Which of the following quality-of-service guarantees are part of the Internet's best-effort service model?

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In-order datagram payload delivery to the transport layer of those datagrams arriving to the receiving host.

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A guaranteed minimum bandwidth is provided to a source-to-destination flow of packets

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Guaranteed delivery time from sending host to receiving host.

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Guaranteed delivery from sending host to receiving host.

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None of the other services listed here are part of the best-effort service model. Evidently, best-effort service really means no guarantees at all!

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