linux中DHCP服务的配置题目求解析!!! 下面是题目，高手帮下如何配置

不写完整了，参考一下
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default-lease-time 28800;
max-lease-time 432000;
subnet 172192X128 255255255192 {
option routers 172192x190;
option subnet-mask 255255255192;
option domain-name-servers xxxx; #dns server here
range 172192X129 172192X140;
}
host test1 {
fixed-address 172192X140;
hardware ethernet 0e:34:a3:51:b7:22;
}

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