单选题Which of the following is required if ports from VLANs on two separate switches need to broadcastto each other?（）A Port mirroringB VPNC TrunkingD Port authentication
题目
单选题
Which of the following is required if ports from VLANs on two separate switches need to broadcastto each other?（）
A
Port mirroring
B
VPN
C
Trunking
D
Port authentication