LTM, DNS and ISP BGP

Hi

If my understanding is right,  BGP interconnection network = bgp neighbor address.

Does that address is private address?

And ISP will advertise your service address network.

If ISP won`t advertise bgp neighbor address, impossible communicate i-query.

I think to communicate i-query, you have to subneting your service address and you that to self-ip.

but that is not good.

when you doing SNAT, which address you translate?

I think SNAT and NAT address is belong to service network, it should be done.