题目内容
（请给出正确答案）
下列关于DHCP配置的叙述中，错误的是__（35）__。
A.在Windows环境下，客户机可用命令ipconfig /renew重新申请IP地址
B.若可供分配的IP地址较多，可适当增加地址租约期限
C.DHCP服务器不需要配置固定的IP地址
D.DHCP服务器可以为不在同一网段的客户机分配IP地址
简答题官方参考答案
（由简答题聘请的专业题库老师提供的解答）
更多“下列关于DHCP配置的叙述中，错误的是__（35）__。A.在Windows环境下，客户机可用命令ipconfig /renew”相关的问题
A、DHCP记录那些IP地址已经使用，那些IP地址可用
B、DHCP服务器存储和维护其他主机配置参数
C、DHCP服务器主动发出动态地址分配请求，并管理IP地址租用期
D、DHCP服务器允许管理员查看、改变和分析IP地址池、租用期、其他配置参数等相关信息
A. 没有永久租约
B. 租约期限到50%时，客户机会更新租约
C. 租约期限到87.5%时，客户机必须更新租约或获得新的IP地址
D. 更新租约的数据传输方式为广播
The defacto standard Application Program Interface （API） for TCP/IP applications is the “sockets” interface. Although this API was developed for __（71）__ in the early 1980s it has also been implemented on a wide variety of non-Unix systems。 TCP/IP __（72）__ written using the sockets API have in the past enjoyed a high degree of portability and we would like the same __（73）__ with IPv6 applications。 But changes are required to the sockets API to support IPv6 and this memo describes these changes。These include a new socket address structure to carry IPv6 __（74）__，new address conversion functions，and some new socket options。These extensions are designed to provide access to the basic IPv6 features required by TCP and UDP applications，including multicasting， while introducing a minimum of change into the system and providing complete __（75）__ for existing IPv4 applications。
A.Windows
B.Linux
C.Unix
D.DOS
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