Each of these vlans has one host each on its port SVI on vlan 1 - ip 192.168.1.11 with snm Switch B -  Ports 3， 4 connected to ports 3 and 4 on Switch A  Port 15 connected to Port on Router.  Tasks to do  1. Use non proprietary mode of aggregation with Switch B being the initiator -- Assumed use LACP with B being in Active mode  2. Use non proprietary trunking and no negotiation -- Assumed use switchport mode trunk and switchport trunk encapsulation dot1q  3. Restrict only to vlans needed  -- Assumed either vtp pruning or allowed vlan list. vtp pruning command did not seem to work on the simulator so landed using allowed vlan list  4. SVI on vlan 1 with some ip and subnet given  5. Configure switch A so that nodes other side of Router C are accessible -- Assumed this to mean that on switch A default gatway has to be configured.  6. Make switch B the root  -- Could not get this to work. Exam hung when I tried the command spanning-tree vlan 1，21-23 priority 4096