問題文
A retailer must insert a firewall into a link between a distribution switch and a router without changing addressing on either device. Which characteristic of a virtual wire deployment makes this possible?
選択肢
- The firewall assigns both interfaces to the same VLAN object, so the frames are switched between them and the neighbors keep the addresses they already have.
- The firewall copies the frames to its dataplane and forwards the originals untouched, so no addressing change is needed on the neighbors.
- The two bound interfaces carry no Layer 2 or Layer 3 address, so the firewall applies policy and passes the frame on without taking part in switching or routing decisions.
- The firewall learns the addresses of both neighbors and answers on their behalf, so each side believes it is still talking directly to the other device.