A receiving host computes the checksum...

单项选择题X 纠错

A receiving host computes the checksum on a frame and determines that the frame is damaged.Theframe is then discarded.At which OSI layer did this happen?（）

A.session
B.network
C.physical
D.datalink
E.transport

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Given an IP address 172.16.28.252 with a subnet mask of 255.255.240.0, what is the correct network addres?（）

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