Distance command pertaining to external routes in eigrp, you cannot change the distance of a particular route alone  in EIGRP. Distance Command allows you to change for all external routes at once BUT not for a single route.! For that reason OSPF just Rocks.!

router os 1
distance 171 <ROUTER-ID> <WILDCARD MASK> Accesslist allows you to selectively change the AD for any route in OSPF.!!!

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