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.
