Chapter 4: Data Storage and Sharing

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.

1. one

2. zero

3. smallest unit

4. storage

Most files are measured in _______ or ______.

1. kilobytes

2. megabytes

Storage devices are measured in ______ or _______.

1. Gigabytes

2. 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 _______ _______.

1. data

2. 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