Last month, you successfully merged two (2) local SAN islands into a single core/edge fabric topology
and connected storage devices to the core switches. Performance benchmarks were met or
exceeded. In recent days, server administrators have documented a slow down in performance as
I/O demands have increased. Storage administrators report that all storage ports are under-utilized.
What is the most likely explanation?

A.
conflicts between SAN routing protocols

B.
storage port buffer credit limits have restricted I/O capabilities

C.
multiple process login failures

D.
over utilitization of one or more ISLs