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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DHCP客户机上执行“ipconfig/all”得到的部分信息如图1所示,该客户机在地址续约时捕获的其中1条报文及相关分析如图8所示。请分析图中的信息,补全图2中空白处的内容。
Ethemet adapter本地连接: Connection-specific DNS Suffix: Physical Address……………………:00-11-22-33-44-55 Dhcp Enabled………………………:Yes IP Address…………………………:192.168.0.1 Subnet Mask………………………:255.255.255.0 Default Gateway…………………:192.168.0.100 DHCP Server……………………:192.168.0.101 DNS Server………………………:192.168.0.102
图1 在DHCP客户机执行ipconfig/all获取的部分信息编号报文摘要
1 DHCP:Reply, Type:DHCP ______IP:……IP Header……IP:Protocol=______IP:Source address=______IP:Destination address=______DHCP:……DHCP Header……DHCP:Boot record type=2(Reply)DHCP:Hardware address type=1(10M Ethernet)DHCP:Hardware address length=6 bytesDHCP:Hops=0DHCP:Transaction id=3 BDB064CDHCP:Elapsed boot time=0 secondsDHCP:Flags=0000DHCP:0=no broadcastDHCP:Client self-assigned address=[192.168.0.1]DHCP:Client address=[192.168.0.1]DHCP:Next Server to use in bootstrap=[0.0.0.0]DHCP:Relay Agent=______DHCP:Client hardware address=001122334455DHCP:Host name=" "DHCP:Boot file name=" "DHCP:Vendor Information tag=63825363DHCP:Message Type=5DHCP:Client identifier=01001122334455DHCP:Address renewel interval=345600(seconds)DHCP:Address rebinding interval=604800(seconds)DHCP:Request IP Address leased time=691200(seconds)DHCP:Server IP Address=[192.168.0.101]DHCP:Subnet mask=255.255.255.0
图2 DHCP客户机进行地址续约时捕获的1条报文及分析

答案: 192.168.0.1
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计算并填写下表:
IP地址 117.145.131.9
子网掩码 255.240.0.0
主机号 ______
网络地址 ______
直接广播地址 ______
子网内第一个可用IP地址 ______
子网内的最后一个可用IP地址 ______

答案: 117.159.255.255[解析] 主机号为后20位,即0.1.131.9。直接广播地址将主机号全部置1,为0111...
填空题

计算并填写下表:
IP地址 117.145.131.9
子网掩码 255.240.0.0
主机号 ______
网络地址 ______
直接广播地址 ______
子网内第一个可用IP地址 ______
子网内的最后一个可用IP地址 ______

答案: 117.144.0.1[解析] 由于主机号全0保留为表示网络,所以子网内的第一个可用IP地址从1开始,即为117.144...
填空题

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DHCP客户机上执行“ipconfig/all”得到的部分信息如图1所示,该客户机在地址续约时捕获的其中1条报文及相关分析如图8所示。请分析图中的信息,补全图2中空白处的内容。
Ethemet adapter本地连接: Connection-specific DNS Suffix: Physical Address……………………:00-11-22-33-44-55 Dhcp Enabled………………………:Yes IP Address…………………………:192.168.0.1 Subnet Mask………………………:255.255.255.0 Default Gateway…………………:192.168.0.100 DHCP Server……………………:192.168.0.101 DNS Server………………………:192.168.0.102
图1 在DHCP客户机执行ipconfig/all获取的部分信息编号报文摘要
1 DHCP:Reply, Type:DHCP ______IP:……IP Header……IP:Protocol=______IP:Source address=______IP:Destination address=______DHCP:……DHCP Header……DHCP:Boot record type=2(Reply)DHCP:Hardware address type=1(10M Ethernet)DHCP:Hardware address length=6 bytesDHCP:Hops=0DHCP:Transaction id=3 BDB064CDHCP:Elapsed boot time=0 secondsDHCP:Flags=0000DHCP:0=no broadcastDHCP:Client self-assigned address=[192.168.0.1]DHCP:Client address=[192.168.0.1]DHCP:Next Server to use in bootstrap=[0.0.0.0]DHCP:Relay Agent=______DHCP:Client hardware address=001122334455DHCP:Host name=" "DHCP:Boot file name=" "DHCP:Vendor Information tag=63825363DHCP:Message Type=5DHCP:Client identifier=01001122334455DHCP:Address renewel interval=345600(seconds)DHCP:Address rebinding interval=604800(seconds)DHCP:Request IP Address leased time=691200(seconds)DHCP:Server IP Address=[192.168.0.101]DHCP:Subnet mask=255.255.255.0
图2 DHCP客户机进行地址续约时捕获的1条报文及分析

