A User Is Unable to Access Any LAN Resources, Such

Multiple Choice

A user is unable to access any LAN resources, such as network shares or printers, but is able to surf the Internet. Which of the following troubleshooting steps should a technician perform FIRST?

A) Inquire about infrastructure changes.
B) Perform a complete system backup.
C) Document findings and actions.
D) Establish a theory of probable cause.