Is there good scope for Cyber security engineer who has done networking?

Ethical hacking is generally used as penetration testing to detect vulnerabilities, risk and identify the loopholes in a security system and to take corrective measures against those attacks. Ethical hacking is a key component of risk evaluation, auditing, and counter-frauds.

"Cyber Security" sounds pretty fascinating right? But it is not going to help you anywhere. Probably you will not get a job. If there are 10 students with Certifications like CEH, LPT etc, 9/10 will not get a job.

Boy if you want to make your career with strong foundation, go for CCIE Security Course if Network Security excites you or choose to go for Java/PHP if you are interested in programming.

Someone rightly said, "Hackers are masters in some fields, and then they become hackers."

you said that you have seen it in great demand.

Great!

You must have read some articles written on internet, written by some dumbass bloggers with no practical knowledge of how industry works.