Which statement is correct about the internetwork shown in the diagram?
A.
Switch2 is the root bridge.
B.
Spanning Tree is not running.
C.
HostD and Server1 are in the same subnet.
D.
No collision can occur in traffic between Host B and Host C.
E.
If Fa0/0 is down on Router1, HostA cannot access Server1.
F.
If Fa0/1 is down on Switch3, HostC cannot access Server 2.
Switch 2 cannot be the root bridge because all ports of root bridges are designated ports. In the diagram switch 2 has one blocked port -> It is not the root bridge -> A is not correct.
Because Switch 2 has a blocked port so surely Spanning Tree Protocol is running -> B is not correct.
Host D belongs to VLAN 2 while Server 1 belongs to VLAN 3 so they are not in the same network -> C is not correct.
Host B & host C are connected through a hub so they are in the same collision domain and collision can occur -> D is not correct.
We need a router to allow different VLANs to communicate with each other. This router is called “router on a stick”. In this case it is Router1. The link between Router1 and Switch1 is configured as trunk link. If this link is down, different VLANs cannot communicate with each other -> E is correct.
If Fa0/1 is down on Switch3, Spanning Treel Protocol will “open” the blocked port on Switch 2 can Host C can access Server 2 through HostC -> Hub1 -> Switch2 -> Switch1 -> Router1-> Switch1 -> Server2 (notice that it must go through Router1 because they are in different VLANs). So F is not correct.