You have just installed a new router in your home office. The installation guide advises you to log in to the router's admin panel using a default username and password combination that is common across all devices of this model. What should you do immediately after installation to ensure the security of your network?
Create a new, strong password that is unique to your network and replace the default one in the admin panel.
Keep the default password but install good antivirus software on your computers to prevent unauthorized access.
Immediately update the router firmware to the latest version available to ensure security.
Write down the default password and keep it in a safe place in case you forget it.