أختبر في q

1. How does STP prevent forwarding loops at OSI Layer 2?

A.MAC address forwarding

B.Port blocking

C.Collision avoidance.

D.TTL

Question 1 of 13

2. Which result occurs when PortFast is enabled on an interface that is connected to another switch?

A.VTP is allowed to propagate VLAN configuration information from switch to switch automatically.

B.Spanning tree may fail to detect a switching loop in the network that causes broadcast storms

C.Root port choice and spanning tree recalculation are accelerated when a switch link goes down

D.After spanning tree converges PortFast shuts down any port that receives BPDUs.

Question 2 of 13

3. Refer to the exhibit. Which switch becomes the root bridge?

A.S4

B.S1

C.S2

D.S3

Question 3 of 13

4. When using Rapid PVST+, which command guarantees the switch is always the root bridge for VLAN 200?

spanning-tree vlan 200 root primary

spanning-tree vlan 200 priority 614440

spanning-tree vlan 200 priority 0

spanning-tree vlan 200 priority 38572422

Question 4 of 13

5. What criteria is used first during the root port selection process?

A.lowest neighbor’s bridge ID

B.lowest path cost to the root bridge

C.lowest neighbor’s port ID

D.local port ID

Question 5 of 13

6. What is the primary effect of the spanning-tree portfast command?

A.It minimizes spanning-tree convergence time

B.It enables BPDU messages

C.It immediately enables the port in the listening state

D.It immediately puts the port into the forwarding state when the switch is reloaded

Question 6 of 13

7. Which configuration ensures that the switch is always the root for VLAN 750?

Switch(config)#spanning-tree vlan 750 priority 38003685

Switch(config)#spanning-tree vlan 750 priority 614440

Switch(config)#spanning-tree vlan 750 root primary

Switch(config)#spanning-tree vlan 750 priority 0

Question 7 of 13

8. Which spanning-tree enhancement avoids the learning and listening states and immediately places ports in the forwarding state?

A.BPDUfilter

B.Backbonefast

C.PortFast

D.BPDUguard

Question 8 of 13

9. Refer to the exhibit.

Switch1: 0C.E0.38.57.24.22
Switch2: 0C.0E.15.22.1A.61
Switch3: 0C.0E.15.1D.3C.9A
Switch4: 0C.E0.19.A1.4D.16

After the election process what is the root bridge in the HQ LAN?

A.Switch 3

B.Switch 1

C.Switch 4

D.Switch 2

Question 9 of 13

10. Refer to the exhibit. Which switch in this configuration will be elected as the root bridge?

SW1: 0C:E0:38:00:36:75
SW2: 0C:0E:15:22:05:97
SW3: 0C:0E:15:1A:3C:9D
SW4: 0C:E0:18:A1:B3:19

A.SW2

B.SW3

C.SW1

D.SW4

Question 10 of 13

11. Refer to the exhibit. What two conclusions should be made about this configuration? (Choose two)

A.The root port is FastEthernet 2/1

B.The spanning-tree mode is Rapid PVST+

C.The spanning-tree mode is PVST+

D.The designated port is FastEthernet 2/1

E.This is a root bridge

Question 11 of 13

12. Which state does the switch port move to when PortFast is enabled?

A.blocking

B.listening

C.forwarding

D.learning

Question 12 of 13

13. Refer to exhibit. How does SW2 interact with other switches in this VTP domain?

SW2
vtp domain cisco
vtp mode transparent
vtp password test
interface fastethernet0/1
description connection to SW1
switchport mode trunk
switchport trunk encapsulation dot1q

A.It processes VTP updates from any VTP clients on the network on its access ports

B.It forwards only the VTP advertisements that it receives on its trunk ports

C.It transmits and processes VTP updates from any VTP Clients on the network on its trunk ports

D.It receives updates from all VTP servers and forwards all locally configured VLANs out all trunk ports

Question 13 of 13