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Both traces indicated the use of TCP using the Selective Acknowledgement algorithm to allow the sender to only re-transmit segments that were dropped. The packets that indicated Duplicate ACKs and Fast Retransmissions where analyzed to see how missing segments information was provided and re-sent using TCP.
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Each of the traces revealed some packet loss, as indicated by Fast Retransmissions and Retransmission. The Notes tab provides information about packets where Retransmission and Duplicate ACKs were detected.
#WIRESHARK SUM IOGRAPH FULL#
The Warnings tab provides both summarized and specific packet numbers where Fast Retransmission, Out-of-Order segments, Window Full Updates events have occurred within the trace. An Analysis of TCP Congestion Control Mechanisms using Wireshark 2 Then Wireshark analysis capabilities are used to gather information about Errors and Warning information contained in the trace. Information gathered during the handshake consists of the sender and receiver advertised Window Sizes (rwnd), Maximum Segment Size (MSS), whether a Window Scale option (WS) is being used, and if the sender and receiver support Selective Acknowledgement (SACK) options. For each trace the three way handshake is analyzed to determine congestion control information being negotiated at the time of connection establishment. Analysis Method A filter was applied to each trace to display only the TCP connection between the source and destination. The focus of both analyses 1C consists of four algorithms : Slow Start, Congestion Avoidance, Fast Transmit, and Fast Recovery. The traces capture file uploads to social media sites - and The files were uploaded from a laptop over a home wireless connection.
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This paper contains an analysis of congestion control mechanisms observed in two network traces captured using Wireshark version 1.4.6. x Receiver-advertised flow control mechanisms x Throughput and round trip time of the connection The traces captures are for file uploads to two remote social media sites and Overview 8 1 he Robustness L ! Transmission Control Protocol (TCP). A detailed packet level analysis of areas within each trace indicating congestion issues will be performed. The paper will analyze the following aspects: x Basic slow start and congestion avoidance mechanisms x Fast recovery: a variation of the TCP slow start mechanism that uses fast retransmit followed by congestion avoidance. Text of An Analysis of TCP Congestion Control Mechanisms using WiresharkĪn Analysis of TCP Congestion Control Mechanisms using Wireshark Jayesh Naithani SEIS 715 - Spring 2011 Abstract This paper contains detailed analysis of two Wireshark traces for investigating the behavior of TCP congestion control mechanisms. The paper analyzes the following aspects: Basic slow start and congestion avoidance mechanisms Fast recovery: a variation of the TCP slow start mechanism that uses fast retransmit followed by congestion avoidance Receiver-‐advertised flow control mechanisms Throughput and round trip time of the connection The trace captures are for file uploads to two social media sites and The paper was a project for a course on Computer Networking Protocols (SEIS 715) at the University of Saint Thomas, Saint Paul, Minnesota. This paper contains a detailed analysis of two Wireshark traces for investigating the behavior of TCP congestion control mechanisms.