The concept of faster-than-light (FTL) travel is currently purely speculative and not supported by our current understanding of physics. According to our current knowledge, the theory of relativity sets a cosmic speed limit, where nothing with mass can travel faster than the speed of light in a vacuum.
However, if hypothetically, humans were to achieve some form of FTL travel in the future, it is challenging to predict the exact mechanisms or technologies that would be involved. There are various speculative theories and concepts proposed in science fiction and theoretical physics, but they are largely hypothetical and purely imaginative at this point.
Some speculative ideas that have been explored in science fiction include warp drives, wormholes, and hyperspace. Warp drives involve manipulating spacetime to create a "warp bubble" that allows a spacecraft to travel faster than light within the bubble while obeying the local speed of light outside. Wormholes, on the other hand, are hypothetical tunnels in spacetime that could potentially connect distant parts of the universe, allowing for rapid travel between them. Hyperspace refers to a higher-dimensional space through which a spacecraft could travel to bypass the limitations of normal spacetime.
However, it's important to emphasize that these concepts are purely theoretical and highly speculative. They involve manipulating or traversing exotic phenomena like negative energy, higher dimensions, or unexplored aspects of physics. Whether such possibilities will ever become feasible or even theoretically possible is still uncertain and would require major breakthroughs in our understanding of physics.
Until such breakthroughs occur, our current understanding of physics suggests that interstellar travel will remain constrained by the speed of light, making space exploration a significant challenge that may require alternative approaches such as generation ships, where multiple generations of people travel together on a spacecraft, or exploring the potential of unmanned probes and robotic exploration.