About transmission media ?

INTERNET SERVICES

1. World Wide Web (WWW)
2. E-mail
3. Instant messaging
4. Voice over Internet Protocol (VoIP)
5. Message board
6. File transfer protocol

WORLD WIDE WEB (WWW)

•The World Wide Web (WWW), or Web, consists of a worldwide collection of electronic documents.

•Each electronic document on the Web is called a Web page which can contain text, graphics,

animation, audio, and video.

•Web pages usually have built-in connections to other documents.

•Some web pages are static (fixed); others are dynamic (changing).

•Visitors to a static web page see all  the same content.

•Visitors to a dynamic web page, can customize some or all of the viewed content such as desired

stock quotes, weather for a region or ticket availability for flights.

•A Web site is a collection of related Web pages and associated items, such as documents and

pictures, stored on a Web server.

•Web server is a computer that delivers requested Web pages to your computer.

•Web 2.0 refer to Web sites that provide a means for users to share personal information, allow users

to modify Web site content and have application software built into the site for visitors to use.

E-MAIL

•Short for electronic mail

•The transmission of messages and files via a computer network

•Consist of simple text or can contain attachments, such as documents, graphics, or

audio/video clips

•Some Web sites — such as Google and Yahoo!—provide free e-mail services.

•One of the original services on the Internet.

•An e-mail address is a unique name that consists of a user name and domain name that

identifies the user.

•Basic form of an email address is: username@hostname.subdomain.domain

                                     Example:   amir@gmail.com

•A user name is a unique combination of characters, such as letters of the alphabet and/or

numbers, that identifies a specific user.

•User name must be different from the other user names in the same domain.

INSTANT MESSAGING(IM)

What is instant messaging (IM)?

A real-time Internet communications service that notifies you when one or more people are online

and 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 IM services support voice and video conversations.

•For IM to work, both parties must be

online at the same time.

•Popular IM software includes:

qAIM (AOL Instant Messenger)

qGoogle Talk

qMySpace IM

qWindows Live Messenger

qYahoo! Messenger

VOICE OVER INTERNET PROTOCOL (VoIP)

What is VoIP?

        Voice over Internet Protocol, a technology for

         making telephone calls over the Internet in

         which speech sounds are converted into

         binary data.

•VoIP is an acronym for Voice Over Internet

Protocol, or in more common terms phone

service over the Internet.

•Also called Internet Telephony.

•To connect a calling party to one or more

local or long distance called parties.

•To place an Internet telephone call, you

need:

  qa high-speed Internet connection (such as DSL or Cable Modem),

  qInternet telephone service,

  qa microphone or telephone

  qinternet telephone software or VoIP router.

•VoIP services are also available on some

mobile services that have wireless Internet

service.

MESSAGE BOARD

What is message boards?

•Type of discussion group.

•Many web sites use message boards

because they are easier to use.

•Also known as discussion group, discussion forum and online forum.

•A general term for any online "bulletin board" where you can leave and expect to see responses to

messages you have left.

•A popular Web-based type of discussion group that does not require a newsreader

FILE TRANSFER PROTOCOL

What is FTP?

•Is an 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 documents, graphics and other objects from your computer

to a server on the internet.

•FTP is one method, users have to transfer webpages 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 file including text, graphics, audio clips, video clips and program files

that reside on an FTP server.

•Some FTP sites restrict file transfers to those who have authorized accounts on the FTP server

•Some examples of FTP programs are Smarter FTP, WS_FTP and Internet Explorer.

•Web developing programs like Dreamweaver can also be used to establish an FTP connection to a

server.