Can u provide details of certifications like CCNA securyty,voice, etc. and how will the carrer on that be? what are the job oppertunities .

I just completed my BTech with aggrigate approximatly 70%. i want to make my carrrer in either networks securyty or ethical hacking. so i jst made a choice of getting coaching for certifications CCNA securyty or voice,etc. advice me whter i chose correctly, how wud the carrer on that is going to be.