Network Devices

Correct Answer: Quality of Service (QoS) enabled router

The best answer to manage network traffic efficiently in this scenario is 'Quality of Service (QoS) enabled router.' The QoS-enabled router can prioritize network traffic based on factors like applications or data type. This enhances the experience with video conferencing by ensuring these applications get the bandwidth they need during periods of high network usage. On the other hand, 'Unmanaged switch' cannot prioritize data packets since it simply passes on the data without processing it. 'Firewall' is primarily used to block or allow specific traffic, not to manage network traffic. Finally, a 'Hub' operates in a way that it sends the data packets to all connected devices, hence not efficient for handling heavy network traffic like in video conferencing.

Correct Answer: Firewall

The best device to configure to ensure servers are accessible via VPN only is the 'Firewall'. A firewall can be set up to limit access to the system to VPN connections only, increasing the company's security by preventing direct Internet access to the servers. 'Router' is not the best answer because while routers can be capable of handling VPN traffic, they are not primarily designed to enforce security policies like a firewall. 'Layer 2 switch' and 'Wireless access point' are incorrect because they have to do with local network traffic and wireless networking respectively, they do not inherently provide or control VPN access.

Correct Answer: Wireless Router

The best device for this office situation would be a Wireless Router. A wireless router combines the functionalities of a router and a wireless access point, allowing the computers to connect to the network, share a printer, and get wireless access. A Switch is incorrect because while it can connect multiple devices on a network, it doesn't provide wireless access or share printers. A Hub, similar to a switch, lacks the ability to provide wireless access or directly share printers. Lastly, a Firewall is a network security device that monitors and controls incoming and outgoing network traffic based on predetermined security rules, rather than connecting devices or providing wireless access.