What Port Type Is Used to Interconnect Switches in a Switch Stack?
1. Which ii network design features require Spanning Tree Protocol (STP) to ensure correct network operation? (Choose ii.)
static default routes
implementing VLANs to contain broadcasts
redundant links between Layer 2 switches*
link-state dynamic routing that provides redundant routes
removing single points of failure with multiple Layer 2 switches*
2. What is the consequence of a Layer 2 broadcast storm?
Routers volition take over the forwarding of frames as switches become congested.
New traffic is discarded past the switch because it is unable to be processed.*
CSMA/CD will cause each host to continue transmitting frames.
ARP broadcast requests are returned to the transmitting host.
3. What is the purpose of the Spanning Tree Protocol (STP)?
prevents Layer two loops*
prevents routing loops on a router
creates smaller collision domains
creates smaller broadcast domains
allows Cisco devices to exchange routing tabular array updates
iv. What is a feature of a Layer 2 loop?
Broadcast frames are forwarded dorsum to the sending switch.*
The Time-to-Alive aspect of a frame is set to infinity.
Routers continually frontwards packets to other routers.
A switch is continually forwarding the same unicast frame.
5. What additional information is contained in the 12-bit extended organisation ID of a BPDU?
MAC address
VLAN ID*
IP address
port ID
six. Which iii components are combined to grade a bridge ID?
port ID
IP accost
extended system ID*
MAC accost*
bridge priority*
cost
7. Refer to the showroom.
Which switch volition be elected the root bridge and which switch will identify a port in blocking mode? (Cull two.)
SW1 volition get the root bridge.
SW2 will become the root bridge.
SW2 volition become a port blocked.
SW4 will get a port blocked.*
SW3 will become the root span.*
SW4 volition become the root bridge.
eight. Refer to the exhibit.
Which trunk link will not frontward whatever traffic after the root bridge election process is complete?
Trunk1
Trunk2*
Trunk3
Trunk4
9. Which protocol provides up to 16 instances of RSTP, combines many VLANs with the same concrete and logical topology into a common RSTP instance, and provides support for PortFast, BPDU guard, BPDU filter, root baby-sit, and loop baby-sit?
STP
Rapid PVST+
PVST+
MST*
10. Which Cisco switch feature ensures that configured switch edge ports do not cause Layer 2 loops if a port is mistakenly connected to another switch?
BPDU baby-sit*
extended system ID
PortFast
PVST+
xi. Which ii types of spanning tree protocols can crusade suboptimal traffic flows because they assume but ane spanning-tree case for the entire bridged network? (Choose two.)
STP*
Rapid PVST+
PVST+
MSTP
RSTP*
12. Which spanning tree standard supports but one root bridge so that traffic from all VLANs flows over the same path?
Rapid PVST
802.1D*
MST
PVST+
13. What is an advantage of PVST+?
PVST+ requires fewer CPU cycles for all the switches in the network.
PVST+ reduces bandwidth consumption compared to traditional implementations of STP that utilize CST.
PVST+ optimizes performance on the network through autoselection of the root span.
PVST+ optimizes operation on the network through load sharing.*
xiv. In which ii port states does a switch learn MAC addresses and process BPDUs in a PVST network? (Choose 2.)
blocking
disabled
forwarding*
learning*
listening
15. If no bridge priority is configured in PVST, which criteria is considered when electing the root bridge?
lowest IP accost
lowest MAC address*
highest IP accost
highest MAC address
16. Which RSTP ports are continued to end devices?
trunk ports
designated ports
root ports
border ports*
17. A network administrator is preparing the implementation of Rapid PVST+ on a production network. How are the Rapid PVST+ link types determined on the switch interfaces?
Link types are determined automatically.*
Link types must be configured with specific port configuration commands.
Link types tin can only be determined if PortFast has been configured.
Link types can but be configured on access ports configured with a single VLAN.
eighteen. Which port country will switch ports immediately transition to when configured for PortFast?
listening
learning
forwarding*
blocking
19. Which STP priority configuration would ensure that a switch would always be the root switch?
spanning-tree vlan ten priority 0*
spanning-tree vlan 10 priority 61440
spanning-tree vlan x root chief
spanning-tree vlan x priority 4096
20. Refer to the showroom.
What is the role of the SW3 switch?
designated switch
border switch
root bridge*
enabled span
local bridge
21. To obtain an overview of the spanning tree status of a switched network, a network engineer issues the show spanning-tree command on a switch. Which two items of information will this command display? (Choose two.)
The root bridge BID.*
The function of the ports in all VLANs.*
The condition of native VLAN ports.
The number of broadcasts received on each root port.
The IP address of the direction VLAN interface.
22. What port blazon is used to interconnect switches in a switch stack?
StackWise*
root
designated
edge
23. Match the spanning-tree feature with the protocol type. (Not all options are used.)
PVST+ = Cisco implementation of IEEE 802.1D
RSTP = Fast converging enhancement of IEEE 802.1D
MSTP = IEEE standard that reduces the number of STP instances
Rapid PVST+ = Proprietary per VLAN implementation of IEEE 802.1w
24. Fill in the blank. Do not use abbreviations.
The spanning-tree "mode rapid-pvst" global configuration command is used to enable Rapid PVST+.
25. Open the PT Activity. Perform the tasks in the activity instructions and so answer the question.
Which switch is the root span?
Switch_1
Switch_2
Switch_3
Switch_4*
Source: https://www.ccna6.com/ccna3-v6-0-chapter-3-exam-answers/
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