A Software-defined networking (SDN) solution is the best option because it provides dynamic and flexible network segmentation and allows for central management, which means the IT team can quickly adapt to changes. SDN is designed to facilitate the management of network services through abstraction of lower-level functionality. This is perfect for controlling network resources because policies can be applied that dictate how traffic is handled and resources are allocated in different segments.

On the other hand, a jump server is primarily used as a secure entry point into another server or network, with less emphasis on segmentation and network resource control. VLANs provide network segmentation, but lack the centralized control and rapid flexibility that SDNs offer. Firewalls are used to protect network boundaries and enforce access policies but do not offer the same level of resource management or quick adaptability.