Before installing the IBM Tivoli Storage Manager (TSM) server on an AIX system, an administrator must check hardware and software configurations to ensure the current system meets TSM server requirements. Which two elements are essential on the administrator checklist? (Choose two.)

A.
browser revision level

B.
operating system level

C.
general parallel file system is available

D.
graphic interface is installed and working properly

E.
communication protocols are installed and configured