which three protocols are allowed through the switch port before authentication takes place? seenagape 10 years ago In the use of 802.1X access control, which three protocols are allowed through the switch portbefore authentication takes place? (Choose three.) A. EAP MD5 B. TACACS+ C. EAP-over-LAN D. CDP E. protocols not filtered by an ACL F. STP ← Previous question Next question →