不定项选择题 3.  Which network topology is in use when multiple sites interconnect with each other dependent upon their communication needs? Each site Can have multiple connections to other sites，but there is no one site that is more important than another. If connectivity is needed between two sites that does not exist, another direct VPN connections added to the network topology. 拓扑结构判断：多个站点根据通信需要相连。每个站点存在多条与其他站点的连接，所有站点的地位是平等的。如果两个站点之间不存在所需的连接，则网络中将生成另一条直接VPN连接。