Susan is a network professional at a mid$-$sized company. Her supervisor has assigned her the task of designing a virtual private network $($VPN$)$ implementation. Susan has set up strong authentication and encryption in a test environment, and the VPN appliance is directly facing the Internet. When her work is evaluated, what does her supervisor immediately notice?

Group of answer choices

The VPN device has no open ports to allow external connections by employees.

The VPN device is only protected by Internet Protocol Security $($IPSec$)$ when Susan should have used Secure Sockets Layer $($SSL$)/$Transport Layer Security $($TLS$).$

The VPN device is not protected by a firewall.

The VPN device is configured with a password that can be cracked by a dictionary attack.