Answer:
Due to unreachable DHCP server
Step-by-step explanation:
As we know that Dynamic Host Configuration Protocol, in short DHCP is the network protocol which is used to central and automatic management of IP address with in the network.
So due to unreachable DHCP server a student could not able to connect with the internet.When the network connection break it means that DHCP server is offline.
So the answer is Due to unreachable DHCP server .