After a scoreless first-half, Celtic's Diarmuid O’Carroll scored in the 53rd minute and minutes later Ipswich's Billy Clarke added a second.
Substitute Shane Long of Cork City then hit a post with a diving header.
Ian Morris played 45 minutes before being subbed at half-time.
Republic of Ireland: Darren Randolph (Charlton), Gary Dicker (UCD), James Hand (Huddersfield), David Elebert (Preston), Richard Keogh (Stoke), Darren O’Dea (Celtic), Ian Morris (Leeds ), Michael Collins (C) (Huddersfield), Billy Clarke (Ipswich), Diarmuid O’Carroll (Celtic), Jonathan Hayes (Reading).
Subs: Darren Quigley (UCD),Travis Binnion (Sheff Utd),Steven Foley (Aston Villa),Darron Gibson (Man Utd), half time for Randolph, Dicker, Morris and Collins;
John Paul Kelly (Unattached),for Hand (58mins) and Shane Long (Cork City) for Hayes (70) mins.