module 1.3 Flashcards
what is memory?
Where the computer holds all the programs and data it is busy on.
Memory only keeps its contents while it is supplied with power
what is RAM?
RAM is memory
comes in sticks called DIMMs(dual inline memory modules
how is RAM measured?
measured in the low gigabytes
what is memory usually referred to as?
primary storage
and storage as secondary storage
what is storage?
where programs and data are kept permanently
anything you want to keep or save for later must be saved to storage
how is storage organised?
stored in files organised into folders.
how is storage measured?
measured in gigabytes or low terabytes
types of storage media
hard drive
flash drive
SSD
CD
DVD
what is an SSD?
Solid State drive
a completely electronic alternative to a hard drive
What technology does an SSD use?
The same technology as a flash drive
Difference between memory and storage
MEMORY
holds data and programs while it is on and working
electronic
fast to access
STORAGE
holds data and programs more peramanently
magnetic or electronic
slow to access
what is online storage?
refers to disk space allocated to you on a server on the internet
what do many companies offer in online storgae?
small capacities of storage such as 2 GB, and it is free.
how do you access online storage space?
all you need to do is log in with your computer with a username and password.
what is the online storage companies responsible for?
Creating backups to protect your data so that no one can access it
Advantages of online storage
-accessible anywhere on any device with an internet access
-saves space on the computer
-easy to share files
Disadvantages of online storage
-only accessible with an internet connection
-you pay for bandwidth
-you have no control over backup and security
what does cloud computing mean?
actual programs run on a server on the internet and you access those programs through your web browser
what does it mean when you say you keep your data in the cloud?
means your data is out there somewhere on a server on the internet
examples of online storage facilities
dropbox
google drive
icloud
what does backing up mean
involves making copies of your data and storing it in a different place from where you keep your computer
why do we back up?
to prevent data loss in case of an acccidental deletion or if your computer gets stolen
what matters when you make a backup?
-its quick and easy to make a backup
-its easy to restore the data
most popular backup strategy
-flash drives
-portable hard drives
-online backup services
