A company is implementing a dynamic host configuration protocol (DHCP). Given that the following conditions
exist, which represents the GREATEST concern?

A.
Most employees use laptops.

B.
A packet filtering firewall is used.

C.
The IP address space is smaller than the number of PCs.

D.
Access to a network port is not restricted.

Explanation:
Given physical access to a port, anyone can connect to the internal network. The other choices do not present
the exposure that access to a port does. DHCP provides convenience (an advantage) to the laptop users.
Sharing IP addresses and the existence of a firewall can be security measures.