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Question: In a packet switched network, a source host transmits packets of 500 bytes each, which travels over one link to a router then from the router over a second link to a destination end system. The propagation speed on both links is 2.1 × 108 m/s. The transmission rate of the first link and the second link is 160Mbps and 120Mbps respectively. Packet processing on the router consumes 4 microseconds per kilobyte. The length of the first link is 1500 km, and the length of the second link is 1400 km. Assume no other packets exist in the network. Ignore the processing and queueing delay on hosts. If the router buffer size is 32 megabytes (MB), which packet is the first one to be lost? Provide the answer as an integer.
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