多项选择题 Which two are characteristics of RSVP?（）

多项选择题 Fibre Channel, or FC, is a gigabit-speed network technology primarily used for storage networking.Fibre Channel is standardized in the T11 Technical Committee of the InterNational Committee for Information Technology Standards (INCITS), an American National Standards Institute (ANSI) Caccredited standards committee.Which two of these correctly describe Fibre Channel?（）

单项选择题 What is one of the reasons that custom QoS ACLs are recommended over automatic QoS when configuring ports on a Catalyst 6500 for use with IP phones?（）