答案: ack[解析] 根据DHCP消息类型选项值对应的消息类型表:1代表DHCP discover,2代表DHCP offer...
填空题

如下图所示,某校园网用10Gbit/s的POS技术与Internet相连,POS接口的帧格式是SDH。路由协议的选择方案是校园网内部采用OSPF协议,校园网与Internet的连接使用静态路由协议。校园网内的路由器R1设为DHCP服务器,可分配的IP地址是221.89.23.192/26,其中221.89.23.240~221.89.23.254地址除外,地址租用时间为5小时30分。


网络结构图
请阅读以下R3和R1的部分配置信息,并补充空白处的配置命令或参数,按题目要求完成路由器的配置。
R3的POS接口、OSPF和默认路由的配置信息
Router-R3#configure terminal
Router-R3(config)#interface pos4/0
Router-R3(config-if)#description To Internet
Router-R3(config-if)#bandwidth 10000000
Router-R3(config-if)#ip address 211.68.69.170 255.255.255.252
Router-R3(config-if)#crc ______
Router-R3(config-if)#pos framing sdh
Router-R3(config-if)#no ip directed-broadcast
Router-R3(config-if)#pos flag s1 s0 2
Router-R3(config-if)#no shutdown
Router-R3(config-if)#exit
Router-R3(config)#router ospf 63
Router-R3(config-router)#network ______ area 0
Router-R3(config-router)#redistribute connected metric-type 1 subnets
Router-R3(config-router)#area 0 range ______
Router-R3(config-router)#exit
Router-R3(config)#ip route 0.0.0.0 0.0.0.0 211.68.69.169
Router-R3(config)#exit
Router-R3#
R1的DHCP的部分配置信息
Router-R1#configure terminal
Router-R1(config)# ip dhcp ______ 221.89.23.240 221.89.23.254
Router-R1(config)# ip dhcp pool bupt
Router-R1(dhcp-config)# network 221.89.23.192 255.255.255.192
Router-R 1(dhcp-config)# default-router 221.89.23.1
Router-R1(dhcp-config)# domain-name bupt. edu. cn
Router-R1(dhcp-config)# dns-server address 221.89.23.27 221.89.23.26
Router-R1(dicp-config)#lease ______
Router-R1(dicp-config)#exit
Router-R1(config)#exit
Router-R1#

答案: 32[解析] 可选的crc校验位是16和32。
填空题

如下图所示,某校园网用10Gbit/s的POS技术与Internet相连,POS接口的帧格式是SDH。路由协议的选择方案是校园网内部采用OSPF协议,校园网与Internet的连接使用静态路由协议。校园网内的路由器R1设为DHCP服务器,可分配的IP地址是221.89.23.192/26,其中221.89.23.240~221.89.23.254地址除外,地址租用时间为5小时30分。


网络结构图
请阅读以下R3和R1的部分配置信息,并补充空白处的配置命令或参数,按题目要求完成路由器的配置。
R3的POS接口、OSPF和默认路由的配置信息
Router-R3#configure terminal
Router-R3(config)#interface pos4/0
Router-R3(config-if)#description To Internet
Router-R3(config-if)#bandwidth 10000000
Router-R3(config-if)#ip address 211.68.69.170 255.255.255.252
Router-R3(config-if)#crc ______
Router-R3(config-if)#pos framing sdh
Router-R3(config-if)#no ip directed-broadcast
Router-R3(config-if)#pos flag s1 s0 2
Router-R3(config-if)#no shutdown
Router-R3(config-if)#exit
Router-R3(config)#router ospf 63
Router-R3(config-router)#network ______ area 0
Router-R3(config-router)#redistribute connected metric-type 1 subnets
Router-R3(config-router)#area 0 range ______
Router-R3(config-router)#exit
Router-R3(config)#ip route 0.0.0.0 0.0.0.0 211.68.69.169
Router-R3(config)#exit
Router-R3#
R1的DHCP的部分配置信息
Router-R1#configure terminal
Router-R1(config)# ip dhcp ______ 221.89.23.240 221.89.23.254
Router-R1(config)# ip dhcp pool bupt
Router-R1(dhcp-config)# network 221.89.23.192 255.255.255.192
Router-R 1(dhcp-config)# default-router 221.89.23.1
Router-R1(dhcp-config)# domain-name bupt. edu. cn
Router-R1(dhcp-config)# dns-server address 221.89.23.27 221.89.23.26
Router-R1(dicp-config)#lease ______
Router-R1(dicp-config)#exit
Router-R1(config)#exit
Router-R1#

