Computers & IT (Non-Engg)

Fresher CCNA starting salary is between 15 to 25 K PM. If you are an electronic engineer you may able to draw a better starting salary.

CCNA certification validates the ability to understand, configure, operate, configure and troubleshoot medium-level switched and routed networks and also includes the verification and implementation of connections via remote sites using WAN. Apart from the core CCNA certification, CISCO also provides specialized certifications like CCNA Voice, CCNA Wireless and CCNA Security to recognize specific expertise in the corresponding area of computer networking. Just for your information, CCNA certification is valid for three years after which candidates need to re-establish their qualification.

Both are in good demand you need to have good % in your graduation that's it

Game designing is a creative activity where you work on your idea and develop game concepts and high level requirements of game. It then lead to technical design of game. Once technical design is over developers develop( write software code) game. Development also include game software testing.

While some of the basics might be same, the indepth course structure could differ. I would suggest to check the course structure of respective university for both.