How to verify SSH connections was secured?

The `ssh -v 1` command explicitly forces the use of SSH Protocol Version 1, which is considered insecure due to known vulnerabilities.

The `ssh -v 2` command explicitly forces the SSH client to use SSH Protocol Version 2, which is the current, secure version of the protocol. SSHv1 has known security vulnerabilities and should be avoided for secure communication, making the explicit selection of SSHv2 crucial for verification. The `-l admin IP` part specifies the username and target host for the connection.

The `ssh -l admin IP` command attempts to connect using the default SSH protocol version, which might be version 1 if not configured otherwise, and does not explicitly ensure a secure version is used.