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1. INTERNET, WWW AND E-MAIL TOPIC1: NETWORK AND INTERNET
FUNDAMENTAL
2. OUTLINES NETWORK COMPONENTS WHAT IS NETWORK TYPES OF
NETWORKS BENEFITS RISK OF NETWORK COMPUTING INTERNET HISTORY WHAT
IS INTERNET WHAT IS INTRANET WHAT IS EXTRANET
3. NETWORK DEFINITION A network is a set of devices connected
by communication links. The connections ( Network Link) between
nodes are established using either cable media or wireless media
The best known computer network is the Internet
5. BENEFITS OF NETWORK Resource sharing Printer, processing
power, disk space etc Reduces cost Communication Email, chatting,
video conferencing
6. RISK OF NETWORKS COMPUTING The risk of leakage of
authenticated data on the network by the attack of hackers.
7. TYPES OF NETWOKS
8. LAN Privately owned over a small area(500 m)
9. MAN Bigger version of LAN, Covers an area as big as a
city
10. WAN Covers whole nation or continent
11. INTERNET HISTORY
12. INTERNET The largest network of networks in the world. Uses
TCP/IP protocols and packet switching. Runs on any communications
substrate
13. PACKET SWITCHING A mode of data transmission in which a
message is broken into a number of parts that are sent
independently, over whatever route is optimum for each packet, and
reassembled at the destination.
14. WHAT IS PROTOCOL A protocol is the special set of rules
that end points in a telecommunication connection. use when they
communicate.
15. TCP/IP PROTOCOL Transmission Control Protocol/Internet
Protocol: TCP/IP Is the basic communication language OR protocol of
Internet.
16. TCP: TRANSMISSION CONTROL PROTOCOL Is one of the core
protocol of the internet protocol suite. Specify how data should be
formatted, addressed When you are set up with direct access to the
internet, your computer is provided with a copy of the TCP/IP
program just as every other computer that you may send message to
or get information from also has a copy of TCP/IP.
17. IP: INTERNET PROTOCOL Internet protocol Handles the address
part of each packet so that it gets to the right destination.
18. HOW TCP/IP WOPRKS How data travels over
19. INTRANET A network based on TCP/IP protocols (an internet)
belonging to an organization, Is a collection of private computer
networks within an organization. accessible only by the
organization's members, employees, or others with
authorization.
20. EXTRANET refers to an intranet that is partially accessible
to authorized outsiders. An extranet provides various levels of
accessibility to outsiders. You can access an extranet only if you
have a valid username and password, and your identity determines
which parts of the extranet you can view. Extranets are becoming a
very popular means for business partners to exchange
information.
21. TERMENOLOGY Memex the most important mechanism, conceived
by Vannevar Bush Brush introduced the idea for a microfilm based
machine for storing and retrieving knowledge. It considered as
closed to the modern hypertext system .
22. TERMENOLOGY Mathematical theory of communication: is an
influential 1948 . Article by mathematician Claude E. Shannon.
Claude Shannon demonstrate how to generate English looking text
using Markov chains. www.khanacademy.org/math/applied-
23. TERMENOLOGY Silicon Chip: was first discovered by Jack S
Kilby at Texas in 1958, that are imprinted onto a tiny chip of a
semiconducting material, such as Silicon . Its an electronic
equipment consisting of a small crystal of silicon semiconductor
fabricated to carry out a number of electronic function in an
integrated circuit Example: microprocessor chip