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Questions tagged [packet-analysis]

(Packet-analysis) aka Network Traffic analysis is the process of capturing network traffic and inspecting it closely to determine what is happening on the network Providesthe details of network activities and their communication pattern in a network

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Does increasing the FEC decreases the payload in the maximum packet size?

we can find the maximum packet size by the formula packet err rate = 1 - (1 - bit err rate)^(max packet size) so does this max packet size include the FEC bits? I assume this formula gives the max ...
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TCP retransmissions when we rapidly open multiple connections to the same host

We are experiencing a retransmission issue on some of our computers on our LAN, when connecting to external hosts. I first started trying to trace the issue when the npm typings install command was ...
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Is this a Proper WLAN Fragmentation Diagram I made?

I took information from several images and compiled it into one and am wondering if it's correct. Looking at the smallest components of the packet -> fragments -> frame would this diagrammatically/...
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Regular failure to capture HTTP2

Wireshark will, at times, capture the HTTP/2 traffic (over TLS) without any trouble. However, more often it fails to capture it at all or will only cature . I suspect that it's unable to unwrap the ...
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What do the multiple occurencies mean in a packet trace file?

I have a trace file and I used tshark to find out the number of duplicate ACKs, with the following command: tshark -r file.pcap -T fields -e frame.number -e tcp.analysis.duplicate_ack After some ...
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DUP/ACK Reconciliation

When I see a DUP ACK I understand that it is saying that the packet I received doesn't have the expected sequence number and that I send back what I expected the sequence number to be. My question is ...
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How to plot and benchmark UDP response time?

Our application uses UDP protocol in the transport layer. I'm currently filtering the packet trace with the port and then manually checking the RTT by selecting the packet stream and by using " Set ...
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Is the auto-correlation of a frame transient based on the physical characteristics of a device?

I am currently studying ways to fingerprint Wi-Fi devices based on their physical characteristics and I was struck by a question after reading Section B of this paper http://www.ccs-labs.org/bib/...
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Advertised Window Size

I have one sender and one receiver node, connected through one switch. I am collecting advertised window size from both tcpdump and kernel. I am running tcp dump on the receiver side, to watch for ...