CCNA640-802 V13题库试题分析37(艾迪飞吴老师讲解)

冷血

<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT face="Times New Roman">1</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">．</SPAN><SPAN lang=EN-US style="FONT-FAMILY: 宋体">How does a DHCP server dynamically assign IP addresses to hosts?<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="FONT-FAMILY: 宋体">A. Addresses are permanently assigned so that the host uses the same address at all times.<o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="FONT-FAMILY: 宋体">B. 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.<o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="FONT-FAMILY: 宋体">C. Addresses are leased to hosts. A host will usually keep the same address by periodically contacting the DHCP server to renew the lease.<o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="FONT-FAMILY: 宋体">D. Addresses are allocated after a negotiation between the server and the host to determine the length of the agreement.<o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><B style="mso-bidi-font-weight: normal"><SPAN lang=EN-US style="FONT-FAMILY: 宋体">Answer: C</SPAN></B><SPAN lang=EN-US style="FONT-FAMILY: 宋体"><o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="FONT-FAMILY: 宋体">解释一下：大部分<SPAN lang=EN-US>DHCP</SPAN>配置包括一个租约时间，这个时间定义了客户端可以使用地址的时间期限，当到达时间期限时，客户端必须重新刷新起租约并获得一个新的<SPAN lang=EN-US>IP</SPAN>地址。

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