What are two characteristics of the SLB One-arm mode？ （）
- A It is not as common as bridge mode
- B The MSFC is not directly connected to the CSM
- C Outbound traffic from servers may need to be directed by PBR or CSNAT to the CSM
- D The SLB is moved to a position where selected inbound and outbound server traffic goesthrough the SLB
- E The CSM statically routes inbound server traffic to the aggregation switch FWSM， then to the connected server subnet