题目内容：
Current configuration：
version 11．3
no service password-encryption
hostname 2501
ip nat pool aaa 192.1.1.2 192.1.1.10 netmask 255.255.255.0
ip nat inside source list 1 pool aaa
interface Ethernet0
ip address 10．1．1．1 255．255．255．0
ip nat inside
interface Serial0
ip address 192．1．1．1 255．255．255．0
ip nat outside
no ip mroute-cache
bandwidth 2000
no fair-queue
clockrate 2000000
interface Serial1
no ip address
shutdown
no ip classless
ip route 0.0.0.0.0.0.0.0 Serial0
access-list 1 permit 10.1.1.0.0.0.0.255
line con 0
line aux 0
line vty 0 4
password cisco
end
［问题1］NAT按技术类型分为哪3种转换方式?
［问题2］请解释画线部分内容含义?
［问题3］此配置中采用了那种转换方式?
图 4NAT原理图
参考答案：
答案解析：