CPS- How web pages are located, retrieved and displayed

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8 Terms

User opens URL in web browser

Web browser will send URL to DMS

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Web browser will send URL to DNS

DNS will search for IP address

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DNS will search for IP address

Is the IP found?

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Is the IP found?

YES: it sends IP address back to web

NO: web browser sends URL to a new DNS

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YES: It sends IP address back to web browser

NO: web browser sends URL back to a new DNS

Web browser sends request to web browser

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Web browser sends request to web browser

Asks for web page from website through protocol

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Asks for webpage from website through protocol

If protocol is Http:

•Web server sends script back to web browser

•Web browser renders active script to display webpage

If protocol is Https:

•Web browser requests digital certificate from web server

•Web server sends copy of digital certificate to web browser

•Web browser checks if digital certificate is authentic

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If protocol is Https:

•Web browser requests digital certificate from web server

•Web server sends copy of digital certificate to web browser

•Web browser checks if digital certificate is authentic

If it is authentic:

•Web browser allows communication to continue with web server. Any data transmitted between them is encrypted.

•Web server sends script back to display web page

If not authentic:

•Web browser will report that website is not secure.

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