Key Concepts: Key Terms
Understand that the Internet supports a range of services like the World Wide Web (WWW), file transfer, email, instant messaging (IM).
Understand The Term “Internet”
The Internet is more than just the World Wide Web (WWW). The Internet includes hardware, network infrastructure, and software.
The internet can be described as global network of computers and devices that communicate information and data with each other.
Devices communicate with each other using standardised communication protocols through the internet.
Communication protocols are systems of rules that allow the transmission of information and data between two or more devices.
There are various types of protocol used over the internet such as FTPS, TCP/IP, HTTP, HTTPS, etc. These types will be explained more thoroughly later.
Most websites use HTTPS protocol these days as it’s more secure. See https:// in the browser address bar.
Understand The Term “World Wide Web”.
The World Wide Web refers to the sharing of text, images, audio, and video, as well as other file types, through the internet.
The WWW is accessed through a web browser such as Internet Explorer 11, Google Chrome, or Mozilla Firefox (as well as others)
In the web browser you can type a domain address for direct access to a website or use a search engine such as Google or Bing to find sites.
Understand The Term “File Transfer”
File transfer simply refers to the action of transferring files from one computer or device to another using the internet.
For example, sharing an image on social media is a file transfer, as you are transferring the image from your device to the social media company’s server.
Understand The Term “Email”
Email stands for Electronic Mail.
Emails are used to transfer digital messages from one person to another via the internet using an email address.
Email addresses take the form: [email protected]_name.com
Email messages are stored on an email server and the recipient can access and read them at any time from their device.
You can attach files to an email message, which is a form of file transfer.
Simple Mail Transfer Protocol (SMTP) is a service on the internet that sends messages from an email client to an email server.
The email server typically uses SMTP to relay outgoing messages from the client to the server.
To retrieve messages from the server, the client usually uses IMAP (Internet message access protocol) or POP3 (Post office protocol)
Protocols and client/server relationships will be explained more thoroughly later.
There is a difference between email account and an email address.
The domain name of an email address is the part that comes after the @ symbol.
Google owns the gmail email server and allow users to access and use it. This is an email account.
In the case of an owned domain, the business or individual owns the space on the hosting server to store emails, and usually their website too.
Understand The Term “Instant Messaging”
Instant Messaging (IM) refers to the action of sending electronic messages between author and recipient in real-time.
The messages are stored on a server, so the recipient doesn’t need to be online to receive the message, and they can retrieve it at any time.
Examples of IM apps are Facebook Messenger or Yahoo Messenger.
Understand The Term “Video Conferencing”
Video Conferencing refers to interactions that take place between two or more individuals using video and audio transmissions over the internet.
Video conferencing happens in real-time and cannot be retrieved unless a participant records the session and stores it on their device or in the cloud.
Examples of video conferencing software are Zoom or Skype.