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.