It depends on your current networking knowledge and how consistently you study.
For someone with CCNA-level understanding or basic networking experience, it usually takes around 3 to 6 months of focused preparation. If you're starting from scratch, it may take a bit longer, around 6 to 9 months.
The key is regular practice with labs and revising concepts consistently rather than rushing.
If you’re looking for structured guidance and a clear learning path, resources like SterlingNext can be helpful for staying on track.