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Which port state will switch ports immediately transition to when configured for PortFast?
- listening
- learning
- forwarding
- blocking
forwarding
What value determines the root bridge when all switches connected by trunk links have default STP configurations?
- MAC address
- VLAN ID
- bridge priority
- extended system ID
MAC address
Which three port states are used by Rapid PVST+? (Choose three.)
- forwarding
- listening
- trunking
- blocking
- discarding
- learning
forwarding
discarding
learning
What is one way to correct a spanning tree failure?
- Replace the cables on failed STP links.
- Insert redundant links to replace the failed STP links.
- Manually remove redundant links in the switched network.
- Replace all instances of STP with RSTP.
Manually remove redundant links in the switched network.
An administrator is troubleshooting a switch and wants to verify if it is a root bridge. What command can be used to do this?
- show startup-config
- show spanning-tree
- show running-config
- show vlan
show spanning-tree
After the election of the root bridge has been completed, how will switches find the best paths to the root bridge?
- Each switch will analyze the port states of all neighbors and use the designated ports to forward traffic to the root.
- Each switch will analyze the sum of all port costs to reach the root and use the path with the lowest cost.
- Each switch will analyze the BID of all neighbors to reach the root and use the path through the lowest BID neighbors.
- Each switch will analyze the sum of the hops to reach the root and use the path with the fewest hops.
Each switch will analyze the sum of all port costs to reach the root and use the path with the lowest cost.
During the implementation of Spanning Tree Protocol, all switches are rebooted by the network administrator. What is the first step of the spanning-tree election process?
- Each switch with a lower root ID than its neighbor will not send BPDUs.
- Each switch determines the best path to forward traffic.
- All the switches send out BPDUs advertising themselves as the root bridge.
- Each switch determines what port to block to prevent a loop from occurring.
All the switches send out BPDUs advertising themselves as the root bridge.
When PVST is running over a switched network, which port state can participate in BPDU frame forwarding based on BPDUs received, but does not forward data frames?
- forwarding
- disabled
- blocking
- listening
listening
What additional information is contained in the 12-bit extended system ID of a BPDU?
- port ID
- IP address
- VLAN ID
- MAC address
VLAN ID
What is an accurate description of redundancy?
- Configuring a switch with proper security to ensure that all traffic forwarded through an interface is filtered
- Configuring a router with a complete MAC address database to ensure that all frames can be forwarded to the correct destination
- Designing a network to use multiple virtual devices to ensure that all traffic uses the best path through the internetwork
- Designing a network to use multiple paths between switches to ensure there is no single point of failure
Designing a network to use multiple paths between switches to ensure there is no single point of failure
Which is the default STP operation mode on Cisco Catalyst switches?
- MST
- Rapid PVST+
- RSTP
- PVST+
- MSTP
PVST+
Which two concepts relate to a switch port that is intended to have only end devices attached and intended never to be used to connect to another switch? (Choose two.)
- extended system ID
- PVST+
- bridge ID
- PortFast
- edge port
PortFast
edge port
Which STP port role is adopted by a switch port if there is no other port with a lower cost to the root bridge?
- designated port
- root port
- disabled port
- alternate
Which two statements describe a switch port that is configured with PortFast? (Choose two.)
- The switch port sends DHCP requests before transitioning to the forwarding state.
- The switch port immediately processes any BPDUs before transitioning to the forwarding state.
- The switch port immediately transitions from the listening to the forwarding state.
- The switch port should never receive BPDUs.
- The switch port immediately transitions from blocking to the forwarding state.
The switch port should never receive BPDUs.
The switch port immediately transitions from blocking to the forwarding state.