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midterm mod 5 cisco
| Question | Answer |
|---|---|
| Which statement describes STP? | STP is a Layer 2 loop prevention protocol for Ethernet LANS. |
| Without STP on the Ethernet LAN, which three types of frames could cause a catastrophic loop in the network? (Choose three.) | unknown unicast multicast Broadcast |
| What device is elected by the Spanning Tree Algorithm? All other switches determine a single least-cost path to this device. | root bridge |
| By default (without any configuration on a switch), what will determine which switch is the root bridge? | the MAC address of the switch |
| The root bridge will be the switch with the: | the lowest bridge ID |
| The port closest to the root bridge in terms of least overall cost (best path) to the root bridge is the: | root port |
| The port on the segment (with two switches) that has the lowest path cost to the root bridge is the: | designed port |
| Which of the following ports will forward Ethernet frames? (Choose two.) | designated port root port |
| The sum of individual port costs along the path from the switch to the root bridge is known as the: | root path cost |
| How often does a switch send a BPDU? | every 2 seconds |
| Which three STP port states are merged into the RSTP discarding port state? (Choose three.) | disabled blocking listening |
| Which protocol was designed to bring faster convergence to STP? | RSTP |
| Which technology solves the problem of a device being unable to get an IPv4 address from a DHCP server due to STP forwarding delay timers? | PortFast |
| Which port state will switch ports immediately transition to when configured for PortFast? | forwarding |
| 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 all of port costs to reach the root and use the path with the lower cost |
| Which is the default STP operation mode on Cisco Catalyst switches? | PVST+ |
| What value determines the root bridge when all switches connected by trunk links have default STP configurations? | MAC address |
| 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? | all the switches send out BPDUs advertising themselves as the root bridge |
| 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.) | edge port PortFast |
| Which three port states are used by Rapid PVST+? (Choose three.) | learning forwarding 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 |
| Which STP port role is adopted by a switch port if there is no other port with a lower cost to the root bridge? | root port |
| Which two statements describe a switch port that is configured with PortFast? (Choose two.) | the switch port should never receive BPDUs the switch port immediately transitions from blocking to the forwarding state |
| What is one way to correct a spanning tree failure? | manually remove redundant links |
| What additional information is contained in the 12-bit extended system ID of a BPDU? | VLAN ID |
| 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 spanning-tree |
| 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 |
Created by:
mjpsm