Define Internet and Its Applications

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Define Internet and Its Applications
Web Browsers, E-mail clients and Messenger UtilitiesDefine Internet and its
Applications.
The Internet is a global system of interconnected computer networks that use the
standardInternet Protocol Suite (TCP/IP) to serve billions of users worldwide. It is a
network of networksthat consists of millions of private, public, academic, business,
and government networks, of local to global scope, that are linked by a broad array
of electronic and optical networkingtechnologies. The Internet carries a vast range
of information resources and services, such asthe inter-linked hypertext documents
of the World Wide Web (WWW) and the infrastructure tosupport electronic mail.
Applications :
1.
Search engine
:It can be used to search anything and everything. Most popular search engines are
google andyahoo searches.2.
Shopping:
Shopping has become easier with the advent of internet. You can buy or sell
online.3.
Communication :
This is a major role of the internet. It helps people to communicate either with the
use of socialnetworking websites or through e mails. Even chatting is a major use of
the internet.4.
Job search:
Nowadays, many people search for their jobs online as it is quicker and there is a
larger varietyof job vacancies present.5.
Hobbies:
Those who are having certain hobbies can try to improve on it by reading up on
many aspectsof their hobby.6.
Research:
Research papers are present online which helps in the researcher doing aliterature
review.7.

Studying:
Now right from kinder garden children are exposed to internet and computers. They
find manyuseful things to learn on the internet(though with supervision). Upto
doctorate level education,people rely on internet for their education. Online
educational books have even reduced theneed for a library.

These are only some of the uses of the internet. There are so many more that will
can be listedforever. There are also negative aspects of the internet. But the onus is
on the user to make useof the internet for it's benefits and leave all the negative
aspects.
SMTP ( Simple Mail Transfer Protocol)
SMTP is short for Simple Mail Transfer Protocol and it is used to transfer e-mail
messagesbetween computers. It is a text based protocol in which message text is
specified along with therecipients of the message. Simple Mail Transfer Protocol is a
'push' protocol and it cannot beused to 'pull' the messages from the server.A
procedure of queries and responses is used to send the message between the client
and theserver. An end user's e-mail client or the relaying server's Mail Transport
Agents can act as anSMTP client which is used to initiate a TCP connection to the
port 25 of the server. SMTP is usedto send the message from the mail client to the
mail server and an e-mail client using the POPor IMAP is used to retrieve the
message from the server.
Explain WAP in Detail.
The Wireless Application Protocol (WAP) is a protocol been widely used in the mobile
industryand outside of it. WAP is simply a protocol- a standardized way that a
mobile phone talks to aserver installed in the mobile phone network. It provides a
standardised way of linking theInternet to mobile phones. It.enables easy fast
delivery of relevant information and services tomobile users. Handheld digital
wireless devices such as mobile phones, pagers, two-way radios,smartphones and
communicators from low-end to high-end uses WAP. WAP is designed towork with
most wireless networks such as CDPD, CDMA, GSM, TDMA, FLEX, Mobitex and
GRPS.WAP is a communications protocol and application environment. It can be built
on anyoperating system including PalmOS, EPOC, Windows CE, FLEXOS, OS/9,

JavaOS etc. It providesservice interoperability even between different device
families.

Explain POP in Detail
POP is an Internet mail server protocol that provides an incoming message storage
system. Itworks in conjunction with the SMTP (Simple Mail Transfer Protocol), which
provides themessage transport services required to move mail from one system to
another. The currentversion is called POP3.Things that can be done via the POP
include:
y

Retrieve mail from an ISP and delete it on the server.
y

Retrieve mail from an ISP but not delete it on the server.
y

Ask whether new mail has arrived but not retrieve it.
Explain IMAP and its features
IMAP stands for "Internet Message Access protocol) - a email service which helps
accessingyour mailbox from different computers and locations. The IMAP service
allows the user todownload only the message headers and decide if they want to
actually download the rest of the message and the attachments.IMAP was designed
to overcome some problems with POP behavior and provide more featuresfor
delivery and management of e-mail. With IMAP, mail is kept on the mail server and
ismanaged there by a series of commands sent to the server by your client. Copies
of messagesand attachments are transferred to a email client only when one
request them.
Features:
1)Robust folders for storing received and sent messages
2)Freedom for user to download attachments at will
3)Provision for determining message structure without downloading entire message.
4)New mail notification.
5)Support for folder hierarchies

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