题目内容

工商专网是指由（）内部局域网和相互连接的广域网组成的网络。

A. 国家工商总局
B. 省工商局
C. 市工商局
D. 县级工商局

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Which of the following are true regarding a network using a subnet mask of 255.255.248.0?（）

A. It corresponds to a Class A address with 13 bits borrowed.
B. It corresponds to a Class B address with 4 bits borrowed.
C. The network address of the last subnet will have 248 in the 3rd octet.
D. The first 21 bits make the host portion of the address.
E. This subnet mask allows for 16 total subnets to be created.
F. The subnetwork numbers will be in multiples of 8.

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