Administrative Distance or reliability of ip routing protocols

Administrative Distance            Route Type

0                                     -> Connected Interface route

0 or 1                             ->Static Route

90                                  ->Internal EIGRP Route(within the same autonomous system)

110                                ->OSPF Route

120                                ->RIP V1 and V2 Route

170                                ->External  EIGRP Route(from another autonomous system)

255                                ->Unknown Route

Source :Richard Deal CCNA Book