Individual network activities are correlated to interactions with a target web page to facilitate an analysis of the performance of the web page. During the modification, a bit field including one or more access control indicators in the entry of the active address translation data structure is not overwritten with corresponding data from the guest address translation data structure. Copying a data chunk to the point-in-time volume before a write operation modifies the data chunk on the source volume dynamically creates the point-in-time volume. 1 to 90% of a cation equivalent of the monomer, in which a rate of quaternizing of the cationic groups is not less than 40% by mole.