多项选择题
A. Configure the switch to insert and remove DHCP relay information （option-82 field） in forwarded DHCP request messages.
B. Configure DHCP snooping globally.
C. Configure the switch as a DHCP server.
D. Configure DHCP snooping on an interface.
E. Configure all interfaces as DHCP snooping trusted interfaces.
F. Configure DHCP snooping on a VLAN or range of VLANs.
多项选择题 In the use of 802.1X access control， which three protocols are allowed through the switch port before authentication takes place？ （）
多项选择题 The DAI feature has been implemented in the Company switched LAN. Which three statements are true about the dynamic ARP inspection （DAI） feature？ （）
单项选择题 pany has implemented 802.1X authentication as a security enhancement. Which statement is true about 802.1x port-based authentication？（）