From the course: Wireshark Essential Training

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Network latency issues

Network latency issues - Wireshark Tutorial

From the course: Wireshark Essential Training

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Network latency issues

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- [Instructor] Wireshark has many built-in tools to help the network administrator identify and troubleshoot network latency issues. Tools that include the Expert system, Coloring rules, the Intelligent Scrollbar and the time values that are built into Wireshark to identify gaps in transmission. Within the Expert Information there are several things that are cause for concern. That includes Zero window. That means that the client is unable to receive any more data because the buffer is full. Now on the client side that might not be a big problem, but if it's a server this could cause major bottlenecks. Keep-alives that are saying keep this session alive and Duplicate Acknowledgements where the client is re-requesting the data over and over again until it receives it. Retransmissions or fast retransmissions, or what we call spurious retransmissions. A spurious retransmission is data that is sent again, even though it's already been acknowledged and that is because the server somehow…

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