IP Security (IPSec) is mandatory for IPv6implementations. Given that IPv6 will be dominated by commercial off the shelf (COTS)software products, many in the DoD community will have a software encryption capability attheir disposal.
1 The lowest monthly average temperature in Fountain Hills for December is 54 degrees. 2  The most monthly precipitation in Fountain Hills occurs in January with 0 inches.  The air quality index in Fountain Hills is 48% worse than the national average.
Arizona is a popular place for retirees to avoid winter. Phoenix and Tucson are both sunny an average of 85 percent of the time, but these cities get quite hot in the summer. In Phoenix, the temperature hits 90 degrees or higher an average of 169 days per year.Tucson is slightly cooler than Phoenix and gets more rain, which averages 12 inches annually.See The 10 Best Places to Retire in 2012 .]. Flagstaff, Ariz., is almost as sunny as Phoenix and Tucson, but unlike most other sunny places, the weather is seldom hot. The temperature only rises above 90 degrees an average of three days per year.