You are working as a network technician at Domain.com. You are asked to troubleshoot a computer that is unable to reach resources on the network. You PING the loopback address without receiving any response. What is MOST likely the problem?

A.
TCP/IP protocol is not functioning.

B.
LAN is unresponsive.

C.
DHCP server is down.

D.
Ethernet cable needs to be replaced.

Explanation:
A common basic test of the TCP/IP protocol stack on a machine is to enter this command at a shell prompt: ping localhost localhostalways translates to the loopback IP address 127.0.0.1 in IPv4, or ::1 in IPv6.