MA_Assignment 12-1.docx - Malik Allen Assignment 12-1 My...

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Malik Allen Assignment 12-1 My Answers: R3: Briefly explain how TCP establishes a connection.
R4: What mechanisms does TCP use to provide acknowledgments and flow control?
reports the highest sequence number of all bytes received. When a TCP packet acknowledges data from an earlier packet, Wireshark provides a link to that earlier packet in its “SEQ/ACK Analysis. ” There is an interesting difference between the packet’s actual contents and Wireshark’s expanded header. Sequence numbers and acknowledgment numbers are shown relative to the start of the connection. Thus, byte 1 in the connection yields sequence number 1 in the expanded Wireshark header. In fact, when TCP opens a connection, it tries to select a random and hard-to-predict starting sequence commands. The receiving hosts accepted the commands, because the source IP address appeared to belong to a trustworthy host. In fact, the source address was forged; the recipient accepted the packet because the attacker accurately guessed the right TCP sequence number. This tricked the recipient’s protocol stack into believing that the trusted

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