boy, spanning tree is too fundu for ccna. Even understanding VTP is a tough time at ccna level, bcoz many people who appear for ccna are not experienced or have hands-on over devices. But they are taking a chance, hoping to get a profile where they get to work on these devices.
however, heres the command:
show spanning-tree
The output shows Root bridge MAC & priority, as well as self MAC & priority. If both are same, then that switch itself is the root bridge. otherwise "sh arp" can give u a corresponding Ip add of root switch against rootbridge mac add.
