GNS3 Cisco hardware emulator
is very useful application for your Cisco CCNA preparations allow you to create virtual training lab without buying cisco hardware.
CCNA, CCNP, CCIE cisco equipment emulator. GNS3 emulator is for FREE once you've donwload it you gonna need cisco switch and router ios images.
Recommended IOS images
Routers:
2600xm ccna - ccnp
2800
3725
1921
switches:
never buy 1900
2950 - Layer 2
3500xl - L 2
3550 - Layer3 big & heavy
3560 - L3
*included hardware buying tips
Google for GNS3 files as:
c2691-advipservicesk9-mz124-15.bin
c3640-ik9o3s-mz124-13.bin
c3660-jk9o3s-mz.124-25d.bin
C3725-AD.BIN
c3745-adventerprisek.124-25d.bin
c7200-jk9s-mz.124-13b.bin
Cisco Hardware HW examples
Cisco router 2600 series
cisco 3500xl router
