Cisco IPS-4255-K9 Installation Guide - Page 223
Minor Update, Service Pack, Patch Release, is released as 7.03E3.
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Chapter 11 Obtaining Software IPS Software Versioning Note The 7.0(1) major update is used to upgrade 5.1(6) and later sensors to 7.0(1) If you are reinstalling 7.0(1) on a sensor that already has 7.0(1) installed, use the system image or recovery procedures rather than the major update. Minor Update A minor update is incremental to the major version. Minor updates are also base versions for service packs. The first minor update for 7.0 is 7.1(1). Minor updates are released for minor enhancements to the product. Minor updates contain all previous minor features (except deprecated features), service pack fixes, signature updates since the last major version, and the new minor features being released. You can install the minor updates on the previous major or minor version (and often even on earlier versions). The minimum supported version needed to upgrade to the newest minor version is listed in the Readme that accompanies the minor update. With each minor update there are corresponding system and recovery packages. Service Pack A service pack is cumulative following a base version release (minor or major). Service packs are used for the release of defect fixes with no new enhancements. Service packs contain all service pack fixes since the last base version (minor or major) and the new defect fixes being released. Service packs require the minor version. The minimum supported version needed to upgrade to the newest service pack is listed in the Readme that accompanies the service pack. Service packs also include the latest engine update. For example, if service pack 7.0(3) is released, and E3 is the latest engine level, the service pack is released as 7.0(3)E3. Patch Release A patch release is used to address defects that are identified in the upgrade binaries after a software release. Rather than waiting until the next major or minor update, or service pack to address these defects, a patch can be posted. Patches include all prior patch releases within the associated service pack level. The patches roll into the next official major or minor update, or service pack. Before you can install a patch release, the most recent major or minor update, or service pack must be installed. For example, patch release 7.0(1p1) requires 7.0(1). Note Upgrading to a newer patch does not require you to uninstall the old patch. For example, you can upgrade from patch 7.0(1p1) to 7.0(1p2) without first uninstalling 7.0(1p1). OL-18504-01 Cisco Intrusion Prevention System Appliance and Module Installation Guide for IPS 7.0 11-3