NA新手，又来给大家添麻烦了。。。不好意思。。。
QUESTION 74
A national retail chain needs to design an IP addressing scheme to support a nationwide network. The
company needs a minimum of 300 sub-networks and a maximum of 50 host addresses per subnet.
Working with only one Class B address, which of the following subnet masks will support an appropriate
addressing scheme? (Choose two.)
A. 255.255.255.0
B. 255.255.255.128
C. 255.255.252.0
D. 255.255.255.224
E. 255.255.255.192
F. 255.255.248.0
Answer: BE
Explanation/Reference:
需要至少300个子网，每个子网至少50台主机。使用一个B类地址来划分。
A：最多有256个子网，错误
C：只有64个子网
D：每个子网只有30个可用IP
F：只有32个子网。
发表于 2011-9-22 20:11:49
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