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(April 2010). A virtual IP address (VIP or VIPA) is an IP address that doesn't correspond to an actual physical network interface (port). Uses for VIPs include Network Address Translation (especially, One-to-many NAT), fault-tolerance, and mobility.
A 3G/4G network is one where the network meets all the 3G ITU Specifications, and also has upgraded to meet the 4g Specifications as they are ratified by the ITU. What they want to say when they Announce the 3G/4G Network is that they are ready for the future.Most engineers will tell you that they really mean they'll say anything to sell their phones. Source(s): I found some good sources for you to read if you want the serious technical background on these.hat they want to say when they Announce the 3G/4G Network is that they are ready for the future. Most engineers will tell you that they really mean they'll say anything to sell their phones. Source(s): I found some good sources for you to read if you want the serious technical background on these.