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Wireshark retransmission10/22/2023 ![]() Once the frame is lost upper layer protocol may take care of it and decide to retransmit again (in case of TCP), or simply give up (UDP). When a frame is not acknowledged it is retransmitted multiple times before being considered “lost”. This includes UDP and TCP frames, it doesn’t matter upper protocol used, we are on Layer 2 here. It’s well known that any unicast frame on a WiFi network must be acknowledged. Let’s start with some over-simplified description of the two types of retransmission involved before proceeding further. There are many variables involved but some tests may help to clarify. Sometimes documentation about how the limits are enforced are not clear and there are some doubts where the enforcement should be applied for better results. ![]() Per-client bandwidth limit can be applied and enforced on the wireless network itself or on the wired portion of the network, on a router, firewall, 元 switch or any uplink devices between the wireless controller and Internet. The goal is to provide enough bandwidth for each client without allowing someone to take advantage of the free bandwidth for uses outside the scope. This example can be applied to public hotspot networks, fairground, conferences etc. In some cases performances of a single client must be reduced to allow a better average experience for all clients. ![]() WiFi networks are usually deployed to provide best coverage and performances for clients. ![]()
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