在大型网络中,通常采用DHCP完成基本网络配置会更有效率。
【问题1】(1分)
在Linux系统中,DHCP服务默认的配置文件为(1)。
(1)备选答案:
A./etc/dhcpd.conf
B./etc/dhcpd.config
C./etc/dhcp.conf
D./etc/dhcp.config
【问题2】(共4分)
管理员可以在命令行通过(2)命令启动DHCP服务;通过(3)命令停止DHCP服务。
(2)、(3)备选答案:
A.service?dhcpd?start
B.service?dhcpd?up
C.service?dhcpd?stop
D.service?dhcpd?down
【问题3】(10分)
在Linux系统中配置DHCP服务器,该服务器配置文件的部分内容如下:
subnet?192.168.1.0?netmask?255.255.255.0{
option?routers?192.168.1.254;
option?subnet-mask?255.255.255.0;
option?broadcast-address?192.168.1.255;
option?domain-name-servers?192.168.1.3;
range?192.168.1.100?192.168.1.200;
default-lease-time?21600;
max-lease-time?43200;
host?webserver{
hardware?ethernet?52:54:AB:34:5B:09;
fixed-address?192.168.1.100;
}
}
在主机webserver上运行ifconfig命令时显示如下,根据DHCP配置,填写空格中缺少的内容。
该网段的网关IP地址为(7),域名服务器IP地址为(8)。
正确答案及解析
正确答案
解析
【问题1】(1分)
(1)A或/etc/dhcpd.conf
【问题2】(4分)
(2)A或service?dhcpd?start(2分)
(3)C或service?dhcpd?stop(2分)
【问题3】(10分)
(4)52:54:AB:34:5B:09(2分)
(5)192.168.1.100(2分)
(6)255.255.255.0(2分)
(7)192.168.1.254(2分)
(8)192.168.1.3(2分)
本题考查Linux下的DHCP服务配置相关问题。
【问题1】
在Linux系统中,DHCP服务默认的配置文件为/etc/dhcpd.conf。
【问题2】
在Linux系统中,可以在命令行下通过service?dhcpd?start和service?dhcpd?stop进行
DHCP服务的启动和停止。
【问题3】
问题(4)~(6)是webserver的MAC地址、IP地址和网络掩码。在/etc/dhcpd.conf中有如下相关内容:
option?subnet-mask255.255.255.0;
host?webserver{
hardware?ethernet?52:54:AB:34:5B:09;
fixed-address?192.168.1.100;
}
因此可以知道webserver的MAC地址是52:54:AB:34:5B:09,IP地址是192.168.1.100,网路掩码为255.255.255.0。
从dhcpd.conf中可以看到如下内容:
option?routers192.168.1.254;
option?domain-name-servers?192.168.1.3;
因此该网段的网关IP地址为192.168.1.254,DNS为192.168.1.3。
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