多项选择题 Part of the job as a network administrator is being able to make a distinction between routed protocols and routing protocols. Which of the following statements is true regarding them?（）

单项选择题 What does a Layer 2 switch use to decide where to forward a received frame?（）

单项选择题 What does a Layer 2 switch do if it receives a frame with a destination MAC address that is not found in its MAC address table?（）