The answer is reproductive isolation. Reproductive isolation ensures members of different species do not produce offspring. In this case, geographical separation is ensuring that individuals from the two different populations are not able to mate with each other. Eventually, through different selective pressures, the two populations will diverge sufficiently in genotype to become distinctly different.
WAN (Wide Area Network) optimization is process used to maximize the efficiency of data flow across a wide area network (WAN<span>). It includes traffic shaping, data deduplication, compression and other technologies. </span>
Wan optimization devices are deployed on either end of a WAN link to improve application response times.