Best way to check if there is internet?

[Alan Bawden]

Greg Ewing <greg.ewing at canterbury.ac.nz> writes:

   On 8/02/22 8:51 am, Chris Angelico wrote:
   > Some day, we'll have people on Mars. They won't have TCP connections -
   > at least, not unless servers start supporting connection timeouts
   > measured in minutes or hours - but it wouldn't surprise me if some
   > sort of caching proxy system is deployed.

   Or the internet acquires a new protocol that's designed
   for very-long-latency connections.

Very much a hot topic:

https://www.nasa.gov/directorates/heo/scan/engineering/technology/disruption_tolerant_networking_overview
https://en.wikipedia.org/wiki/Delay-tolerant_networking
https://datatracker.ietf.org/doc/html/rfc4838
https://datatracker.ietf.org/doc/html/rfc5050

-- 
Alan Bawden