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某公司网络管理员使用dhcp服务器对公司内部主机的ip地址进行管理。在某dhcp客户机上执行"ipconfig/all"得到的部分信息如图(a.所示,在该客户机捕获的部分报文及相关分析如图(b.所示。请分析图中的信息,补充图(b.中空白处的内容。
ethernet adapter本地连接:
connection-specific dns suffix.:
description...........:bmadeom 440x 10/100
integrated controller
physical address.........:11-22-33-44-55-66
dhcp enabled...........:yes
ip address............:192.168.0.20
subnet mask...........:255.255.255.0
default gateway.........:192.168.0.1
dhcp server............:192.168.0.100
dns server............:192.168.0.101
lease obtained..........:2013年11月18日
9:30:05
lease expires..........:2013年11月26日
9:30:05

编号源ip目的ip报文摘要报文捕获时间
地址地址
1 【11】255.255.255.255 dhcp:request,type:dhcp discover2013-11-18 09:30:o5
2 【12】【13】dhcp:reply,type:dhcp 【14】2013-11-18 09:30:o5
dhcp:- - - - - -dhcp header- - - - - -
dhcp:boot record type=2(reply)
dhcp:hardware address type=1(10m ethernet)
dhcp:hardware address length=6 bytes
dhcp:hops=0
dhcp:transaction id=3419121f
dhcp:elapsed iroot time=0 seconds
dhcp:flags=0000
dhcp:0=no broadcast
dhcp:client self-assigned address=[0.0.0.0]
dhcp:client address=【15】


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在cisc0路由器上建立-个名为zw246的dhcp地址池,地址池的ip地址是176.115.246.0/24,其中不用于动态分配的地址有176.115.246.2-176.115.246.10,缺省网关为l76.115.246.1,域名为tj.edu.en,域名服务器地址为l76.115.129.26,地址租用时间设定为6小时30分钟。下列dhcp地址池的配置,正确的是(  )。
a.router(config)#ip dhcp pool zw246
router(dhcp-eonfig)#ip dhep excluded-address l76.1 15.246.2 176.1 15.246.10
router(dhcp-eonfig)#network l76.115.246.0 255.255.255.0
router(dhcp-config)#default-router l76.115.246.1
router(dhcp-config)#domain-name tj.edu.en
router(dhcp-config)#dns-server address 176.1 15.129.26
router(dhcp-config)#lease 0 6 30
b.router(config)#ip dhcp excluded-address 176.115.246.2-10
router(config)#ip dhcp pool zw246
router(dhcp-config)#network l76.1 15.246.0 255.255.255.0
router(dhcp-config)#default-router l76.115.246.1
router(dhcp-config)#domain-name tj.edu.ca
router(dhcp-config)#dns-server address l76.115.129.26
router(dhcp-config)#lease 0 6 30
c.router(config)#ip dhcp excluded-address l76.115.246.2 176.115.246.10
router(config)#ip dhcp pool zw246
router(dhcp-config)#network 176.115.246.0 255.255.255.0
router(dhcp-config)#default-muter l76.115.246.1
router(dhcp-config)#domain -name tj.edu.an
router(dhcp-config)#dns-server address 176.115.129.26
router(dhcp-config)#lease 0 6 30
d.router(config)#ip dhcp excluded-address 176.1 15.246.2 176.1 15.246.10
router(config)#ip dhcp pool zw246
router(dhcp-config)#network 176.1 15.246.0 255.255.255.0
router(dhcp-config)#default-router 176.1 15.246.1
router(dhcp-config)#domain-name tj.edu.cn
router(dhcp-config)#dns-server address 176.115.129.26
router(dhcp-config)#lease 30 6 0

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