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I connected to a web server using a browser and downloaded a file, and the server sent it to me. Which layer in the operating system is responsible for routing the file data to the web server?

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Which transport layer protocol does the Domain Name service(DNS) usually use, and why?

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I’m writing a Python client that uses socket to connect to a server over TCP and send it some data. When is the first time my computer sends a message to the server?

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Which of the following features is NOT required for reliable data transfer?

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In a Selective Repeat connection, the receiver did not get any data for a long time. How will it react?

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In a Go-Back-n connection, the receiver received packets #1, #2, and #3, and now it receives packet #5. How will it react?

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What is the informal definition of congestion in a network?

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How does congestion differ from flow control in a network?

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How does TCP address the issue of congestion in computer networks?

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How does TCP regulate congestion window growth during congestion avoidance?

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