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What are the three common storage technologies?
Magnetic, Optical, and Solid State
File sizes and disk storage capacity are measured in ______.
bytes
One byte is ____ ______ ______.
eight binary digits (bits)
A binary digit is either a _____ or a _____ and is the _____ _____ of _____ on a computer.
one
zero
smallest unit
storage
Most files are measured in _______ or ______.
kilobytes
megabytes
Storage devices are measured in ______ or _______.
Gigabytes
Terabytes
What’s Kb, Mb, Gb, Tb?
Kilobit, Megabit, Gigabit, Terabit
The lowercase b indicates: bytes or bits?
bits
1 byte =
8 bits
Storage is described in _______.
bytes, such as 100GB
True or False: Data transfer rates are usually described as a certain number of bits per second, as in 1 Gbps.
True
These days most _____ is stored on magnetic, optical, and solid-state _______ _______.
data
storage devices
True or False: All storage devices are internal.
False, most of them are internal but there are some external
What does HDD stand for?
Hard Disk Drive
What is a Hard Disk Drive?
it’s a sealed metal cartridge with a stack of metal platters inside
What’s this?
the inside of a hard disk drive
Once HDD platters spin up, they spin at a constant ______ ______.
rotation speed
What does CD stand for?
Compact Disc
What does DVD stand for?
Digital Versatile Disc
What does BD stand for?
Blu-ray Disc
What is a Optical Storage Device?
A device that uses light to store and retrieve data on optical media.
What is a Solid-State Storage?
A type of computer storage that uses electronic circuits to store data.
True or False: A solid state storage uses nonvolatile (flash) memory that can retain data when powered down.
True
What does local storage mean?
It means it is physically connected to the individual computer accessing it. It is always available on that device, fast, and convenient.
What is Network Storage?
It is connected to the LAN to share files with other devices on the same LAN.
True or False: Businesses use network storage extensively to make sure all employees have access to important data and applications. A computer can access network storage only as long as it remains connected to the network.
True
What if devices aren’t on the same network?
you turn to online storage, one form of which is cloud storage, where the files are available anywhere in the world via the Internet.
What does DAS stand for?
Direct Attached Storage
Local storage also called a ______ _____ _______.
direct attached storage
What is local storage?
it has a direct internal or external connection to the device accessing it.
Where are internal storage devices physically located?
inside the main case of the computer
What’s this?
A SATA power cable
What is SATA used for?
it’s a technology that connects storage devices to a computer’s motherboard. It’s used to connect hard drives, solid-state drives, and optical drives.
What’s this?
A SATA data cable
What’s this?
A Molex Connector
What is a Molex connector?
is a pin and socket connector that’s used to supply power to devices.
External storage connects to ______ _______.
external ports.
Networked computers called ______ are dedicated full time to assisting other computers.
servers
Email servers are meant for
storing and forwarding emails
What are authentication servers for?
They manage user identities
What are web servers for?
they respond to requests for web pages
What do file servers do?
They grant users access to the server’s local storage
What happens when users connect to the file server?
They can view and edit files that they have permission to use.
What does RAID stand for?
Redundant Array of Inexpensive Disks
What does RAID technology do?
It combines more than one physical drive working together to improve performance or protect against data loss.
What does NAS stand for?
Network-Attached Storage
What does NAS do?
It typically describes a simple stand alone device that contains one or more hard drive slots, a pared down file server and a network connection.
Whats this?
a network attached storage appliance
True or False: You don’t need a file server or NAS appliance to share files on a LAN.
True
True or False: An ad hoc network connects devices directly without any “infrastructure“
True
What are three types of online storage?
Cloud, FTP, and Web-based
What is cloud computing?
Is the use of applications or data storage accessible over the interent
How would a smart phone user use the cloud?
They would normally store contact lists and documents such as photos in the cloud. This way when you get a smartphone, all of these items are available to the new phone as long as you sign into your cloud account.
What are some free cloud storage services?
iCloud (Apple), Dropbox, and Google Drive
What’s FTP stand for?
File Transfer Protocol
What is FTP?
is one of the oldest types online file sharing. It’s a simple way to move files from one place to another.
Is FTP secure or not?
It is not secure, it can require a login, but it sends the credentials and any files you transfer in the clear without encryption where anyone watching can see them.
True or False: Developers created multiple secure versions of FTP.
True
What protocol do regular / insecure websites use?
HTTP aka Hypertext Transfer Protocol
What do protocol do secure websites use?
HTTP over SSL aka HTTPS
What does SSL stand for?
Secure Sockets Layer