答案: 221.89.23.0 0.0.0.255[解析] 在路由器的OSPF、配置模式下,使用network ip<子网号><...
填空题

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DHCP客户机上执行“ipconfig/all”得到的部分信息如图1所示,该客户机在地址续约时捕获的其中1条报文及相关分析如图8所示。请分析图中的信息,补全图2中空白处的内容。
Ethemet adapter本地连接: Connection-specific DNS Suffix: Physical Address……………………:00-11-22-33-44-55 Dhcp Enabled………………………:Yes IP Address…………………………:192.168.0.1 Subnet Mask………………………:255.255.255.0 Default Gateway…………………:192.168.0.100 DHCP Server……………………:192.168.0.101 DNS Server………………………:192.168.0.102
图1 在DHCP客户机执行ipconfig/all获取的部分信息编号报文摘要
1 DHCP:Reply, Type:DHCP ______IP:……IP Header……IP:Protocol=______IP:Source address=______IP:Destination address=______DHCP:……DHCP Header……DHCP:Boot record type=2(Reply)DHCP:Hardware address type=1(10M Ethernet)DHCP:Hardware address length=6 bytesDHCP:Hops=0DHCP:Transaction id=3 BDB064CDHCP:Elapsed boot time=0 secondsDHCP:Flags=0000DHCP:0=no broadcastDHCP:Client self-assigned address=[192.168.0.1]DHCP:Client address=[192.168.0.1]DHCP:Next Server to use in bootstrap=[0.0.0.0]DHCP:Relay Agent=______DHCP:Client hardware address=001122334455DHCP:Host name=" "DHCP:Boot file name=" "DHCP:Vendor Information tag=63825363DHCP:Message Type=5DHCP:Client identifier=01001122334455DHCP:Address renewel interval=345600(seconds)DHCP:Address rebinding interval=604800(seconds)DHCP:Request IP Address leased time=691200(seconds)DHCP:Server IP Address=[192.168.0.101]DHCP:Subnet mask=255.255.255.0
图2 DHCP客户机进行地址续约时捕获的1条报文及分析

答案: UDP[解析] 在DHCP服务建立和维护的过程中我们使用的主要协议DHCP属于UDP协议。
填空题

下图是校园网某台主机在命令行模式下执行某个命令时用Sniffer捕获的数据包。


请根据图中信息回答下列问题:该主机上配置的IP地址网络号长度最多是______。

答案: 28[解析] 由报文5知,主机地址为202.113.64.137;由报文10知,执行tracert命令时路径中的第一个路...
填空题

如下图所示,某校园网用10Gbit/s的POS技术与Internet相连,POS接口的帧格式是SDH。路由协议的选择方案是校园网内部采用OSPF协议,校园网与Internet的连接使用静态路由协议。校园网内的路由器R1设为DHCP服务器,可分配的IP地址是221.89.23.192/26,其中221.89.23.240~221.89.23.254地址除外,地址租用时间为5小时30分。


