Resolving Firewall Configuration Issues

A.

The correct answer for this scenario is B: The firewall should be configured with access lists to allow inbound and outbound traffic.

Explanation: Firewalls are security devices used to control traffic between different network segments. By default, firewalls block all traffic that tries to pass through it. To allow traffic to pass through, the firewall needs to be configured with access lists. An access list is a set of rules that defines what traffic is allowed to pass through the firewall and what traffic is blocked.

In this scenario, employees on the network segment covered by the new firewall are unable to access the network. This is because the firewall is blocking all traffic, as no access lists have been configured yet. To resolve the issue, the firewall should be configured with access lists to allow inbound and outbound traffic.

Option A: The firewall should be configured to prevent user traffic from matching the implicit deny rule. This option is incorrect because the implicit deny rule is already in place by default, and it blocks all traffic that is not explicitly allowed by the access list. Configuring the firewall to prevent user traffic from matching the implicit deny rule would not resolve the issue.

Option C: The firewall should be configured with port security to allow traffic. This option is incorrect because port security is a feature used to restrict access to a physical network port based on the MAC address of the device connected to it. It is not used to allow traffic through a firewall.

Option D: The firewall should be configured to include an explicit deny rule. This option is incorrect because the explicit deny rule would block all traffic that matches the rule, which would not resolve the issue. An explicit deny rule is used to block specific traffic that is not allowed by the access list.