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Kathleen is emailing a long letter to Joe. The letter size is 16 Kbytes. Assume that TCP is used and the connection crosses 3 links

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Kathleen is emailing a long letter to Joe. The letter size is 16 Kbytes. Assume that TCP is used and the connection crosses 3 links as shown in the gure below. Assume link layer header is 40 bytes for all links, 1P header is 20 bytes, and TCP header is 20 bytes. WI? 256 bytes Link 2 MTU = 1500 bytes Kathleen Link1 MTU = 512 bytes (a) How many packetsfdatagrams are generated in Kathleen's computer on the IP level? Show the derivation of your result. (b) How many fragments Joe receives on the IP level? Show the derivation

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