I actually have two to share and both give away my age ...   First "honest to gosh" network I had to play with was configuring and working with Datapac X.25 connections between a number of shopping centres and head office in the late 80's.  The X.25 connections transferred data between the Prime system at head office (a 9955 Mod II that filled four cabinets) and some weirdo Unix boxes (Fortunes) at the shopping centres.  Hideously slow, tortuous to configure, a nightmare to troubleshoot when things went wrong (and they did, frequently). A few years later in the early 90's at another employer we started implementing frame relay connections between some branches and head office as we slowly moved off of dial up and UUCP file transfers to the relative joy and speed of the frame relay connections.  All systems were Solaris which made things a bit easier to manage as Solaris "understood" networking even if the people pushing the buttons (my staff and I) were still trying to figure it all out. Trust me when I say that we have it relatively easy nowadays, specially when there is a Meraki dashboard and Meraki gear involved! ... View more