The various versions of the iPhone operating system (IOS), like Android, are characterized by a code name that identifies it. Unlike Google, however, Apple does not disclose publicly the code name of the versions of IOS, which is only now that we are able to disclose the list. The most experienced users, who are accustomed to jailbreak your iPhone, they will understand now where does the password ‘alpine’ to set the default IOS SSH connections, is the code name for the very first version of the operating system.
iPhone OS 1.0: Alpine (1.0.0 – 1.0.2: Heavenly)
iPhone OS 1.1: Little Bear (1.1.1 Snowbird, 1.1.2: Oktoberfest)
iPhone OS 2.0: Big Bear
iPhone OS 2.1: Sugarbowl
iPhone OS 2.2: Timberline
iPhone OS 3.0: Kirkwood
iPhone OS 3.1: Northstar
iPhone OS 3.2: Wildcat (iPad only)
iPhone OS 4.0: Apex
iPhone OS 4.1: Baker
iPhone OS 4.2: Jasper (4.2.5 – 4.2.10: Phoenix)
iPhone OS 4.3: Durango
iPhone OS 5.0: Telluride
iPhone OS 5.1: Hoodoo