... Port Security MAC A MAC D MAC E MAC F MAC A Attacker Attacker VLAN Hopping VLAN 10 802.1Q Trunk Server VLAN 20 Attacker sees traffic to servers Server Mitigating VLAN Hopping switch( config-if)# switchport... Resources 802.1x and Port Security A = Attacker Hub I don’t know A, I know B Port unauthorized Port Security and Identity B = Legitimate User Cisco Secure ACS/RADIUS Implementing Switch Port Analyzer... Implementing Switch Port Analyzer SPAN BSCI v3.0—2-16 Switch Port Analyzer • The Switch Port Analyzer (SPAN) feature is used to mirror traffic from one source switch port or VLAN to a destination port •