SSH2 is the preferred and better supported version, but many systems still only support SSH1. To maintain compability with both systems, both versions are installed on the Hunter Creech workstations. A nice feature of SSH2 is that it will fall back to SSH1 compatibility mode and attempt a SSH1 connection should a SSH2 request fail.
When you enter ``ssh'' on the command line while logged into a Hunter Creech workstation, the default is SSH2. You can explicitly use either version of any of the SSH tools by appending a 1 or a 2 to the name, as you shall see in the steps below.
To determine the default version on any other system, execute:
ssh -V
(Note that the above command uses a capital ``V''.)