While it's nice to be able to manipulate SSH using command-line arguments, it's also nice to not have to bother.
If you've got a system you work on day in and day out, it can be beneficial to configure your setup with your typical arguments on a permanent basis. This is where the client-side SSH configuration file comes in.
On our example box, the default ssh_config file is located in the /etc/ssh/ directory. Open this file to have a look if you like, but don't make any changes yet.