S7700 and S9700 switches are Huawei’s modular campus switches. Compared with the S7700, what advantages does the S9700 have?
A . The S9700 provides more slots and interfaces.
B . The S9700 supports non-blocking dab switching.
C . The S9700 support the redundancy design for engines, power modules, and fans.
D . The S9700 provides dab center features such as Transparent Interconnection of Lots of Links (TRILL) and Fibre Channel over Ethernet (FCoE).
Answer: B