Network, Databases, Internet (Keywords)

Cloud computing

Using the internet to do things like access data, use apps and use power on servers instead of your own computer.

Internet

A network of computers all over the world, connected by a huge web of cables going over the sea and land.

Client and server

• Client: Starts the contact with the server.

• Server: Waits for the client to start the server to give a response.

TCP and IP (abbreviations)

• Transmission Control Protocol

• Internet Protocol

DNS (Domain Name System)

A phonebook of the internet, translating names into IP addresses so computers can find each other.

Cache

Small storage area that holds frequently used data for short time, so the computer can access it quickly.

Hypertext Transfer Protocol (HTTP)

An application protocol. It’s the foundation of communicating data on the world wide web.

Hypertext

Structured data that uses logical links between nodes with text.

HTTPS

The secure version of HTTP (S for secure) that encrypts the data being sent between client and server.

WiFi

Set of radio technology that allow for wireless communication.

VOIP (Voice-Over IP)

Umbrella term for technologies that allow the delivery of audio over the internet.

Gateways

Hardware that connect two networks together.

Cloud Computing

Practice of using servers managed by someone else to do a range of variety tasks.

Database

An electronic system used to store, retrieve and manipulate data. They’re used to keep track of data that’s needed to be tracked.

Redundancy

The unnecessary (and possibly harmful) duplication of data.

Primary key

The column(s) that uniquely identifies one row in a relational database.

Foreign key

Column(s) that feature in the table but are also the primary key to a different table — linking the two together.

Composite Key

Combination of different keys to form a primary key.