多项选择题
A. RSVP itself provides bandwidth and delay guarantees.
B. For RSVP to be end-to-end, all devices must support RSVP.
C. RSVP reservations are maintained by a centralized reservations server.
D. An RSVP compatible QoS mechanism must be used to implement guarantees according to RSVP reservations.
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?（）
单项选择题 VLAN Tagging, also known as Frame Tagging, is a method developed by Cisco to help identify packets travelling through trunk links. When an Ethernet frame traverses a trunk link, a special VLAN tag is added to the frame and sent across the trunk link .How does ERS use the VLAN tag?（）