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E-Mail (Electronic Mail)

Email allow us to send and receive message. You can attach picture, video, sounds to your email messages. Email address can be obtained free or with cost from yahoo, indiatimes, hotmail, gmail etc.


Note:- In 1971, email address format using @ was created to separate user id and domain name. Compuserve became the first service provider to offer email facility to PC users in 1979.


Folders on Email page:-
  • INBOX :- Contains the received messages.
  • Sent/OUTBOX :- contains the messages you have sent to others.
  • Compose :- this link opens the page where you write the message for sending to others
  • Spam/Bulk :- Unwanted commercial messages.
  • Drafts :- messages you have created but not sent.
  • Trash :- the received messages those you have deleted.
E-Mail address format:-
fac.manav2010  user name
gmail  host name
.com  types of domain

Uniform Resource Locator (URL):- A URL is a formatted text string used by Web browsers, email clients and other software to identify a network resource on the Internet. Network resources are files that can be plain Web pages, other text documents, graphics, or programs. 

Format of URL:-
Address of website is of the following format:-
http  hyper text transfer protocol
www  world wide web
Google  domain name
.com  types of domain.

Screen of Email

Compose Mail screen

Types of domain:- Various types of domain are used on internet to distinguish between the types of websites like:-
.com  commercial
.edu or ac  educational or academic
.mil  military
.net  belonging to networking or internet service provider company
.org  organizational
.gov  government
.info  informational sites

Email protection against Virus

There are some characteristics of e-mail messages and attachments that may indicate they are unsafe to open. Characteristics include:
  • e-mail from unknown sender;
  • e-mail from a known sender, but subject line does not make sense;
  • message attachment containing filename extension associated with viruses; and
  • message containing links to destinations unrecognizable to the user.
User will successfully avoid virus infection by applying knowledge of these e-mail characteristics and taking appropriate action when reading e-mail (i.e. open message or delete it).

Email Spoofing

E-mail spoofing is e-mail activity in which the sender address and other parts of the e-mail header are altered to appear as though the e-mail originated from a different source. 

Spoofing is the creation of TCP/IP packets using somebody else's IP address. Routers use the "destination IP" address in order to forward packets through the Internet, but ignore the "source IP" address. That address is only used by the destination machine when it responds back to the source. A common misconception is that "IP spoofing" can be used to hide your IP address while surfing the Internet, chatting on-line, sending e-mail, and so forth. 

Important Notes:-
  • E-mail is developed:- Ray Tomlinson introduces network e-mail in 1972. The first messaging system to send messages across a network to other users.
  • TCP is developed:- Vinton Cerf and Robert Kahn design TCP during 1973.
  • First commercial network:- A commercial version of ARPANET known as Telenet is introduced in 1974 and considered by many to be the first Internet Service Provider (ISP).
  • Ethernet is conceived:- Bob Metcalfe develops Ethernet idea in 1973.
  • DNS is introduced:- Paul Mockapetris and Jon Postel introduce DNS in 1984.
  • HTML:- In 1990 Tim Berners-Lee develops HTML, which made a huge contribution to how we navigate and view the Internet today.

Some Popular term on INTERNET

Cookies:- A cookie is a small message sent by the web server to your web client. This message is stored by the browser as a text file. The basic purpose of cookies is to store information needed by a server at the user end only. The cookie is used to send information back to the web server each time the browser requests a page from the server. 

Internet Relay Chat (IRC):- IRC is multi user chat network where people around the world can chat and talk in channels or in private. To use IRC you must install IRC client on your computer. Using this client, you can connect to an IRC server, which is connected to other IRC networks. 

Social Networking:- A social network is a network of individuals which have some sort of interdependence on each other. This interdependence may be in the form of friendship, common causes and so on. A social networking service may be offered through a web site on the Internet. Some of the popular social networking services are - Orkut, Facebook, Twitter, Linkedln, MySpace, Friend Finder etc.

Blog:- Blog is a website where entries are written as information or news on a particular subjects. You can choose any subject for writing a blog like food, health or information about anything.
Apache:- The most common web server (or HTTP server) software on the Internet. Apache is an open-source application originally created from a series of changes ("patches") made to a web server written at the National Center for Supercomputing Applications, the same place the Mosaic web browser was created. 

Archie:- A tool (software) for finding files stored on anonymous FTP sites. You need to know the exact file name or a substring of it. By 1999 Archie had been almost completely replaced by web-based search engines. 

BITNET:- (Because It's Time NETwork (or Because It's There NETwork)) A network of educational sites separate from the Internet, but e-mail is freely exchanged between BITNET and the Internet. Listservs®, a popular form of e-mail discussion groups, originated on BITNET. At its peak (the late 1980's and early 1990's) BITNET machines were usually mainframes, often running IBM's MVS operating system. BITNET is probably the only international network that is shrinking.

Extranet:- An intranet that is accessible to computers that are not physically part of a company’s own private network, but that is not accessible to the general public, for example to allow vendors and business partners to access a company web site. Often an intranet will make use of a Virtual Private Network. (VPN.)

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