What is a common characteristic of a fully meshed VPN configuration?

In a fully meshed VPN configuration, a defining characteristic is that every site connects directly to every other site. This means that every participant in the network has a dedicated connection with all other participants. As a result, this setup facilitates direct communication among all sites, which can enhance performance and redundancy because traffic can be routed directly without needing to pass through a central point.

This direct connectivity can lead to lower latency and improved speed in communications between sites since data does not need to be relayed through a central hub. However, it's important to recognize that this design increases complexity and the number of necessary connections. In a fully meshed configuration, the number of IPsec tunnels grows significantly, typically calculated by the formula (n*(n-1))/2, where n is the number of sites. This is in contrast to a hub and spoke configuration, which requires fewer tunnels as all traffic routes through a central hub.

The other options describe aspects that do not pertain to the full mesh structure. A hub and spoke configuration, for example, centralizes traffic, while smaller networks may not require the complexity of a fully meshed setup. Thus, the essence of a fully meshed VPN configuration is rooted in its comprehensive interconnectivity among all sites.