填空题 11.  You should design the VPN to meet an organization's requirements for availability. The design should provide a level of high availability that is commensurate with the ______ of meeting availability needs. 设计VPN满足企业或机构的可用性需求。这种设计应当在高可用性的等级与满足可用性需求所带来的______之间寻找一种平衡