slide1 n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
INTERNET PowerPoint Presentation
Download Presentation
INTERNET

Loading in 2 Seconds...

play fullscreen
1 / 23

INTERNET - PowerPoint PPT Presentation


  • 110 Views
  • Uploaded on

INTERNET. INTERNET. Network of Networks Nobody owns it OS - No constraint TCP/IP Protocol VPN (Virtual Private Network) ISP INTRANET. Computer Telephone MODEM Account with ISP Browser Inclination. INTERNET. COORDINATING GROUPS OF INTERNET.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'INTERNET' - tejana


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide2

INTERNET

  • Network of Networks
  • Nobody owns it
  • OS - No constraint
  • TCP/IP Protocol
  • VPN (Virtual Private Network)
  • ISP
  • INTRANET
slide3

Computer

  • Telephone
  • MODEM
  • Account with ISP
  • Browser
  • Inclination

INTERNET

slide4

COORDINATING GROUPS OF INTERNET

Internet Engineering Task Force (IETF) – Operation, Management, Evaluation & development of protocols

Internet Research Task Force (IRTF) – Long term research problems and technical issues

slide5

COORDINATING GROUPS OF INTERNET

Internet Architecture Board (IAB) – Overlooks the functioning of IETF & IRTF and ratifies their proposals

Internet Society – Parent of IAB looks after overall promotion and usage of Internet in education, technical applications & new applications

slide6

INTERNET CONNECTIVITY

DIAL-UP : For single intermittent user; uses normal telephone lines with a modem.

ON DEMAND : Mid range option; Like a dedicated connection but user has to dial through a modem or ISDN (64-128 kbps). ISDN allows both voice & data.

slide7

INTERNET CONNECTIVITY

DEDICATED : For high volume use when No of users wish to simultaneously access Internet. Requires a router at the user end also. Option at different speeds are available.

SATELLITE LINK

RADIO LINK

ISP to INTERNET – T1 (1.544 Mbps) or T3 (45 Mbps)

INTERNET BACKBONE – 1000 Mbps

slide9

BASIC STRUCTURE OF INTERNET

Network Operation Centre

PC

PC

PC

PC

R

R

R

R

R

R

R

Server

Router

Server

ISP

R

LAN I

LAN II

LAN

LAN

LAN

Gateway

Gateway

Building Routers

Internet Backbone

LAN III

ISP

Stand Alone PC

slide10

End User

Gate-way

Gate-way

End User

ISP

Router

ISP

TERMINOLOGY OF INTERNET

BRIDGE – Connecting two NW operating with same OS

ROUTER - Connecting two NW operating with different OS

BROUTER – Plays both the roles of Bridge & Router

ISP – Connects End-users to Internet backbone

GATEWAY – A computer between ISP and Internet Router which connects the regional networks to Internet

INTERNET BACKBONE – High bandwidth fiber optic line with numbers of routers

slide11

DOMAIN NAME SYSTEM

General Format – Host Name . Second Level Domain Name . First Level Domain Name

Host Name – Service Provider Name

Domain Name – Kind of Organisation

Examples of Organisational & Geographic Domains

gov – Government Agencies

mil – Military site

com – Commercial organisation

net – Sites performing admin function

org – Non profit organisation

in – India us – USA

slide12

INTERNET ACCOUNTS

  • For joining Internet community registration with ISP is required.
  • Following type of accounts are available :-
    • Dial-up Shell Account
    • SLIP or PPP Account
    • On Demand connection/account
    • Leased line
slide13

TECHNOLOGY BEHIND WEB

1. URL : It is networked extension of standard file name concept. The file and its directory can exist on any computer on the network. Format of URL

Protocol://DomainName/Directory/Sub-dir/file

http://www.yahoo.com/abc/homepage.html

2. HTTP : Request – Response Actions of HTTP

(a) Browser uses HTTP commands to commn with HTTP server through a response provided by URL.

(b) A TCP/IP connection is established from client to the server.

(c) Browser sends a request to server typically for a file.

(d) Server sends a response message with the requested data.

(e) Connection is terminated after passing the message.

3. HTML : It is based on international electronic document standard called Standard Generalised Markup Language (SGML). Common basic language of interchange for hypertext documents. Doc creation by using control codes in ASCII to designate titles, headings, graphics & hypertext links. Doc size is small.

slide15

WWW

  • Originally developed in Switzerland
  • Internet Navigator tool to retrieve information using links
  • Clients can display pages from any of ~ 5000 Web servers.
  • Has ability to incorporate FTP (File Transfer Protocol
  • Once a document is retrieved link with WWW is broken
  • Web page is truly MULTIMEDIA
slide16

FILE PROTOCOL TRANSFER

SHAREWARE. S/W AVAILABLE ON TRIAL BASIS.

FREEWARE. FREE S/W eg FONTS,CLIP ART & GAME.

UPGRADES. UPDATES & FIXES OF S/W.

DOCUMENTS. RESEARCH PAPERS, ARTICLES etc.

slide17

SEARCH ENGINE ?

IT CARRIESOUT SEARCH IN DIFFERENT WAYS AND COME OUT WITH DIFFERENT RESULTS. EACH SEARCH ENGINE HAS ITS OWN DATA BASE.

IT SENDS THE ELCTRONIC CRAWLERS (CALLED SPIDERS, WORMS OR ROBOTS) THROUGH WEB LOOKING FOR PAGES TO ADD TO THEIR DATABASE OF EXISTING WEB PAGES. IT THEN ADDS THE NEW ENTRY TO THE DATABASE .

slide19

BROWSER

  • USER AGENT IN HML TEXT AND ARE WEB PAGES.
  • WEB BROWSERS
  • INTERNET EXPLORER
  • NETSCAPE NAVIGATOR
  • NEOPLANET
  • LYNX (TEXT ONLY)
  • BROWSERS CAN READ & DISPLAY AS:
  • HTML FILE
  • EMBEDDED GRAPHIC IMAGES
slide20

.

.

.

Internet Addressing

User

@

SubDm

Domain

Group

Country

Cdm@ap.nic.in

mohandaslv@yahoo.com

slide21

DOMAIN NAME SYSTEM

Distributed Hierarchical Naming System

Name is given by traversing the tree to its root

At each node a name is added and period (.) is appended

Each node can have any number child nodes but only one parent node

Each child node MUST have different name

gov

com

in

mil

edu

net

yahoo

E-mail Address

mohandas@ap.nic.net.in

nic

Web Page Address WWW.Yahoo.com

ap