History Of The Internet

Front 1

A brief history of the internet

Back 1

• 1969 - originates from US Department of defense
  
• establish computer network between defense department + other govt departments
• function even in case of nuclear war
• packet-switching - if direct not available - routers direct traffic via alternative route
• used initially by computer experts, scientists
• outside Arpanet, other networks established - Joint Academic Network (JANET) 1984

Hint 1

US Department of defense

establish

nuclear war

packet-switching

alternative route

Front 2

Transmission control protocol/Internet protocol (TCP/IP)

Back 2

• com technique developed in 1970s
  
• many networks understand one another + exchange data
• computers need this protocol to access internet
• interacting over internet was complex - until graphical interfaces emerged
• internet has grown dramatically

Hint 2

understand one another

access internet

complex

Front 3

Packet switching

Back 3

• electronic envelopes
  
• packet needs destination address + control info
• messages from computer to another cut up - reassembled at destination
• no guarantee message packet will take same route + arrive at same time
• different route can be selected if one fails

Hint 3

electronic envelopes

address

reassembled

different route

Front 4

Internet browsers

Back 4

• elaboration of hyperlinking
• graphical user interface to hyperlink images, texts, videos, sound
  
• i.e. Netscape, Microsoft Explorer, Safari

Hint 4

elaboration

hyperlink

Front 5

Servers

Back 5

• high speed + capacity computer system
  
• processes com
• allows users to share data + programs
• linked to internet
• web servers - takes requests from client browsers
• searches the web, passes resultant page to browser, support TCP/IP
• mail servers - acts as "post office" for email
• mail created on client site - sent onto internet to intended destination
• mail from outside stored in postboxes
• uploaded to user's computer with requested mail client

Hint 5

high speed + capacity

share data

requests

post office