Hi Suresh,
AFAIK IPLC(International Private Leased Circuit) can use both L2VPN or L3VPN. Essentially, An IPLC (international private leased circuit) is a point-to-point private line used by an organization to communicate between offices that are geographically dispersed throughout the world.
For eg : telco like BT(british telecom) has network all over the world. So, you could have a leased line between 2 countries via BT. You can use L2VPN if you want control over your IP routing . This architecture uses technologies like EoMPLS or AToM to transport data from one end to another.
You can also choose L3VPN which uses IP/MPLS for transport as well but the service provider is also involved in :L3 routing. So whichever technology you use, Service Providers use MPLS as the base transport protocol these days.
I hope this gives you some idea. Experts here on CSC can provide their ideas as well
Regards,
Kishore
