Network Engineer

Training and on-the-job experience are the only ways to become a network admin. Here are some steps:
Learn about how network protocols help to make a network work properly. L1, L2, L3 and L4.
Ethernet - L2 routing, ARP, STP, etc. IP - L3 routing, RIP, OSPF, etc. TCP/UDP - How packets are built and interact with the network. You would then learn vendor-specific tools/commands to make a network work and route packets correctly. At the end of the day, all networks work the same way, the only difference is what commands specific hardware required to make them work. I would also look into how network services like DNS, DHCP, PXE, etc. Work so you will be able to better troubleshoot issues. * To become a sysadmin you have to do following courses.
1- You should complete your graduation
2- Do A+ hardware course (basics in hardware)
3- Do MCITP course (Microsoft Windows)
4- Now you can find a job in sysadmin easily.
5- If you want a higher course you can go for CCNA, CCNP and security courses.

MCA is most commonly preferred by the graduates after BCA. Those who have completed BCA or Bachelors degree in any discipline are eligible to join for the MCA courses. There are many other options for the BCA graduates in higher studies. They are:
Master of Computer Application (MCA)
Masters in Computer Management
Masters Degree in Information Management (MIM)
Masters in Business Administration (MBA)
Master of Science in Information Technology M.Sc. IT)
G-CAT Master
Postgraduate Diploma in Computer Applications
Post Graduate Programme in Corporate Studies (PGPCS)
Postgraduate Diploma in Management (PGDM)
programme in Information Security Management
You should select a course you feel comfortable doing/studying, and where your interests lie. Regards.