This means an ASA image for ASA 5505 Unlimited License bundeled with the hardware and encryption feature enabled. Typically you can get these images directly from Cisco Sales like ASA5505-UL-BUN-K9. K9 means that it contains an encryption enabled license for 3DES/AES. Some images contain an extra number which indicates that image is an intrim image (in the second example that number is 11, which appears as 8.4.1(11) in the 'show version' output): Cisco Adaptive Security Appliance Software Version 8.4(1.11) Compiled on Tue 14-Dec-10 12:00 by builders System image file is 'disk0:/asa841-11-k8.bin' Whats the difference between k8 and k9 images? By the code itself, there is NO difference.
The first number is the Major Release (8), then the Minor Release (4) and finally the Maintenance Release (1).
A typical ASA image name looks like this: asa841-k8.bin or asa841-11-k8.bin After the 'asa' keyword the numbers mean the version, what it will appear like 8.4.1 in the 'show version' output. ASA Image Names Scenario 1: Most of the Customers have difficulties to understand what each numbers mean on the ASA image namings and what are the differences.
