Virtual Local Area Networks (VLANs)

Correct Answer: Configure two separate VLANs, one for Finance and one for Marketing.

When aiming to segregate network traffic between different departments, creating separate VLANs for each department would be the most effective solution. Thus, 'Configure two separate VLANs, one for Finance and one for Marketing' is the correct answer. VLANs divide a network at the data link layer into distinct broadcast domains, which are mutually isolated so that packets can only pass between them via one or more routers. Consequently, the departments are essentially placed on separate switches. The other answers are mistaken. 'Configure one VLAN and add both departments' would not segregate the network traffic. 'Disable VLAN support on the switch' would offer no solution for segregating traffic between the departments. 'Configure one VLAN for Finance and no VLAN for Marketing' would not ensure network traffic is isolated between the departments.

Correct Answer: Configure and enable port security.

In order to only allow traffic from devices within the same VLAN on switchports, a network administrator should 'Configure and enable port security'. Port security allows the administrator to restrict the input to an interface by limiting and identifying MAC addresses of the workstations that are allowed to access the port. This configuration ensures that only registered devices within the VLAN can transmit data through their assigned ports. The other options present are not viable. 'Disable all VLANs on the switch' will make the switch non-functional and go against the requirement. 'Configure port mirroring' is used for diagnosing and troubleshooting network issues, however, it doesn’t restrict traffic to the same VLAN. Finally, 'Enable InterVLAN routing' allows communications between different VLANs, which is the opposite of what the question asks.

Correct Answer: Create a separate VLAN for each wireless AP.

Creating a separate VLAN for each wireless AP is the correct solution to alleviate the issue of broadcast storms caused by excessive broadcasts from wireless access points (APs). A VLAN, or Virtual Local Area Network, is a subnetwork which allows for the segmentation of a computer network at the data link layer. By creating separate VLANs for each wireless AP, each AP would have its own broadcast domain reducing the number of devices that would receive and process the broadcast traffic, ultimately reducing the likelihood of broadcast storms. The remaining answer options would not effectively curtail the issue of broadcast storms. Disabling VLANs on all wireless APs would not solve the problem, instead it would make it worse because it would mean all APs are in the same broadcast domain. Increasing the number of wireless APs could exacerbate the problem, as this would lead to more broadcast traffic. Lastly, disabling wireless access is not a practical solution as it would prevent all wireless devices from connecting to the network.