网络结构图
请阅读以下R3和R1的部分配置信息,并补充空白处的配置命令或参数,按题目要求完成路由器的配置。
R3的POS接口、OSPF和默认路由的配置信息
Router-R3#configure terminal
Router-R3(config)#interface pos4/0
Router-R3(config-if)#description To Internet
Router-R3(config-if)#bandwidth 10000000
Router-R3(config-if)#ip address 211.68.69.170 255.255.255.252
Router-R3(config-if)#crc ______
Router-R3(config-if)#pos framing sdh
Router-R3(config-if)#no ip directed-broadcast
Router-R3(config-if)#pos flag s1 s0 2
Router-R3(config-if)#no shutdown
Router-R3(config-if)#exit
Router-R3(config)#router ospf 63
Router-R3(config-router)#network ______ area 0
Router-R3(config-router)#redistribute connected metric-type 1 subnets
Router-R3(config-router)#area 0 range ______
Router-R3(config-router)#exit
Router-R3(config)#ip route 0.0.0.0 0.0.0.0 211.68.69.169
Router-R3(config)#exit
Router-R3#
R1的DHCP的部分配置信息
Router-R1#configure terminal
Router-R1(config)# ip dhcp ______ 221.89.23.240 221.89.23.254
Router-R1(config)# ip dhcp pool bupt
Router-R1(dhcp-config)# network 221.89.23.192 255.255.255.192
Router-R 1(dhcp-config)# default-router 221.89.23.1
Router-R1(dhcp-config)# domain-name bupt. edu. cn
Router-R1(dhcp-config)# dns-server address 221.89.23.27 221.89.23.26
Router-R1(dicp-config)#lease ______
Router-R1(dicp-config)#exit
Router-R1(config)#exit
Router-R1#

答案: 221.89.23.0 255.255.255.0[解析] 在路由器的OSPF配置模式下,使用area<区域号>rang...
填空题

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DHCP客户机上执行“ipconfig/all”得到的部分信息如图1所示,该客户机在地址续约时捕获的其中1条报文及相关分析如图8所示。请分析图中的信息,补全图2中空白处的内容。
Ethemet adapter本地连接: Connection-specific DNS Suffix: Physical Address……………………:00-11-22-33-44-55 Dhcp Enabled………………………:Yes IP Address…………………………:192.168.0.1 Subnet Mask………………………:255.255.255.0 Default Gateway…………………:192.168.0.100 DHCP Server……………………:192.168.0.101 DNS Server………………………:192.168.0.102
图1 在DHCP客户机执行ipconfig/all获取的部分信息编号报文摘要
1 DHCP:Reply, Type:DHCP ______IP:……IP Header……IP:Protocol=______IP:Source address=______IP:Destination address=______DHCP:……DHCP Header……DHCP:Boot record type=2(Reply)DHCP:Hardware address type=1(10M Ethernet)DHCP:Hardware address length=6 bytesDHCP:Hops=0DHCP:Transaction id=3 BDB064CDHCP:Elapsed boot time=0 secondsDHCP:Flags=0000DHCP:0=no broadcastDHCP:Client self-assigned address=[192.168.0.1]DHCP:Client address=[192.168.0.1]DHCP:Next Server to use in bootstrap=[0.0.0.0]DHCP:Relay Agent=______DHCP:Client hardware address=001122334455DHCP:Host name=" "DHCP:Boot file name=" "DHCP:Vendor Information tag=63825363DHCP:Message Type=5DHCP:Client identifier=01001122334455DHCP:Address renewel interval=345600(seconds)DHCP:Address rebinding interval=604800(seconds)DHCP:Request IP Address leased time=691200(seconds)DHCP:Server IP Address=[192.168.0.101]DHCP:Subnet mask=255.255.255.0
图2 DHCP客户机进行地址续约时捕获的1条报文及分析

答案: 192.168.0.101[解析] 一般把DHCP建立过程分为四个阶段:Discover、Offer、Request、A...
填空题

如下图所示,某校园网用10Gbit/s的POS技术与Internet相连,POS接口的帧格式是SDH。路由协议的选择方案是校园网内部采用OSPF协议,校园网与Internet的连接使用静态路由协议。校园网内的路由器R1设为DHCP服务器,可分配的IP地址是221.89.23.192/26,其中221.89.23.240~221.89.23.254地址除外,地址租用时间为5小时30分。


