Difference between revisions of "Networking"
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[https://forum.networklessons.com/t/difference-between-ip-fragmentation-and-tcp-segmentation/1815 Difference between IP fragments and TCP segmentation] | [https://forum.networklessons.com/t/difference-between-ip-fragmentation-and-tcp-segmentation/1815 Difference between IP fragments and TCP segmentation] | ||
[https://en.wikipedia.org/wiki/Bandwidth-delay_product bandwidth-delay product], aka "Long Fat Network" (LFN), is the product of a data link's capacity (in bits per second) and its round-trip delay time (in seconds) | |||
[https://en.wikipedia.org/wiki/TCP_window_scale_option TCP window scale] option is an option to increase the receive window size allowed in Transmission Control Protocol above its former maximum value of 65,535 bytes. This TCP option, along with several others, is defined in IETF RFC 1323 which deals with long fat networks (LFNs). | |||
== Session Initiated Protocol (SIP) == | == Session Initiated Protocol (SIP) == | ||
Revision as of 15:04, 7 January 2019
TCP and IP
Excellent write up on basics of TCP
Diagnose TCP connection setup issues
Other resources
Difference between IP fragments and TCP segmentation
bandwidth-delay product, aka "Long Fat Network" (LFN), is the product of a data link's capacity (in bits per second) and its round-trip delay time (in seconds)
TCP window scale option is an option to increase the receive window size allowed in Transmission Control Protocol above its former maximum value of 65,535 bytes. This TCP option, along with several others, is defined in IETF RFC 1323 which deals with long fat networks (LFNs).
Session Initiated Protocol (SIP)
SIP parameters on nicely formatted and ad free site.
SHAKEN
3GPP Long Term Evolution (LTE)
CSCF in VoLTE the P-CSCF part 1 of 4
Capture filter examples
Filter by destination IP address dst host x.x.x.x
Filter by a set of TCP ports tcp port 22 or tcp port 443 or tcp port 8080
Display filter examples
Filter out TCP Keep-Alive and TCP Keep-Alive ACK with this filter:
!(tcp.flags.ack && tcp.len <=1)
Filter by port 442 and remove TCP Keep-Alive and TCP Keep-Alive ACK with this filter:
tcp.port == 443 && !(tcp.flags.ack && tcp.len <= 1)
Add custom columns
Add TCP length column to Wireshark
Editcap
Reference editcap man page
Saves only packets whose timestamp is on or after start time. The time is given in the following format YYYY-MM-DD HH:MM:SS.
Example of timestamps after 2018-12-26 00:00:00 using PowerShell:
& 'C:\Program Files\Wireshark\editcap.exe' -A "2018-12-26 00:00:00" infile outfile
Example to limit capture file from frame number 890000 to 910000 (inclusive) using PowerShell:
& 'C:\Program Files\Wireshark\editcap.exe' -r infile.pcap smallerOutFile.pcap 890000-910000
Note: smallerOutFile.pcap in above example will have different frame numbers (counting starts over when you open file).
Gigabit Ethernet
Throughput
Rickard Nobel article on actual gigabit ethetnet throughput