bai,
you have to schedule and go to Pearson VUE center to give exam.
i am assuming you are looking for CCNA Routing and Switching.
its broken into two parts ICND1(Exam Code:100-101) and ICND2(Exam Code:200-101).
you can take both individually or you can take a composite exam(Exam Code:200-120).
Fee depends on which way you give ICND1/ICND2 or Composite
previously it used for 150$ each for ICND1 and ICND2 or composite costs 295$.
Also it depends whats your goal, if its just to get a cert to add to your profile jugaad will be good, but if you really want to make career in networking field i would recommend to learn the basics and give exam yourself.
Thanks