Network Interface configuration

[hiren panchasara]

Do we store network interfaces configuration information in any file that
survives reboots? (as Linux does it in /etc/network/interfaces)

Only thing I could find was when an interface needs address from DHCP,
rc.conf says ifconfig_em0="DHCP".

I know getifaddrs() can get you list of interfaces but I wanted to know if
there is any such file.

Thanks,
Hiren