Final answer:
In a correctly configured wireless mesh network, the error type that should be zero is collisions. While minimizing collisions is the goal, it's not always completely avoidable due to the reality of wireless communication.
Step-by-step explanation:
In a correctly configured wireless mesh network, the type of error that should be zero is collisions (B). Wireless mesh networks are designed to minimize collisions through the use of protocols like CSMA/CA (Carrier Sense Multiple Access/Collision Avoidance). However, it is important to understand that while collisions are minimized, they are not always entirely preventable, especially in environments with many devices. Hence, the objective is to reduce collisions to the greatest extent possible.
Nevertheless, it should be noted that having zero errors or signal interference is also favorable but not entirely realistic due to the nature of wireless communication. Latency issues (D) can also affect network performance but are not typically classified as errors in the network configuration sense.