网络结构图
请阅读以下R3和R1的部分配置信息,并补充空白处的配置命令或参数,按题目要求完成路由器的配置。
R3的POS接口、OSPF和默认路由的配置信息
Router-R3#configure terminal
Router-R3(config)#interface pos4/0
Router-R3(config-if)#description To Internet
Router-R3(config-if)#bandwidth 10000000
Router-R3(config-if)#ip address 211.68.69.170 255.255.255.252
Router-R3(config-if)#crc ______
Router-R3(config-if)#pos framing sdh
Router-R3(config-if)#no ip directed-broadcast
Router-R3(config-if)#pos flag s1 s0 2
Router-R3(config-if)#no shutdown
Router-R3(config-if)#exit
Router-R3(config)#router ospf 63
Router-R3(config-router)#network ______ area 0
Router-R3(config-router)#redistribute connected metric-type 1 subnets
Router-R3(config-router)#area 0 range ______
Router-R3(config-router)#exit
Router-R3(config)#ip route 0.0.0.0 0.0.0.0 211.68.69.169
Router-R3(config)#exit
Router-R3#
R1的DHCP的部分配置信息
Router-R1#configure terminal
Router-R1(config)# ip dhcp ______ 221.89.23.240 221.89.23.254
Router-R1(config)# ip dhcp pool bupt
Router-R1(dhcp-config)# network 221.89.23.192 255.255.255.192
Router-R 1(dhcp-config)# default-router 221.89.23.1
Router-R1(dhcp-config)# domain-name bupt. edu. cn
Router-R1(dhcp-config)# dns-server address 221.89.23.27 221.89.23.26
Router-R1(dicp-config)#lease ______
Router-R1(dicp-config)#exit
Router-R1(config)#exit
Router-R1#

答案: excluded-address[解析] 在全部配置模式下,命令ip dhcp excluded-address low...
填空题

下图是校园网某台主机在命令行模式下执行某个命令时用Sniffer捕获的数据包。


请根据图中信息回答下列问题:该主机上配置的域名服务器的IP地址是______。

答案: 202.113.64.3[解析] 由报文5可知,主机向域名服务器进行域名解析,所以域名服务器的IP地址202.113.6...
填空题

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DHCP客户机上执行“ipconfig/all”得到的部分信息如图1所示,该客户机在地址续约时捕获的其中1条报文及相关分析如图8所示。请分析图中的信息,补全图2中空白处的内容。
Ethemet adapter本地连接: Connection-specific DNS Suffix: Physical Address……………………:00-11-22-33-44-55 Dhcp Enabled………………………:Yes IP Address…………………………:192.168.0.1 Subnet Mask………………………:255.255.255.0 Default Gateway…………………:192.168.0.100 DHCP Server……………………:192.168.0.101 DNS Server………………………:192.168.0.102
图1 在DHCP客户机执行ipconfig/all获取的部分信息编号报文摘要
1 DHCP:Reply, Type:DHCP ______IP:……IP Header……IP:Protocol=______IP:Source address=______IP:Destination address=______DHCP:……DHCP Header……DHCP:Boot record type=2(Reply)DHCP:Hardware address type=1(10M Ethernet)DHCP:Hardware address length=6 bytesDHCP:Hops=0DHCP:Transaction id=3 BDB064CDHCP:Elapsed boot time=0 secondsDHCP:Flags=0000DHCP:0=no broadcastDHCP:Client self-assigned address=[192.168.0.1]DHCP:Client address=[192.168.0.1]DHCP:Next Server to use in bootstrap=[0.0.0.0]DHCP:Relay Agent=______DHCP:Client hardware address=001122334455DHCP:Host name=" "DHCP:Boot file name=" "DHCP:Vendor Information tag=63825363DHCP:Message Type=5DHCP:Client identifier=01001122334455DHCP:Address renewel interval=345600(seconds)DHCP:Address rebinding interval=604800(seconds)DHCP:Request IP Address leased time=691200(seconds)DHCP:Server IP Address=[192.168.0.101]DHCP:Subnet mask=255.255.255.0
图2 DHCP客户机进行地址续约时捕获的1条报文及分析

答案: 192.168.0.1
填空题

如下图所示,某校园网用10Gbit/s的POS技术与Internet相连,POS接口的帧格式是SDH。路由协议的选择方案是校园网内部采用OSPF协议,校园网与Internet的连接使用静态路由协议。校园网内的路由器R1设为DHCP服务器,可分配的IP地址是221.89.23.192/26,其中221.89.23.240~221.89.23.254地址除外,地址租用时间为5小时30分。


