However, by using the embedded IP replication, this behavior can be eliminated with the  enhanced parallelism of the data flow by using multiple virtual connections (VC) that share IP  links and addresses. The artificial intelligence engine can dynamically adjust the number of  VCs, receive window size, and packet size to maintain optimum performance. While the  engine is waiting for one VC’s ACK, it sends  more packets across other VCs. If packets are  lost from any VC, data is automatically retransmitted, as shown in Figure 11-96. For more information about this technology, see  IBM Storwize V7000 and SANSlide  Implementation , REDP-5023. With native IP partnership, the following Copy Services features are supported: Referred to as  synchronous replication , MM provides a consistent copy of a source  volume on a target volume. Data is written to the target volume synchronously after it is  written to the source volume so that the copy is continuously updated.  Referred to as  asynchronous replication , GM provides a consistent copy of a source  volume on a target volume. Data is written to the target volume asynchronously so that the  copy is continuously updated. However, the copy might not contain the last few updates if  a DR operation is performed. An added extension to GM is GM with Change Volumes. GM  with Change Volumes is the preferred method for use with native IP replication. GLYPH<SM590000> Global Mirror and GM with Change Volumes GLYPH<SM590000> Metro Mirror Figure 11-96 Optimized network data flow by using Bridgeworks SANSlide technology Figure 11-95 Typical Ethernet network data flow 576  Implementing the IBM System Storage SAN Volume Controller with IBM Spectrum Virtualize V8.2.1