单选题
An administrator issues the command ping 127.0.0.1 from the command line prompt on a PC.If a reply is received, what does this confirm?（）
发布日期：2020-04-13
The PC has connectivity with a local host.
The PC has connectivity with a Layer 3 device.
The PC has a default gateway correctly configured
The PC has connectivity up to Layer 5 of the OSI model
The PC has the TCP/IP protocol stack correctly installed.
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