A server administrator pre-configures an SSH server's public key using what SSH client file?

Is there a name for the SSH client file that a system administrator uses to pre-configure the public key of an SSH server?

How can an administrator use the SSH client to pre-configure the public key of an SSH server?

Experiencing slowdowns in performance is possible while using an application proxy due to the challenges of decrypting end-to-end encrypted traffic. It is possible that a proxy server might benefit from a solution that allows for communication via an encrypted protocol at the application layer.

FTP employs a random port for data delivery, while an FTP server constantly listens to the same port for session clients. An FTP server's port what?

What is the name of the file on the SSH client that an administrator has to utilize in order to pre-configure the public key for an SSH server?

How can an administrator pre-configure the public key of an SSH server using the SSH client?

How can an administrator pre-configure the public key of an SSH server using the SSH client?

What is the name of the SSH client file that an administrator uses to pre-configure the public key of an SSH server?

In FTP, if the client needs to retrieve one file from the server site and store one file on the server site, how many control connections and how many data transfer connections are needed?