Those pesky humans are at it again. Building out their networks. Here, they've drawn up an architecture for networking extra-terrestrial bases. Whether you're on the Earths Moon or orbiting Jupiter, you'll never miss an email. It's a difficult proposition.
Interplanetary distances are so large, the latencies make Internet protocols unusable.
Connection based protocols no longer work. This would be a store and forward type of bundling protocol. Think email without the chattiness of SMTP, and it has all the IP protocols as attachments. Sure, it's a thorough treatment of something that has no current practical use, whatsoever. But in places, it reads like poetry.