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Chapter13 - CHAPTER 13 Stream Control Transmission...

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1 CHAPTER 13 Stream Control Transmission Protocol (SCTP) Exercises 1. 3. 5. a. Fragments: 21, 24, 26, 27 b. First fragment: 21 c. No last fragment given d. At least 3 middle fragments (22, 23, and 25) are missing 7. The host sends a SHUTDOWN ACK and goes to the SHUTDOWN-ACK-SENT state. general header 12 bytes DATA chunk #1 header 16 bytes DATA chunk #1 22 bytes padding 2 bytes DATA chunk #2 header 16 bytes DATA chunk #2 22 bytes padding 16 bytes ---------- Total 92 bytes general header 12 bytes COOKIE-ECHO chunk 204 bytes DATA chunk 36 bytes ---------- Total 252 bytes
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SECTION 2 9. a. ordered, because the U flag is not set b. B =0, E = 0 means this is a middle fragment c. length is 21, so 3 bytes of padding are needed d. TSN = 5 e. SI = 3 f. SSN = 10 g. message is 48656C6C67 11. See Figure 13.1. Note that the value of cumTSN must be updated to 8. 13. See Figure 13.2. Chunks 18 and 19 are sent but not acknowledged (200 bytes of
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