Disadvantages of Internet
The Internet Explosion
Growth of Computer Networking

Unit 10 Communication and Network Concepts
Evolution of Networking : Internet; Communication and Network Concepts PGTRB Computer Instructor Grade I 2021 – SRT Study Circle Group
Internet PGTRB Computer Instructor Grade I 2021 – SRT Study Circle Group
History of Networking and the Internet PGTRB Computer Instructor Grade I 2021 SRT Study Circle Group

0:00 PG TRB COMPUTER INSTRUCTOR GRADE I
00:30 Communication and Network Concepts

PG TRB COMPUTER INSTRUCTOR – 2021

Syllabus
COMMUNICATION AND NETWORK CONCEPTS
Evolution of Networking : Internet
Data communication terminologies : Bandwidth ( Hz, KHz, MHz ) and
Data Transfer rate ( bps, kbps Mbps Gbps Tbps )
Network devices Modern ethernet Card hub Switch Router
Different Topologies – Bus, Tree ; Concepts of Lan, Wan, Man;
Protocol TCP / IP internet wireless / Mobile Communication GSM Electronic Mail Chat Video Conferencing
Network Security Conceps cyber Law Hackers and Crackers
Web pages hyper Test Markup Language ( HTML ) Hyper Text Transfer Protocal ( HTTP website web browser Web Servers

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History of computer Networking
INTERNET Stands for
●● INTERnational NETwork (Technology,
telecom, intelligence)
●● Internet is a network of networks-A
global network.
●● Internet stands for Interesting Notions
Transmitted Electronically Round
Newly Engineered Technology.
Now a days the Internet plays a vital
role. It provides all the information and
services to us. Earlier days if we want
anything, we have to go to market and
purchase in person. Nowadays we order
anything and everything (food, clothes,
stationeries, vegetables…etc.) through
online(Internet). Online service providers
are Flipkart, Amazon, snap deal etc to buy
products via Internet and have the product
at door steps. Online payments help in
sending and receiving money via payment
gateway using this Internet. Refer Figure
10.2 for the Evolution of Internet
e-Governance has made our
work easy by providing all government
information online easily. As Internet
provides its service 24×7 – 365 days, people
around the world can access the government
websites at their own pace.
Merchandising via Internet helps
us get good branded products at offer
rates through free delivery service.
Powerful search engine can take us
to imaginary concept to our hand with
all as a text, audio, video, with briefly and
by without moving to library, or taking
advice from expert. Current affairs can
be updated immediately without any
delay. For example on olden days Internet
Explorer, Yahoo, bing were powerful
search engine. Later, Google stepped
in with user friendly gmail, youtube,
googledrive, google maps, etc. and are
useful applications. Students, researchers
can get their relevant study and research
materials easily via Internet.
Disadvantages of Internet
●● Simply wasting the precious time
on Internet by surfing, searching
unwanted things.
●● Lot of unnecessary wrong informations
are sometimes posted by some people
on their web pages, blog etc.
●● Different types of thefts related to
money and other valuables can take
place through Internet as hackers and
viruses are always active around.
10.2.1 The Internet Explosion
Internet is simply
defined as the World
Wide Web connection
of individual networks
operated by academic
persons, industry
people, government, and private parties.
In few years, the Internet built itself
as a highly powerful platform that changed
our way we do business and the way we
communicate. Internet promotes as the
universal source of information of billions
of people, at work, at home, at school.
As Internet is growing, markable
evolution has come mobile technology and
social web. These two innovations have
changed the life style of people. We may find
many communities in social web. Facebook
was created in 2004 but today has more
than 2,230 million active users. Mobile
Figure 10.3 Generation of Mobile Networks
Artificial intelligence will help
to maintain, manage, and protect the
network problems. Now the networks
are monitored by algorithm that enables
for anomalous build-ups of traffic and
activity which may be the result of nasty
activities such as (DDos) Distributed
Denial-of-Service attacks and attempted
hacks. This Artificial Network powering
algorithms will become most intelligent;
it might find faster and reliable methods
of anticipating threats and cleaning
networks.