网络结构图
请阅读以下R3和R1的部分配置信息,并补充空白处的配置命令或参数,按题目要求完成路由器的配置。
R3的POS接口、OSPF和默认路由的配置信息
Router-R3#configure terminal
Router-R3(config)#interface pos4/0
Router-R3(config-if)#description To Internet
Router-R3(config-if)#bandwidth 10000000
Router-R3(config-if)#ip address 211.68.69.170 255.255.255.252
Router-R3(config-if)#crc ______
Router-R3(config-if)#pos framing sdh
Router-R3(config-if)#no ip directed-broadcast
Router-R3(config-if)#pos flag s1 s0 2
Router-R3(config-if)#no shutdown
Router-R3(config-if)#exit
Router-R3(config)#router ospf 63
Router-R3(config-router)#network ______ area 0
Router-R3(config-router)#redistribute connected metric-type 1 subnets
Router-R3(config-router)#area 0 range ______
Router-R3(config-router)#exit
Router-R3(config)#ip route 0.0.0.0 0.0.0.0 211.68.69.169
Router-R3(config)#exit
Router-R3#
R1的DHCP的部分配置信息
Router-R1#configure terminal
Router-R1(config)# ip dhcp ______ 221.89.23.240 221.89.23.254
Router-R1(config)# ip dhcp pool bupt
Router-R1(dhcp-config)# network 221.89.23.192 255.255.255.192
Router-R 1(dhcp-config)# default-router 221.89.23.1
Router-R1(dhcp-config)# domain-name bupt. edu. cn
Router-R1(dhcp-config)# dns-server address 221.89.23.27 221.89.23.26
Router-R1(dicp-config)#lease ______
Router-R1(dicp-config)#exit
Router-R1(config)#exit
Router-R1#

答案: 0 5 30[解析] 在DHCP Pool模式下,命令lease days hours minutes infinite...
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下图是校园网某台主机在命令行模式下执行某个命令时用Sniffer捕获的数据包。


请根据图中信息回答下列问题:该主机上执行的命令是______。

答案: tracert mail.tj.edu.cn[解析] 由报文9~14、17~20中不同的TTL与应答Echo可知,主机执...
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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DHCP客户机上执行“ipconfig/all”得到的部分信息如图1所示,该客户机在地址续约时捕获的其中1条报文及相关分析如图8所示。请分析图中的信息,补全图2中空白处的内容。
Ethemet adapter本地连接: Connection-specific DNS Suffix: Physical Address……………………:00-11-22-33-44-55 Dhcp Enabled………………………:Yes IP Address…………………………:192.168.0.1 Subnet Mask………………………:255.255.255.0 Default Gateway…………………:192.168.0.100 DHCP Server……………………:192.168.0.101 DNS Server………………………:192.168.0.102
图1 在DHCP客户机执行ipconfig/all获取的部分信息编号报文摘要
1 DHCP:Reply, Type:DHCP ______IP:……IP Header……IP:Protocol=______IP:Source address=______IP:Destination address=______DHCP:……DHCP Header……DHCP:Boot record type=2(Reply)DHCP:Hardware address type=1(10M Ethernet)DHCP:Hardware address length=6 bytesDHCP:Hops=0DHCP:Transaction id=3 BDB064CDHCP:Elapsed boot time=0 secondsDHCP:Flags=0000DHCP:0=no broadcastDHCP:Client self-assigned address=[192.168.0.1]DHCP:Client address=[192.168.0.1]DHCP:Next Server to use in bootstrap=[0.0.0.0]DHCP:Relay Agent=______DHCP:Client hardware address=001122334455DHCP:Host name=" "DHCP:Boot file name=" "DHCP:Vendor Information tag=63825363DHCP:Message Type=5DHCP:Client identifier=01001122334455DHCP:Address renewel interval=345600(seconds)DHCP:Address rebinding interval=604800(seconds)DHCP:Request IP Address leased time=691200(seconds)DHCP:Server IP Address=[192.168.0.101]DHCP:Subnet mask=255.255.255.0
图2 DHCP客户机进行地址续约时捕获的1条报文及分析

答案: 0.0.0.0[解析] DHCP: Next Server to use in bootstrap=[0.0.0.0]/...
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