How does a DHCP server dynamically assign IP addresses to hosts?（） Addresses are permanently assigned so that the host uses the same address at all times.。 Addresses are assigned for a fixed period of time. At the end of the period, a new request for an address must be made, and another address is then assigned.。 Addresses are leased to hosts. A host will usually keep the same address by periodically contacting the DHCP server to renew the lease.。 Addresses are allocated after a negotiation between the server and the host to determine the length of the agreement.。
国务院（）年下发的文件，标志着我国新一轮“菜篮子”工程的开始。 2006。 2008。 2009。 2010。
必修课程的本质特点就是（），它是社会权威在课程中的体现。选修课程一般分为必选课程与任选课程两类。
《铁路客运运价里程表》中，接算站示意图中，接算站用（）圆圈表示。 黑色。 红色。 绿色。 黄色。
Refer to the exhibit. Router E learned about the PIM RP （designated as 7.7.7.7） from four different sources. Routers A and D advertised the 7.0.0.0 network via EIGRP. Routers B and C advertised the 7.0.0.0 network via OSPF. Considering that all four Ethernet interfaces on router E could potentially lead back to the PIM-RP， when router E receives the first multicast packet down the shared tree， which incoming interface will be used to successfully pass the RPF check？（） E0。 E1。 E2。 E3。 None of these interfaces will be used to successfully pass the RPF check。 All of these interfaces would successfully pass the RPF check。
Which multicast address is reserved for cisco-rp-discovery？（）
