Always reachable. Never the data.
Authorisation, identity checks and the out-of-band instruction that changes the connection state travel outside your data path.

Your data stays on dedicated hardware. Access follows a controlled cycle that introduces the physical path only for an approved session, then removes it.
The cycle
LUV, Vault, Storage and Enterprise follow the same connection cycle. A path is created only for an authorised session, then removed again. The access pattern depends on your product.
Two paths
Offline is the secure state. You set it up once, then every access session is controlled. There is no standing path to attack.
Authorisation, identity checks and the out-of-band instruction that changes the connection state travel outside your data path.
The route from your network to your dedicated storage exists because an approved session needs it, and is removed when the session closes.
Access patterns
The trigger changes by product. The behaviour does not: no standing path, a deliberate connection, approved use, then back offline.
Before first use
Three things are settled before normal access begins.
The four physicals
The cycle works because the foundations are physical, not policy.
A secure physical state to return to. Access becomes a deliberate event, not a permanent network condition.