单选题Which feature would prevent guest users from gaining network access by unplugging an IP phone and connecting a laptop computer？（）AIPSec VPNBSSL VPNCport securityDport security with statically configured MAC addressesEprivate VLANs
单选题
Which feature would prevent guest users from gaining network access by unplugging an IP phone and connecting a laptop computer？（）
A
IPSec VPN
B
SSL VPN
C
port security
D
port security with statically configured MAC addresses
E
private VLANs
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