Internet Services

INTERNET

SERVICES

World Wide Web(www)

• While the Internet was developed in the late 1960's, the World Wide Web emerged in the early 1990's as an easier way to access online information using a browser. Since then, it has grown phenomenalty to become one of the more widely used services on the Internet.
• The World Wide Web(www), or web, consists of a worldwide collection of electronic documents. Each electronic document on the web is called a webpage, which can contain text, graphic, animation, audio, and video.

e-mail

• Email(short for electronic mail) is the transmission of messages and files via a computer network. Email was one of the original services on the internet, enabling scientists and researchers working on government-sponsored projects to communicate with colleagues at other locations.
• You can use an email program to create, send, receive, forward, store, print, and delete email messages. Email programs are available as desktop apps, web apps, and mobile apps. An email message can be simple text or can include an attachment such as a document, a graphic, an audio clip, or a video clip.
• Just as you address a letter when using the portal system, you address an email message with the email address of your intended recipient. Likewise, when someone sends you a message, he or she must have your email address.
• An email address is a combination of a user name and a domain name that identifies a user so that he or she can receive Internet email. A user name is a unique combination of characters, such as letters of the alphabet and/or numbers, that identifies a specific user. Your user name must be different from the other user names in the same domain.

Instant Messaging

• Internet messaging services, which often occur in real-time, are communications services that notify you when one or more of your established contacts are online and then allows you to exchange messages or files or join a private chat room with them.
• Real time means that you and the people with whom you are conversing are online at the same time. Some Internet messaging services support voice and video conversations, allow you to send photos or other documents to a recipient, listen to streaming music, and play games with another online contact.
• For real-time Internet messaging to work, both parties must be online at the same time. Also, the receiver of a message must be willing to accept messages. To use an Internet messaging service, you may have to install messenger software or an app on the computer or mobile device, such as a smartphone, you plan to use.

Voice over Internet Protocol(VoIP)

• Definition: Conversation that takes place over the Internet using a telephone connected to a computer, mobile device, or other device.
• Also called Internet telephony.
• Enables users to speak to other users via Internet connection.
• To connect a calling party to one or more local or long distance called parties.
• Example: Skype, WeChat, Kakao Talk

To place an Internet telephone call, you need:

• a high-speed Internet connection(such as DSL or Cable Modem)
• Internet telephone service 
• a microphone or telephone
• internet telephone software or VoIP router

VoIP services are also available on some mobile services that have wireless Internet service.

Message Board

• Definition: An online area in which users have written discussions about a particular subject
• Also called as discussion forum.
• Type of discussion group.
• Not real-time.

To participate in a discussion, a user posts a message, called an article, to the newsgroup, and other users in the newsgroup read and reply to the message.

A thread, or threaded discussion, consists of the original article and all subsequent related replies.

Some discussion forums require that you enter a user name and password to participate in the discussion.

For example, a discussion forum for students taking a college course may require a user name and password to access the forum. This ensures that only students in the course participate in the discussion. Posts in a discussion forum usually are stored for a certain amount of time, such as a semester, in this example.

File Transfer Protocol(FTP)

• Definition: Internet standard that permits file uploading and downloading with other computers on the Internet.
• A standard for the exchange of program and data files across a network.
• Uploading is the process of transferring files from your computer or mobile device to a server on the internet.
• Downloading is the process of transferring files from a server on the internet to your computer or mobile device.
• Example: FileZilla, AbleFTP, SmartFTP

FTP is one method, users have to transfer web pages files from their local machine to the server.

An FTP server is a computer that allows users to upload and/or download file using FTP.

An FTP site is a collection of that reside on an FTP server.

Some FTP sites restrict file transfers to those who have authorized accounts( user names and passwords) on the FTP server.