A good understanding of network fundamentals will help you. The Cisco certifications are vendor specific but will teach you a lot of foundational knowledge. The CompTia Network+ is not vendor specific and will help you also. A good mix of both vendor-specific and general education will be the best plan. CompTia’s Security+ is a good non-vendor specific information security certification. The ISC2 CISSP is possibly the top infosec non-vendor specific certification. Remember, experience along with the education/certs is the best way to get a job in the field. So, bottom line – I would definitely recommend the CompTia certs and the Cisco CCNA with focus on the security products as a start.