which three protocols are allowed through the switch port before authentication takes place? seenagape 9 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 →