A company hires some temporary workers. On day one, the temporary employees report they are unable to connect to the network. A network technician uses a packet analysis tool and finds that many clients are continuously sending out requests for an IP address, but many of them are not receiving a response. Which of the following could be the cause of this issue? A. Exhausted DHCP scope.
B. Untrusted SSL certificates.
C. Duplicate MAC addresses.
D. Incorrect firewall settings.

A. Exhausted DHCP scope.

Explanation:

The company has many temporary workers, and permanent workers. There are many people under one network. Since, there are many workers, there can't be untrusted SSL certificates. They all have different devices or computers, so they can't both have duplicate MAC addresses. Lastly, the firewall is supposed to protect against computer viruses and other types of malware, not to harm the user and scope. So, the answer is A.

i want to say d but i could be wrong however it is organized if that could happen..

hope it could