Unlike many other services, OpenSSH cannot be configured to hide its version information
without recompiling from source code. What is the primary reason for this disclosure of
version information?

A.
It is used by network auditing tools to report on when versions of ssh require security
updates.

B.
There are many inconsistent SSH client and server versions. This information is used to
enable protocol compatibility adjustments.

C.
The information is used for surveys of SSH servers on the internet by the OpenSSH
project.

D.
Being a security centric application, the OpenSSH developers do not rely on security

through obscurity.