Cisco exams are presently conducted by Pearson VUE. CCNA exam costs $250 whereas most other exam cost $150(as on Jan 2010). Exam duration is mostly two hours. Students can book their exams by appearing in the testing centre or booked online from www.vue.com
Cisco exams generally include one or two simulations in which we have to perform on simulated routers to configure or troubleshoot a scenario. It is recommended to spend maximum 10-15 minutes on a simulation and remaining time for other questions.
Sample tests provided by some sites like Testking, Actualtest and lot of other. These test help a lot in the preparation of exam.
CCIE is the one of the most prestigious certification from cisco. This certification include two exams, one is online exam conducted at any VUE testing centre. Other exam is LAB exam for which we have to appear in Cisco Examination Lab. In India this facility is presently available at Banglore.
So be prepared to appear in the test and Best of Luck.