Which access control methods provides the most granular access to protected objects?

Access control lists

Access control lists enable devices in your network to ignore requests from specified users or systems, or grant certain network capabilities to them. ACLs allow a stronger set of access controls to be established in your network. The basic process of ACL control allows the administrator to design and adapt the network to deal with specific security threats. Reference: Mike Pastore and Emmett Dulaney, Security+ Study Guide, 2nd Edition, Alameda, Sybex, 2004, p 235