As far as I know, IPv4 and IPv6 are two different protocols and direct connection between an IPv4 and IPv6 cannot be established. If I run a full node with only IPv4, can my node connect to another node with IPv6 only? If no, why do I sometimes see my node's peers are IPv6?
Likewise, is it true that nodes with IPv6 can only connect to other nodes with IPv6? Since there are only about 1000+ IPv6 full nodes in the network now, isn't that they have much fewer choices of peers?