多项选择题 Which of the following describe private IP addresses?（）

单项选择题 TestKing has five regional offices that are located in different cities. The IT staff is evaluating WAN technologies to interconnect the regional offices to corporate headquarters. Each of the regional offices should be connected to the corporate headquarters in a hub and spoke arrangement using a packet-switched technology. Which of the following WAN technologies will fulfill these requirements?（）

多项选择题 You are a technician at TestKing. Your newly appointed TestKing trainee is setting up a new frame relay connection to a remote branch and wants to know what the valid options for frame relay LMI types are.What would your reply be?（）