This is the primary version number. The 03.11.04.E indicates it is part of the Cisco IOS XE Release 3.11.xE train. The E signifies this is an extended maintenance (EM) release intended for enterprise features. The specific 04 number indicates this is a maintenance build.
: The "universalk9" designation means it contains a universal software image that includes "k9" (strong) payload encryption, supporting various feature sets like IP Base or Enterprise Services depending on your license.
: Provides hardware-based security using Security Group Tags (SGTs) for role-based access control. cat4500e-universalk9.spa.03.11.04.e.152-7.e4.bin
: Specifies the feature set. This is a "Universal" image that contains all features. The "k9" designation means it supports payload encryption (triple DES/AES).
: Support for SSH, SSL, and encrypted VPNs. This is the primary version number
This software bundle was part of Cisco's effort to modernize the Catalyst 4500-E, especially for enterprise access and aggregation needs.
Compare the generated string against the official hash provided on the Cisco Software Download portal. Standard Boot Configuration Change The specific 04 number indicates this is a maintenance build
No. 4500-X uses cat4500x prefix.