to the backbone
Meaning
to the backbone
(idiomatic) Through and through; thoroughly; entirely.
Synonyms: to the bone, to the core; see also Thesaurus:to the full
Examples
All other areas are connected to it, and inter-area routing happens via routers connected to the backbone area and to their own associated areas.
All OSPF areas must connect to the backbone area.
Each of these is distinguished from naturally occurring DNA or RNA by changes to the backbone of the molecule.
Further assume that area 0.0.0.2 has no direct connection to the backbone, but this area does have a connection to area 0.0.0.1.
With hierarchical routing, only core routers connected to the backbone are aware of all routes.