hello sir i have completed my btech in ece department i want do m.s in networking and security is it a good field ,what courses should i do to have good command over that subject

Good carry on, you can add value to your profile with some global certifications and project that in your profile.

You can pursue a post graduate diploma in networking and work side by side in the same field. This would give you both practical as well as theoretical exposure. You can also apply for the masters in networking and security directly even with a btech degree in ece department. Hope my answer has so