Networking

TCP and IP

Excellent write up on basics of TCP

Diagnose TCP connection setup issues

Other resources

MTU Troubleshooting Cisco IOS

Difference between IP fragments and TCP segmentation

Session Initiated Protocol (SIP)

My SIP notes

SIP parameters on nicely formatted and ad free site.

SIP tutorial

SHAKEN

Understanding STIR and SHAKEN

3GPP Long Term Evolution (LTE)

CSCF in VoLTE the P-CSCF part 1 of 4

Wireshark and related stuff

Wireshark docs

Wireshark Manual (man) pages

editcap man page

Capture Filters

Capture Filter examples

Filter by destination IP address dst host x.x.x.x

Add custom columns

Add TCP length column to Wireshark

Editcap

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

Gigabit Ethernet

Throughput

Rickard Nobel article on actual gigabit ethetnet throughput

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