Answer:
1.The DHCP Server is down or not accessible.
Step-by-step explanation:
DHCP which is Dynamic Host Configuration Protocol is a protocol that provides quick, automatic, and central management for the distribution of IP addresses within a network. DHCP is also used to configure the subnet mask, default gateway, and DNS server information on the device.
From the above scenario in the organization, their subnet masks configuration had an error that was what led to their inability to access the network.
So from the above scenario I can point out that the basic problem was that The DHCP Server is down or not accessible.