试题详情
- 单项选择题A network administrator provides an IP address of 128.135.0.142 and a subnet mask of 255.0.0.0. Once a ping is attempted， it fails. Which of the following options is the most probable cause of the failed ping？（）
A、0 is not valid in an IP address
B、128 is a reserved network
C、The subnet mask should be 255.255.0.0. since it is a class B
D、A network problem has occurred since IP and subnet are valid
- C
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