: The standard binary executable extension that the switch hardware bootloader decompresses during the power-on self-test (POST) phase. Core Enhancements and Feature Sets
To upgrade your Catalyst 2960-S to 15.2(2)E9, use the following steps: c2960s-universalk9-mz.152-2.e9.bin
The C2960S-UNIVERSALK9-MZ.152-2.E9.BIN is a universal software image for the Cisco Catalyst 2960S series switches. The software image is a binary file that contains the Cisco IOS software, which is used to manage and configure the switch. : The standard binary executable extension that the