多项选择题 What components are required to directly connect two PCs so they are able to participate in a simple peer-to-per network?（）

单项选择题 Which type of cable should be used to make a connection between the Fa0/0 port on a router and the Fa0/0 port switch?（）

多项选择题 You are experiencing intermittent issues relating to congestion with your network.What are the possible causes of congestion on a LAN?（）