What is the difference between using open authentication and pre-shared keys?A • Open authentication requires a password. Pre-shared keys do not require a password.B • Open authentication is used with wireless networks. Pre-shared keys are used with wired networks.C • Pre-shared keys require an encrypted secret word. Open authentication does not require a secret word.D • Pre-shared keys require a MAC address programmed into the access point. Open authentication does not require this programming.