INTRO TO WEB Flashcards
(69 cards)
is a device for transmitting and receiving messages over long distances.
Telegraph
To be able to send message as quickly as possible
internet
the three 1st technology
telephone, telegraph, radio
calls were routed through operators who physically connected caller and receiver by connecting a wire to a switchboard to complete a circuit.
telephone networks
One of the weaknesses of having a physical connection is that you must establish a – and maintain a dedicated circuit for the duration of the call. This type of network connection is sometimes referred to as –
link , circuit switching
internet can be difficult to have multiple conversations –
simultaneously
internet requires more –, since even the silences are –
bandwidth, transmitted
ARPANET was created in
1960s
ARPANET did not use circuit switching but instead used an alternative communications method called –
packet switching
X.25 is created in
1974
USENET is created in
1978
To promote the growth and unification of the disparate networks, a suite of –was invented to unify the
networks.
protocols
is the name given to a formal set of publicly available rules that manage data exchange between two points.
protocol
allow any two computers to talk to one another, so long as they implement the protocol.
Communications protocols
on 1981, New networks built in the United States began to adopt the –
TCP/IP
protocols for the Internet were published and ready for use.
1981
on – TCP/IP was adopted across all of ARPANET.
January 1, 1983
TCP/IP networking was adopted across the globe.
2003
in – and –, email and text-based systems were dominant
Late 1980s and early 1990s
web inventor and founding director of the WWW foundation
Tim Berners-Lee & Robert Cailliau
Essential Elements of Early Web
Uniform Resource Locator (URL)
Hypertext Transfer Protocol (HTTP)
software program/ web server
Hypertext Markup Language (HTML)
Browser
can make HTTP requests to URLs and that can display the HTML it receives.
browser
to uniquely identify a resource on the WWW.
niform Resource Locator (URL)
to describe how requests and responses operate.
Hypertext Transfer Protocol (HTTP)