How do I see available protocols in my CVS client?

Use the "cvs info" command from a CVS command line client.

C:\Program Files\cvsnt>cvs info Available protocols: local (internal) ext ext 2.0.51d fork fork 2.0.51d gserver gserver 2.0.51d (Active Directory) pserver pserver 2.0.51d server server 2.0.51d sserver sserver 2.0.51d ssh ssh 2.0.51d sspi sspi 2.0.51d