Finally the fleet gets the chance to make its escape. Just an Imperial sensor net stands in the way, so all fighters are launching to simultaneously strike multiple targets to obscure the primary vector.
This isn't an especially difficult mission. You're just flying escort for the primary attack birds, so kill the fighters and static defenses. Keep an eye out for the escape shuttle launching from the control station, if you don't kill it quickly, it will jump and you'll lose the bonus points.
After that, it's time for a cinematic, and a chance to see the results of your interdiction actions on the ISD Corrupter.