
Term
| RAM - random access memory - Main memory - comes in 3 lvls: |
|
Definition
1. D-RAM - dynamic RAM - it's electronic, slowest of RAMs, needs constant energizers (power surges) to keep memory present, small
2.S-RAM - static RAM - also electronic, faster than DRAM doesn't need energizers as often and has a little more capacity
3. M-RAM - magnetic RAM - uses magnets instead of electricity - has greater storage capacity |
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
| Memory access times is measured in |
|
Definition
|
|
Term
|
Definition
| Universal serial bus - great cuz they're small, very fast, and able to process up to 127 USB connections at once - can stack on 127 on one port |
|
|
Term
| Buses - used to transfer data from point A to point B |
|
Definition
1. Frontside Bus (FSB) - connection b-t processor and main memory
2. Backside (BSB) - connection b-t processor to CACHE |
|
|
Term
|
Definition
| hard drive inside computer - used to store main stuff. |
|
|
Term
| How is hard disc made? How does it work? |
|
Definition
| Made up of platters arranged in layers on a spindle. Writing used to be longitudinal. It would be written across surface, but was taking up too much space. Instead goes into platter - perpendicular recording. |
|
|
Term
Pieces of hard disk platters:
Portion =
Contiguous sectors =
An entire ring of sectors = |
|
Definition
Portion = sector
Contiguous sectors = cluster
An entire ring of sectors = track |
|
|
Term
| One point through all platters on spindle = |
|
Definition
|
|
Term
|
Definition
Solid State Drive
1) Access time is about 80 times faster than hard discs
2) Transfer rates also faster
3) Since no movement generate less heat and use less energy
4) Life expectancy is about 50 years |
|
|
Term
|
Definition
| iggers POST (power on Self Test) makes sure everything (hardware wise) on and working. Goes to hard drive looks for OS and loads it into system. |
|
|
Term
|
Definition
| computer has already been on, but restarts. Just want OS to be reloaded. Kernel = core of OS, memory resident whole time computer is on the kernel is in memory (unlike say Word which is only in memory when in use) |
|
|
Term
Three types of Networks:
LAN
MAN
WAN |
|
Definition
1. LAN - Local Area Network - Network that connects computers and devices in a very limited geographic area, (a home, a computer lab, an office building)
2. MAN - Metropolitan Area Network - bigger area
3. WAN - Wide Area Network - Biggest area, the Internet is the biggest WAN. |
|
|
Term
|
Definition
| Digital Subscriber Line - A little faster and efficient and still used copper telephone lines |
|
|
Term
|
Definition
| Fiber To The Premises - Fiber Optic cable system - light passed through these fiber optic cables - verizon Fios. There is a giant under water cables in the oceans that connects the networks all over the world. |
|
|
Term
| T-carrier lines - Two types: |
|
Definition
a. T1 line: faster, every part of line can be split into 128 pieces each with full speed. Costs about $16,00 per month
b. T3 line: 28x faster |
|
|
Term
|
Definition
| Hardware that receives and sends data info |
|
|
