An administrator attempts to open a web page and sees the following error: ‘Error 404: Page notfound‘. The administrator then uses the ping command and finds that the default gateway cannotbe pinged.At which of the following layers does the problem MOST likely reside?（）A.Layer 1B.Layer 4C.Layer 5D.Layer 7
An administrator attempts to open a web page and sees the following error: ‘Error 404: Page notfound‘. The administrator then uses the ping command and finds that the default gateway cannotbe pinged.At which of the following layers does the problem MOST likely reside?（）
A.Layer 1
B.Layer 4
C.Layer 5
D.Layer 7
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