HI vivek
Yes you are right computer field is very broad field which has many postings and many obstacles in it and there are fields such as
1.software line,
2.Hardware & networkinng
In software field you can be a programmer in
c,c++,java,html,web page designer,etc
In hardware &networking you can be a ethical hacker,system admin,security assistant,etc
for your field that is for security you should learn some certifications like MCSE,CCNA,RHCE,Ethical hacking etc
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Intel C2D E6500 2.2GHz,Intel D945GCNL,1Gb 800,512 Mb 800,160 Gb SATA,LG DVD-R/W,Samsung GTs3310,2Gb Micro SD