Which of the following actions are used in network-assisted congestion control (say versus end-end congestion control) to signal congestion? Check all that apply.

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Answer

The transport-layer receiver informs sender of the size of its (transport-payer receiver) receive window.

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A router drops a packet at a congested router.

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A router sends an ICMP message to a host telling it to slow down its sending rate.

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A datagram experiences delay at a congested network router, which is then measured by the sender and used to decrease the sending rate.

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A router marks a field in the datagram header at a congested router.

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A sender decreases its sending rate in response to packet loss detected via its transport-layer ACKing.

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The sender decreases its sending rate in response to a measured increase in the RTT.

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Which of the following actions are used in network-assisted congestion control (...

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