How dose a DHCP server dynamically assign IP address to host?（） Addresses are allocated after a negotiation between the server and the host to determine the length of the agreement.。 Addresses are assigned for a fixed period of time.At the end of period,a newquest for an address must be made ,and another address is then assigned.。 Addresses are leased to host.A host will usually keep the same address by periodically contacting the DHCP sever to renew the lease.。 Addresses are permanently assigned so that the host uses the same address at all times.。
学前儿童运动系统有何特点？如何做好学前儿童运动系统的卫生保健工作？.
中国的传统宗教是：（） 佛教。 神道教。 道教。 景教。
历史的研究方法
What are three features of voice traffic on a network？（） bursty。 constant。 bandwidth intensive。 small packet sizes。 time-sensitive。 retransmittable。
换流阀组运行期间检测内冷水主要指标电导率要求小于（）。
