V$DBLINK

Columns
   ___________________________
 
   OPEN_CURSORS
   COMMIT_POINT_STRENGTH
   PROTOCOL
   HETEROGENEOUS
   LOGGED_ON
   OWNER_ID
   DB_LINK
   IN_TRANSACTION
   UPDATE_SENT

Related Views:

V$ACTIVE_INSTANCES 
V$BGPROCESS 
V$BH 
V$COMPATIBILITY 
V$COMPATSEG 
V$COPY_CORRUPTION 
V$DATABASE 
V$DATAFILE 
V$DATAFILE_COPY 
V$DATAFILE_HEADER 
V$DBFILE 
V$DB_PIPES 
V$INSTANCE 
V$LICENSE 
V$OFFLINE_RANGE 
V$OPTION 
V$SGA 
V$SGASTAT 
V$TABLESPACE 
V$VERSION