hardeepsanghera,
Good luck on your CCNA exam.
What has been posted here over the last few months -
ACLs - blocking telnet/ping(this has been discussed in GREAT detail here)
OSPF in a sing. area
RIP config
configuring interfaces with correct IP address (VLSM)
setting passwords
general trouble-shooting with very minor fixes
general switch setup
Go back a few pages and just look at the many posts here, you will see lots about sims.
I have passed both the CCNA 607 and CCNA 801 (4 sims - 2 each) and they were very straight forward sim questions, but I configured a stack of 5 routers - completly erasing them and configuring them one by one several times before taking the CCNA exam.
Once again GOOD LUCK and do not make it too hard - they are designed to be done in just a few min.
E.A. Broda
CCNA, CCDA, CCAI, Network +