“路由和交换”自我水平测试评估窗体顶端Please answer question 1 before continuing.Please select exactly 2 choices to question 1.1. WANs function at which two layers of the OSI model? (Choose two.)sessionnetworkphysicaltransportdata link 1. 广域网在OSI模型的哪两层上发挥作用？（选择两项。) 会话层网络层物理层传输层数据链路层窗体底端2. Which protocol routes between different autonomous systems?EGPIGPIPPIPXTCP2. 哪一协议能够在不同的自治系统之间进行路由？ EGPIGPIPPIPXTCP3. How many twisted pairs of wires are typically used
