... “rsp-pv-mz.120-5.S.bin” is a CiscoIOS 12.0(5)S image for the RSP platforms (RSP7000 and 7500 series routers).Mainline BranchThe branch used for a particular version of Cisco IOS software. For example, CiscoIOS 12.0 ... consolidatefeatures, platforms, functionality, technology, and host proliferation from the previous ED releases. CiscoIOS main releases seek greater stability and quality. For that reason, main releases do not ... 12.0releases, the unlucky networks were, in effect, denied the opportunity to take advantage of newer CiscoIOS features introduced in major releases.11.1CT11.1CC11.111.1CA11.2 12.011.3T11.311.2P11.2F12.0T...