lect11 - 1.264 Lecture 11 Web introduction HTTP Internet...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
1.264 Lecture 11 Web introduction, HTTP
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Internet and Web Context We have covered databases, which are the “nodes” in our information network where data is stored We next turn to the Internet and Web, which will be the links that connect the nodes, transferring data from one node to another The Web, based on the Internet, is a communications channel or protocol converter to transfer data from one database to another Communications channel has many layers Protocol conversion includes converting meaning (semantics) as well as technical conversions in how data are represented among the cooperating computers We’ll start with Internet and Web basics, including its historic roots as a way for people to interact We’ll then transition to the Web as a way for systems to interact, which is the current focus
Background image of page 2
Web browsers and servers Internet is “just” a set of loosely interconnected networks A set of local area networks connected via wide area networks No centralized control or management Network segments interconnect via routers: Dedicated computers that manage packets of data TCP/IP is the universal data protocol on the network Data format, content is left to higher-level protocols, like the Web TCP/IP connections Client is typically a data consumer that sends short requests On Web, client is a browser or an application program Server is typically a data provider that sends long responses On Web, server is typically an application server or database server Server listens for requests and transmits desired data Can send static or dynamic data Web connection is active only long enough to exchange data Avoid overhead of many communication channels, but lose state
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Transmission Control Protocol/Internet Protocol TCP/IP Layer 1: Physical Layer 2: Data Link Layer 3: Network Layer 4: Transport Layer 2: Data Link
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 16

lect11 - 1.264 Lecture 11 Web introduction HTTP Internet...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online