BCA

There is no use of doing CCNA or DBA certification after MBA IT. If you wanted to remain in the technical field, you should not have done MBA IT. After MBA IT you are ready to take Sales and Marketing, PreSales support, Business Analytics, Account Management, BA role or jobs in IT and ITES Industries.

BCS, B.Sc IT and B.Sc CS are almost equivalent degree courses with overlap of syllabus between 80% to 90%.

MCA entrance exams are competitive therefore there is guaranteed that you will get an institute of your choice. Therefore, it is advised that you do even graduation degree BCA from.a reasonably good college.

Kindly check last year's cutoff regarding this. You can check them at-
If you belong to Delhi and if you belong to General Category, then look for GNGND category in the list.

Best option will be B.tech in computer science engineering.If you choose BCA then probably you have to go for higher education because placement is very low for BCA students anywhere.

Then kindly apply for the BCA admission process in good institutes. Apart from this B.Sc IT is also another good option for you according to the information provided by you.