Which of the following statements is NOT a limitation of traditional networks?

The statement that operations are easy across different vendors is indeed not a limitation of traditional networks. In fact, traditional networking environments can often suffer from compatibility issues when integrating equipment or services from different vendors. Each vendor may have its own network protocols, configurations, and management tools, making interoperability a challenge.

On the other hand, the other statements highlight genuine limitations of traditional networks. The complexity of network protocol implementation can lead to difficulties in management and troubleshooting; inflexible traffic path adjustments can hinder the network’s ability to adapt to changes in demand or topology; and the slow upgrade of new network services reflects how traditional systems may lag in adopting the latest innovations, restricting network performance and flexibility.

Thus, the ease of operations across different vendors is what sets the correct choice apart, showcasing a potential advantage rather than a limitation.