Sure it can, the biggest difference between cat5e and 6 is the shielding against interference and cross-talk.
So while cat5e is enough for 1gbit - cat6 is still the better deal when it comes to reliable networkspeeds when/if you have 1 or more other cables close to the tp..
Love this app, tho the newest update makes it show "Instant: 999l/100km" while moving, in neutral or enginebraking doesnt matter. Standing still shows --.-l/100km tho.