I am a CCNA,CCNA Voice, CCNA Security , CCNA Design , CCNP and a CCNP Design. I am studying for my CCNP Security right now.
no such thing, I believe you are referring to CCDP ;-)
In any case, chances of you landing a mid- to high-paying job just with a CCNa is slim, but like you said, it is a start.
for CCNP Security you will need to first do CCNA Security before you can progress to CCNP Security. That being said, I usually give this advise to people who are just starting out in the networking space, ESPECIALLY the in the Cisco realm.
Do you CCNA RS, and then move on to you CCNP RS. While busy with that, do the foundation/associate-level certification whatever you want to specialize in, i.e. Security, Voice, Wireless, etc. this means that by the time you are done with CCNP you should have at least the foundational understanding of the specialist subject matter, and from there priogress to the professional-level certifications.
At the end of the day you need to have a solid understanding of general networking principles before you can run specialized services on them, i.e. voice, security, wireless, etc. You can't secure something if you don't know how it works, inside and out.
Another reason why I recommend the "greener' network techs to go all the way with routing and switching is because a comapny is more likely to offer someone with less experience a general network engineering job than someone applying for a specialized position.
So to recap, I suggest go CCNA > CCNP RS, and then apply for a CCNA-level position, because of the lack of practical experience. Work yourself up from there. Remember, the 4-letter credential shouldn't be the be all and end all. You focus should be to learn as much as you can on your way towards it so as to apply it in the real world.
Cheers, and good luck.