The most likely error to occur when implementing a firewall is:
A.
incorrectly configuring the access lists.
B.
compromising the passwords due to social engineering.
C.
connecting a modem to the computers in the network.
D.
inadequately protecting the network and server from virus attacks.
Explanation:
An updated and flawless access list is a significant challenge and, therefore, has the greatest chance for errors at the time of the initial installation. Passwords do not apply to firewalls, a modem bypasses a firewall and a virus attack is not an element in implementing a firewall.