Security practitioners for decades have advised people to limit DNS queries against their DNS servers to only use UDP port 53. The reality is that DNS queries can also use TCP port 53 if UDP port 53 ...

Two simple filters for wireshark to analyze TCP and UDP traffic Your email has been sent Wireshark is a protocol analyser available for download. This week’s post ...

In the last newsletter we started discussing the protocol stack used for transporting voice over IP. Today we’ll move to the control for those conversations. By the way, before we get all those e-mail ...

Have you ever performed surgery on data packets? There are times when that may be the best way to troubleshoot and optimize your network. This edition of the Packet Professor will get you started in ...

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In this first installment of a two-part lesson, we will discuss the difference between IP video that is carried by TCP and IP video that is carried by UDP. They behave very differently on the network.