Question: what is the difference between navy and navy reserve

title: United States Navy Reserve
text: List of Commanders Tenure begin Tenure end Rank Name Apr 1973 Aug 1974 VADM Damon W. Cooper Aug 1974 Sep 1978 VADM Pierre N. Charbonnet , Jr . Sep 1978 Oct 1982 RADM Frederick F. Palmer Oct 1982 Nov 1983 RADM Robert F. Dunn Nov 1983 May 1987 RADM Cecil J. Kempf Nov 1987 Aug 1989 RADM Francis N. Smith Aug 1989 Sep 1992 RADM James E. Taylor Sep 1992 Sep 1996 RADM Thomas F. Hall Sep 1996 Oct 1998 RADM G. Dennis Vaughan Oct 1998 Oct 2003 VADM John B. Totushek Oct 2003 Jul 2008 VADM John G. Cotton Jul 2008 Aug 2012 VADM Dirk J. Debbink Aug 2012 Sep 2016 VADM Robin R. Braun Sep 2016 Incumbent VADM Luke M. McCollum