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Re:NSA Kubernetes Hardening Guidance [pdf] by sdenton4 on Tuesday August 03, 2021 @05:49PM (#28054663)
For historical context:

https://www.washingtonpost.com/world/national-security/nsa-i...

(Google has since added encryption to its internal entworks.)

Re:NSA Kubernetes Hardening Guidance [pdf] by adolph on Tuesday August 03, 2021 @09:19PM (#28056220)
Entwork uses a tree topology with stepping roots