The SSH setup process involves creating host and server keys.
You can determine the size of the host and server keys by using the following guidelines:
It does not matter which key is larger.
If you are using SSH 1.x, the host key is stored in the /etc/sshd/ssh_host_key file.
If you are using SSH 2.0, the RSA host key is stored in the /etc/sshd/ssh_host_rsa_key file, and the DSA host key is stored in the /etc/sshd/ssh_host_dsa_key file.