check ios yang digunakan :)

Hardware Plateform
The first part tells about the hardware Plateform supported by the IOS.
FEATURE SET
This tells about the features supported by the IOS. This is the new and improved naming convention of Cisco IOS, some older version still use letters to describe the features. The “Legacy naming convention” can be quite confusing, so it’s good they decided to change the naming convention. Cisco distributes IOS packages according their features, take a look at the following diagram:



The higher the features set, the more features it has. You can check the features of Cisco IOS image with the tool provided by Cisco.Access the tool at cisco site, and you can search by features, IOS image name, platform, product code, and you can even compare features between images. Great tool you should try.
MEMORY LOCATION and COMPRESSION FORMAT
This tells you from which memory location the IOS and what format of compression it uses. Check the following for the formats:
f-flash
m-RAM
r-ROM
l-the image will be relocated at run time

And these are the compression types:
z-Zip Compression
x-mzip compression
w-”STAC” compression

MAINTENANCE RELEASE and INDIVIDUAL RELEASE

These shows the release version number of the IOS image.
RELEASE
The last part shows whether the image is T Release (new feature release identifier), S (individual release), or XR (modular packages).
You need also consider the amount of DRAM of the device. The higher the version and features of an IOS, the more DRAM you need.

You may wish to investigate the Cisco IOS Software Selector:

http://tools.cisco.com/ITDIT/ISTMAIN/servlet/index

Cisco IOS Upgrade Planner:

http://www.cisco.com/cgi-bin/Softwar....cgi?majorRel=

Cisco Software Advisor:

http://tools.cisco.com/Support/Fusion/FusionHome.do

and the Cisco Software Search Tool:

http://www.cisco.com/cgi-bin/Softwar...h/SWSearch.cgi