The USA is _____ to be a classless society. A: reputedly B: reputation C: repute D: reputed

The Prime Minister wants to reduce social ( ) and make the country a classless society. A: stratification B: satisfaction C: education D: communication

18.His glowing descriptions of a classless society where anyone could__________success through honesty and hard work fired the imaginations of many European readers. A: attain B: retain C: detain D: contain

His glowing descriptions of a classless society where anyone could success through honesty and hard work fired the imaginations of many European readers. A: attain B: etain C: detain D: contain

OSPF协议是一种什么样的路由协议（）？ A: 有类的（classful） B: 无类的（classless） C: 距离矢量路由协议 D: 链路状态路由协议

OSPF协议是一种什么样的路由协议（）？ A: A有类的（classful） B: B无类的（classless） C: C距离矢量路由协议 D: D链路状态路由协议

某公司通过专线上网，申请的合法IP地址段为192.1.1.1~192.1.1.10，使用路由器的NAT功能进行地址转换，具体配置如下： Current configuration: Version 11.3 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 serial 0 Ip address 192.1.1.1 255.255.255.0 Ip nat outside Clockrate 2000000 Interface serial 1 No ip address Shutdown No ip classless Ip route 0.0.0.0 0.0.0.0 serial 0 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：1.）NAT按技术类型分为哪3种转换方式？ 2.）请解释划线部分内容含义？ 3.）此配置中采用了哪种转换方式？