As a network boffin it's always very difficult to express to every possible audience quite how busy & complex a job you have, not least in today's environment where you have wired and wireless connectivity from every imaginable device, uPnP, SSDP, ARP, netbios, Active Directory, DHCP, DNS, UDP, TCP... It's a plethora of fields you have to take collectively as knocking on the proverbial door to your network adapter.
Recently we've employed the excellent Solarwinds tools as a method of network node and inter-connectivity debugging, and as much as I enjoy presenting the truly informative flow-charts and information they don't show quite how huge the amount of data and number of packets flying around is.... I therefore set about visualising and displaying just such a situation to an audience...
A Ubuntu VM, with the I3 desktop and a little time later.....
git clone https://github.com/the-tcpdump-group/libpcap.git
sudo make install
git clone https://github.com/the-tcpdump-group/tcpdump.git
sudo make install
And now, I could... "tcpdump"... to just spew everything into a terminal window...
Open another terminal window and I could "tcpdump | grep 'facebook'" and see how much time people were flying off to facebook, the beauty and simplicity of the i3 desktop along with the raw output of tcpdump soon conveyed far more stark a message from a monitor on my desk than any e-mail could or diagram could communicate.
Just the TCP packet headers were enough, without prying into what was being sent over a company network, in company time to facebook... and ebay... and whatever else...
Using egrep I could dig even further into the headers and get very specific, laying out the desktop with i3 just further emphasising the flow and pattern of usage... Anonymize it and I'd have a decent techy screen-saver too!