(LCR) Local continuous Replicating, Which simply, is a new data redundancy and availability technique offered in Exchange 2007 server.
(CCR) Clustered Continuous Replication is the techniques to keep a copy of storage group on another server and sinking the log files to both
SG (storage Group) Process is known shipping synchronizes the storage groups' copies
LCR Server 64 bit server running exchange, maintains the duplicate of SG on another volume in the same Physical server.
64 bit server running exchange,
copy of SG is being maintained on Different Physical server.