In the case that I have a cross site (2 sites, for example) DAG  with one Exchange server at each site, and there are 2 seperated WAN links between these 2 sites for replication

-  Can I use these 2 WAN links seperately for MAPI & Replication (one link for MAPI, one link for Replication), or do I have to use one link for both MAPI and Replication?  And pros & cons for each situation?

-  Does quorum depend on connectivity of the DAG members on the MAPI network, or on the replication network, i.e. on which network (or both) must quorum be maintained to prevent dismount of databases?