CNT150:Chapter 5: Quiz

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 switches send out BPDUs advertising themselves as the root bridge Each switch determines what port to block to prevent a loop from occurring

All switches send out BPDUs advertising themselves as the root bridge

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 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. 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 port states of all neighbors and use the designated ports to forward traffic to the root.rs to reach the root and use the path through the lowest BID neighbors.

Each switch will analyze the sum of all port costs to reach the root and use the path with the lowest cost.

What value determines the root bridge when all switches connected by trunk links have default STP configs? extended system ID VLAN ID MAC address bridge priority

MAC address

What is one way to correct a spanning tree failure? Manually remove redundant links in the switched network Replace all instances of STP with RSTP Insert redundant links to replace the failed STP links Replace the cables on failed SRP links

Manually remove redundant links in the switched network

Which is the default STP operation mode on Cisco Catalyst switches? MST MSTP Rapid PVST+ RSTP PVST+

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.) PVST+ extended system ID PortFast edge port bridge ID

PortFast edge port

Which two statements describe a switch port that is configured with PortFast? Two The switch port immediately transitions form blocking to the forwarding state 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 transition from the listening to the forwarding state. The switch port should never receive BPDUs

The switch port immediately transitions form blocking to the forwarding state The switch port should never receive BPDUs

What additional info is contained in the 12-bit extended system ID of a BPDU? port ID VLAN ID MAC address IP address

VLAN ID

Which STP port role is adopted by a switch port if there is no other port with a lower cost to the root bridge? alternate disabled port root port designated port

designated port

What is an accurate description of redundancy? designing a network to use multiple paths between switches to ensure there is no single point of failure 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 configuring a switch with proper security to ensure that all traffic forwarded through an interface is filtered/

designing a network to use multiple paths between switches to ensure there is no single point of failure

Which port state will switch ports immediately transition to when configured for PortFast? learning listening blocking forwarding

forwarding

Which three ports states are used by Rapid PVST+? Choose TWO forwarding discarding listening blocking trunking learning

forwarding listening discarding

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? listening disabled forwarding blocking

listening

AN admin is troubleshooting a switch and wants to verify if it is a root bridge. What command ca be used to do this? show spanning-tree show startup-config show vlan show running-config

show spanning-tree