STP e RSTP

When a network administrator configures STP in the network, BPDU begin to be sent by switch. Which of the following statements regarding the BPDU frame are correct?

• A BPDU uses the IEEE 802.3 standard frame type.

• B. A BPDU uses the Ethernet II standard frame type.

• C. The BPDU frame’s control field is 3.

• D. The destination MAC address field of a BPDU frame is a broadcast address.

In standard STP mode, which of the following ports on non-root switches forward the BPDUs with TC bits set generated by the root switch?

• A. Root port

• B. Backup port

• C. Designated port

• D. Alternate port

Assuming all STP enabled switches have the same bridge priority. The MAC address of switch A is 00-e0-fc-00-00-40, the MAC address of switch B is 00-e0-fc-00-00-10, the MAC address of switch C is 00-e0-fc-00-00-20, and the MAC address of switch D is 00-e0-fc-00-00-80. Which switch will be elected as the root switch?

• A. Switch A

• B. Switch B

• C. Switch C

• D. Switch D

In STP, the priority of the STP root switch ranges from 0 to 65536.

• TRUE

• FALSE

During STP calculation, the port cost is associated with port bandwidth. Which of the following statements about the relation between port cost and port bandwidth is true?

• A. Port cost decreases when port bandwidth increases.

• B. Port cost increases when port bandwidth increases.

• C. Port cost is consistent with port bandwidth.

• D. Port cost varies randomly according to port bandwidth.

Which of the following descriptions about STP are incorrect? (Multiple Choice)

• A. A layer-2 switching network can have only one designated switch.

• B. All the ports of the root switch are root ports.

• C. All the ports of the root switch are designated ports.

• D. The switch with the smallest priority value is elected as non-root switch.

Refer to the graphic.

Both switches are operating using STP. With exception to those shown, all other default parameters have been maintained. Which port will be blocked?

• A. Port G0/0/1 of switch A.

• B. Port G0/0/2 of switch B.

• C. Port G0/0/1 of switch B.

• D. Port G0/0/2 of switch A.

Refer to the graphic.

The switch is operating using STP. All default parameters have been maintained. Which port will be assigned a designated port role?

• A. G0/0/1 of switch A.

• B. G0/0/2 of switch A.

• C. E0/0/1 of the hub.

• D. E0/0/2 of the hub.

Which of the following descriptions about STP designated ports is correct?

• A. Designated ports forward frames destined for the root switch.

• B. Designated ports represent the path leading to the root switch.

• C. Each bridge can have only one designated port.

• D. Designated ports are responsible for sending BPDU to connected network segments.

What is the total length of the port ID in STP?

• A. 4 bits

• B. 8 bits

• C. 2 bits

• D. 16 bits