Lol - I enjoyed this closing paragraph on Ivan Pepelnjak's post on reaching off-subnet nodes in IP and CLNP, talking about historical "hacks" for IPv4 hosts to auto-discover routers on a LAN:

blog.ipspace.net/2025/03/comp...

Hi! I see that an org called Primus Telecommunications Canada owns those IPs. It's not one single block—it's built out of multiple other subnets. See attached pic. So, in terms of subnetting, there's no way to tell that the 21.0 block comes first. You have to do a whois to find the details.

It's a few years old, but I just discovered a super cool set of gacha (Japanese capsule toys) for a miniature rack of routers and switches.

A forum user called "Agg" has posted extensive photos. Well worth a look: forums.overclockers.com.au/threads/mini...

"Remember that each triple really represents a path from SOURCE to SON of length DISTANCE , where the next-to-last hop on that path is FATHER"

Good to know that I can simply run SPF to find out where my Dad went when he popped out to get milk 15 years ago

Lol so I don't know if this is common in math(s) or not, but the original spec for the shortest-path first (SPF) algorithm in 1978 used the term "son" and "father" to describe one node going to another apps.dtic.mil/sti/pdfs/ADA...