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單項選擇題

Which of the following class networks represents a possibility of being further subnetted into 2 subnets of 128 hosts per subnet？（）

A.Class A
B.Class B
C.Class C
D.Class D

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單項選擇題

Which of the following Class A networks is reserved for "private networks" use only？（）

A.network 10.0.0.0
B.network 127.0.0.0
C.network 129.135.0.0
D.network 192.168.0.0

單項選擇題

Which of the following options is a valid host IP address？（）

A.129.0.0.99
B.129.255.0.1
C.224.0.0.1
D.254.0.0.1

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