Which of the following is a requirement for firewall configuration standards?

The correct answer emphasizes the critical role that firewalls play in protecting an organization's internal network from external threats. A firewall deployed between the internet connection and the internal network creates a defined boundary that helps prevent unauthorized access to sensitive data and internal systems. This placement is essential because it ensures that any incoming traffic from the internet is first evaluated against the firewall's security rules before it can reach the internal network.

This approach aligns with best practices for network security, highlighting a layered defense strategy that minimizes risks associated with potential intrusions. Deploying a firewall at this strategic location allows for better monitoring, control of incoming and outgoing traffic, and the ability to implement specific security policies that safeguard the internal network.

In contrast, options suggesting firewalls located solely in other contexts, like only at the main office or multiple firewalls at the browser level, do not provide the same robust protection or could lead to gaps in security coverage. An overly simplified approach, such as using a single firewall for all systems, may also not address the need for segmented security across different network zones, which is critical for defending against various attack vectors. Hence, the placement and configuration of firewalls is vital in developing an effective network security posture.