CCNA认证考试最新真题

文章作者 100test 发表时间 2011:03:17 20:11:04
来源 100Test.Com百考试题网

（1）TCP/IP Addressing and Protocol

1: Your junior network administrator wants to know what the default subnet mask is for a Class C IP address. What do you tell him?

A. 255.0.0.0

B. 255.255.0.0

C. 255.245.255.0

D. 255.255.255.0

E. 255.255.255.255