![]() ![]() This can result in unnecessary data being sent over the network, exacerbating the congestion problem. Network congestion: If packets are delayed or lost due to congestion, the sender may retransmit them before receiving the corresponding ACKs (acknowledgements).There are several reasons why spurious retransmissions may occur: Expert Insights: Causes and Consequences of Spurious Retransmissions After capturing the traffic and applying the display filter mentioned above, you observe several spurious retransmissions. You notice that the transfer is slower than expected and decide to investigate the issue with Wireshark. Let's consider a real-world example where a file is being transferred between two devices using a TCP connection. This filter highlights packets that have been retransmitted despite having already been acknowledged. To identify them, you can use the Wireshark display filter _retransmission. When analyzing a network capture, you may encounter instances of spurious retransmissions. Real-World Example: Identifying TCP Spurious Retransmissions In this article, we will dive into the causes and consequences of TCP spurious retransmissions, and how to diagnose and troubleshoot them using Wireshark and other packet analysis tools. However, in some cases, packets may be retransmitted even when they have been successfully received, leading to what is known as a "spurious retransmission." This can have a negative impact on network performance and overall user experience. ![]() One of its main features is the ability to retransmit lost or unacknowledged packets. TCP (Transmission Control Protocol) is widely used in modern networking to ensure the reliable and orderly delivery of data. Introduction to TCP Spurious Retransmissions
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