| Exam 300-115 | Question id=1391 | Layer 2 Technologies |
Refer to the exhibit.
switch#show spanning-tree vlan 1
VLAN0001
Spanning tree enabled protocol ieee
Root ID Priority 1
Address 001b.aaaa.cccc
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 1 (priority 0 sys-id-ext 1)
Address 001b.aaaa.cccc
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300 sec
Interface Role Sts Cost Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------
Fa0/1 Desg FWD 19 128.15 P2p
Fa0/2 Desg FWD 19 128.16 P2p
Fa0/3 Desg FWD 19 128.17 P2p
Fa0/4 Desg FWD 19 128.18 P2p
Fa0/5 Desg FWD 19 128.19 P2p
Fa0/6 Desg FWD 19 128.19 P2p
Why would the switch be considered as a root bridge?
| A. |
The bridge priority is 1 and all ports are forwarding | |
| B. |
The switch priority for VLAN 1 and the macro specifies “This Bridge is the root”. | |
| C. |
The bridge priority is 128.19 and all ports are forwarding. | |
| D. |
The switch priority value is zero, it has the lowest priority value for VLAN 1. |
For priority, the range is 0 to 61440 in increments of 4096; the default is 32768. The lower the number, the more likely the switch will be chosen as the root switch.