Which statement is correct regarding the operation of DHCP?（） A DHCP client uses a ping to detect address conflicts.(ARP)。 A DHCP server uses a gratuitous ARP to detect DHCP clients.。 A DHCP client uses a gratuitous ARP to detect a DHCP server.。 If an address conflict is detected, the address is removed from the pool and an administrator must resolve the conflict.。 If an address conflict is detected, the address removed from the pool for an amount of time configurable by the administrator.。 If an address conflict is detected, the address is removed from the pool and will not be reused until server is rebooted.。
二战期间发展起来的（），科学的考虑了人的舒适性和工作的效率。 设计文化学。 人机工程学。 设计美学。 设计史学。
When configuring system state conditions with the Cisco SecurityAgent， what is the resulting action when configuring more than one system state condition？ （） Any matching state condition will result with the state being triggered。 Once a state condition ismet， the system ceases searching further conditions and will cause the state condition to trigger。 All specified state conditions are used as part of the requirements tobe met to for the state to trigger。 Once the state conditions are met， they become persistent and can only be removed using the Reset feature。
公共选择理论的实质是什么？
都江堰
In BGP routing，what does the rule of synchronization mean？（）
