单项选择题 WhichbridgeIDbelongstoswitch2？（）

单项选择题 WhichspanningTreeProtocolhasbeenimplementedonswitch2？（）

判断题 Network topology exhibit： 3 configuration exhibit：  You work as a network technician at . is a large international company with offices in the US and in  Europe. You work at the New York Office. Recently a new switch block with multiple VLANs configured were added to the Barcelona LAN.  Your boss at， Miss， tells you that the personal at the Barcelona office failed to document the spanning tree topology during installation. She gives you a plane ticket to Barcelona and orders to provide a baseline of configuration information in regard to the switch block spanning tree topology. Two days later you arrive at the Barcelona office. You study the network topology carefully， see exhibit. Then you connect to the   3 switch； issue the show spanning tree command. Please refer to the exhibit for the output. You are then required to answer the scenario questions using the information that is available.