Pompey Academy hit four goals for the second game in succession to secure victory over Exeter at Copnor Road.
They forged ahead after just seven minutes when Freddie Read found the net with a free-kick from 20 yards.
And the lead was doubled midway through the first half, courtesy of a fine long-range Leon Maloney (pictured) strike that flew into the top corner.
There was still time for one more goal before the break and it was Maloney on target again, although this time his shot bobbled fortuitously over the keeper.
Exeter pulled one back following the interval and Leon Pitman made some key stops to stop them reducing the deficit further.
Maloney was denied his treble by a fine save, but substitute Stan Bridgman did wrap things up with a calm finish.
Academy manager Mark Kelly said: “The lads were excellent and full of vibrancy, which is exactly what we’d asked of them ahead of the game.
“We wanted a bright start and were three goals up at the break, so obviously we were happy with that.
"The lads were excellent and full of vibrancy, which is exactly what we’d asked of them ahead of the game."
“There was some real quality on show. We got in behind our opponents with pace and determination, while also keeping hold of the ball when we needed to.
“We were able to open Exeter up and made the most of our dominance with some impressive crossing and finishing.
“They came out stronger in the second half and pulled one back early on, which put us on the back foot for about 15 minutes.
“But we were able to calm down and regain control, defending well and then getting the fourth goal to seal it.
“Overall it was an extremely pleasing performance from us and the lads played well across the board.”
Pompey: Pitman; Mnoga, Dandy, Robb; Kavanagh (Bruce 76), Whiting, Read, Johnston, Flint (Rew 81); Maloney, Stanley (Bridgman 66)