Why is it beneficial for a wireless network administrator to install an enterprise wireless gateway?

Installing an enterprise wireless gateway is beneficial for a wireless network administrator primarily because it allows for effective management of a large wireless network using minimal devices. This is critical in enterprise environments where scalability and centralized management are essential.

An enterprise wireless gateway serves as an aggregate point for wireless traffic, enabling the administrator to manage multiple access points efficiently. This consolidation helps in reducing the complexity and number of devices that need to be configured and monitored. By centralizing management functions such as security, user authentication, policy enforcement, and traffic routing, network performance can be optimized without the need to over-provision hardware.

The other options, while relevant to different aspects of network functionality, do not capture the primary advantage of an enterprise wireless gateway in streamlining network management across a large deployment. For instance, while enabling the routing of voice calls might be a function of the gateway, it is not its main purpose. Likewise, providing direct internet access to clients does not encapsulate the overarching benefits of network management. Furthermore, replacing all existing access points is not a requirement; instead, the gateway enhances the existing infrastructure by working in conjunction with those access points.