This specific file, c2960l-universalk9-mz.152-7.E7.bin , is a Cisco IOS software image for the Catalyst 2960-L
From Cisco.com (CCO login required), navigate to:
Support > Switches > Catalyst 2960-L Series Switches > Software Download > 15.2.7-E7
Download c2960l-universalk9-mz.152-7.e7.bin. c2960l-universalk9-mz.152-7.e7.bin
Layer 2 Focus: Do not expect this software to enable advanced Layer 3 features. It is designed for campus and branch access where simple connectivity is the priority. This specific file, c2960l-universalk9-mz