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单选题
NAT是（）。
A
一种特殊的网络
B
内部网
C
一种加密技术
D
网络地址转换技术
参考答案
参考解析
解析：
NAT（Network Address Translation，网络地址转换）是1994年提出的。当在专用网内部的一些主机本来已经分配到了本地IP地址（即仅在本专用网内使用的专用地址），但现在又想和因特网上的主机通信（并不需要加密）时，可使用NAT方法。
更多 “单选题NAT是（）。A 一种特殊的网络B 内部网C 一种加密技术D 网络地址转换技术” 相关考题
考题
NAT的主要技术类型有3种,它们是()
A.静态NAT、动态NAT和网络地址端口转换NAPTB.集中NAT、分布NAT和网络地址端口转换NAPTC.并行NAT、串行NAT和网络地址端口转换NAPTD.主动NAT、被动NAT和网络地址端口转换NAPT
考题
网络地址转换(NAT)的三种类型是()A.静态NAT、动态NAT和混合NATB.静态NAT、网络地址端口转换NAPT和混合NATC.静态NAT、动态NAT和网络地址端口转换NAPTD.动态NAT、网络地址端口转换NAPT和混合NAT
考题
Which statement is true about a NAT rule action of off?()
A. The NAT action of off is only supported for destination NAT rule-sets.B. The NAT action of off is only supported for source NAT rule-sets.C. The NAT action of off is useful for detailed control of NAT.D. The NAT action of off is useful for disabling NAT when a pool is exhausted
考题
Which two statements about static NAT are true? ()(Choose two.)
A. Static NAT can only be used with destination NAT.B. Static NAT rules take precedence over overlapping dynamic NAT rules.C. NAT rules take precedence over overlapping static NAT rules.D. A reverse mapping is automatically created.
考题
华为Eudemon防火墙的支持的双向NAT的描述不正确的是()
A.通过防火墙双向NAT既要对=源地址进行转换，又要对目的地址进行转换B.域内NAT和NAT Server一起使用其实是双向NAT的一个特殊的应用场景C.NAT inbound和NAT Sever一起使用主要用于简化配置NAT Server时的路由配置D.在处理双向NAT时，防火墙是先做NAT转换，然后在进行包过滤的检测
考题
在启用PAT的锐捷路由器上查看PAT转换条目的命令是（）A、show ip nat translationsB、show ip nat statisticsC、show ip nat convertD、show ip nat table
考题
静态NAT的cisco路由器的配置，正确的指令是（）A、ip nat inside source static 192.168.0.3 211.139.250.234B、ip nat inside source static 192.168.0.3 255.255.255.248 211.139.250.234C、ip nat inside source static 192.168.0.3 211.139.250.234 255.255.255.248D、ip nat inside source static 211.139.250.234 192.168.0.3
考题
什么是使用NAT的两个好处？（）A、NAT保护网络的安全性，因为专用网络将不公布。B、NAT加速路由过程，因为任何修改的数据包进行。C、动态NAT便于从网络的外部连接。D、NAT便于端到端通信时IPsec是启用。E、NAT无需重新地址需要外部访问的所有主机。F、NAT通过主机的MAC级复用节省的地址。
考题
Which of the following commands will remove all dynamic entries for a router’s NAT table？（）A、clear nat translationsB、clear ip nat translations*C、clear ip nat statisticsD、clear ip nat transactions*E、clear ip nat translationsF、clear ip nat translations all
考题
Which statement is true regarding NAT?（）A、NAT is not supported on SRX Series devices.B、NAT requires special hardware on SRX Series devices.C、NAT is processed in the control plane.D、NAT is processed in the data plane.
考题
Which two statements about static NAT are true? （）(Choose two.)A、Static NAT can only be used with destination NAT.B、Static NAT rules take precedence over overlapping dynamic NAT rules.C、NAT rules take precedence over overlapping static NAT rules.D、A reverse mapping is automatically created.
考题
在MSR路由器上，使用（）命令查看路由器的NAT老化时间。A、display nat timeB、display nat expireC、display nat aging-timeD、display nat time-out
考题
关于NAT的配置，描述错误的是（）A、NAT通过网络地址转换达到隐蔽内部网络拓扑结构的目的B、NAT不是专门为防火墙而设计的C、NAT是包过滤技术的一种D、NAT既可以实现静态配置，也可以实现动态NAT转换
考题
下列关于NAT缺点描述正确的是（）。A、NAT增加了延迟B、NAT增加对端IP的tracebilityC、NAT通过内部网的私有化来节约合法的注册寻址方案D、NAT技术使得NAT设备维护一个地址转换表，用来把私有的IP地址映射到合法的IP地址上去
考题
Which statement is true about a NAT rule action of off？（）A、The NAT action of off is only supported for destination NAT rule-sets.B、The NAT action of off is only supported for source NAT rule-sets.C、The NAT action of off is useful for detailed control of NATD、The NAT action of off is useful for disabling NAT when a pool is exhausted.
考题
Which two statements about static NAT are true？（）A、Static NAT can only be used with destination NAT.B、Static NAT rules take precedence over overlapping dynamic NAT rules.C、Dynamic NAT rules take precedence over overlapping static NAT rules.D、A reverse mapping is automatically created.
考题
单选题华为Eudemon防火墙的支持的双向NAT的描述不正确的是（）A
通过防火墙双向NAT既要对=源地址进行转换，又要对目的地址进行转换B
域内NAT和NAT Server一起使用其实是双向NAT的一个特殊的应用场景C
NAT inbound和NAT Sever一起使用主要用于简化配置NAT Server时的路由配置D
在处理双向NAT时，防火墙是先做NAT转换，然后在进行包过滤的检测
考题
单选题Which of the following commands will remove all dynamic entries for a router’s NAT table？（）A
clear nat translationsB
clear ip nat translations*C
clear ip nat statisticsD
clear ip nat transactions*E
clear ip nat translationsF
clear ip nat translations all
考题
单选题Which statement is true about a NAT rule action of off？（）A
The NAT action of off is only supported for destination NAT rule-sets.B
The NAT action of off is only supported for source NAT rule-sets.C
The NAT action of off is useful for detailed control of NATD
The NAT action of off is useful for disabling NAT when a pool is exhausted.
考题
多选题Which three methods of source NAT does JUNOS Software support？（）Ainterface-based source NATBsource NAT with address shiftingCsource NAT using static source poolDinterface-based source NAT without PATEsource NAT with address shifting and PAT
考题
单选题查看静态NAT映射条目的命令为（）A
show ip interfaceB
show ip nat routeC
show ip nat statisticsD
show nat ip statistics
考题
单选题Which statement is true about a NAT rule action of off?（）A
The NAT action of off is only supported for destination NAT rule-sets.B
The NAT action of off is only supported for source NAT rule-sets.C
The NAT action of off is useful for detailed control of NAT.D
The NAT action of off is useful for disabling NAT when a pool is exhausted
考题
问答题什么是NAT？NAT的作用是什么？用于什么场合？
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