Final answer:
The customer should check their wireless router and DHCP settings, as the IP address received indicates an issue with obtaining an IP from the DHCP server.
Therefore, the correct answer is: option "DHCP".
Step-by-step explanation:
If a customer's computer is receiving an IP address of 169.254.155.2, this indicates that the computer is configured to obtain an IP address automatically, but it has failed to get one from the DHCP server.
This IP address range is known as Automatic Private IP Addressing (APIPA), and computers assign themselves an IP address within this range when they fail to obtain one from the DHCP server.
The first step should be to check the customer's connection to the wireless router to ensure it is functioning properly. If the router is working, then the issue is most likely related to the DHCP service.
It could be that the DHCP server is not operational or that the customer's computer is not correctly communicating with the DHCP server. Restarting the router and the computer can sometimes resolve this issue.
Additionally, checking the DHCP settings in the router and the network settings on the computer should be done to ensure that there are no configuration issues causing the problem.