1. [单选题]The 201.145.32.0 network is subnetted using a /26 mask. How many networks and IP hosts per network exists using this subnet mask?
A. 4 networks and 64 hosts
B. 64 networks and 4 hosts
C. 4 networks and 62 hosts
D. 62 networks and 2 hosts
E. 6 network and 30 hosts
2. [单选题]“ipaccess-group”命令在接口上缺省的应用方向是什么"（）。
A. in
B. 具体取决于接口应用哪个访问控制列表
C. out
D. 无缺省值
3. [单选题]哪一个命令可以设置路由器特权用户的“明文密码”（）
A. enable password
B. password
C. enable secret
D. secret
