How the Internet Works Flashcards

1
Q

1) UDP

A

Browser sends User Datagram Protocol (UDP) to DNS server (dns server typically belongs to the ISP)

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2
Q

2) DNS action

A

DNS server either knows the domain name, in which case it gets an IP translation, the IP address of the ANS (authoritative name server) or a parent of it that knows how to reach the ANS

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3
Q

3) After locating ANS

A

translated IP address is returned to the client and its browser. If ANS can’t be found, error is returned

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4
Q

4) Browser action

A

Browser sends preferences for TCP communication (window size, etc)

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5
Q

5) Browser request ->

A

Request is routed to “central” ISP server which forwards request to the CO of the destination and then to the server

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6
Q

6) Server action

A

Server accepts or denies request. If accept, sends back its own preferences

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7
Q

7) Browser action

A

If browser agrees to server requirements, connection is established

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8
Q

8) Browser RESTful request

A

Browser sends HTTP GET request which may includes cached “cookies” from previous interactions

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9
Q

9) Server receives request

A

Server receives request, agrees/disagrees, and returns an HTTP response (in the form of an HTML page display)

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10
Q

10) HTML is rendered in the client’s browser

A

and other GET requests are sent by client and returned by the server

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11
Q

AJAX

A

(async JavaScript and XML) can expedite JavaScript asynchronously making in-page requests to a server

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