Spanning Tree Protocol (STP) Overview
43 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the main characteristic of PVST+ compared to original STP?

  • It is incompatible with additional port features.
  • It requires fewer configurations than standard STP.
  • It creates a separate spanning tree for each VLAN configured in the network. (correct)
  • It has a single spanning tree instance for multiple VLANs.

    • Which feature is NOT supported by PVST+?

  • BPDU Filter
  • PortFast
  • BackboneFast
  • EtherChannel Load Balancing (correct)

    • Which version of STP provides a loop-free topology with a single instance spanning tree?

  • Ethernet Spanning Tree (EST)
  • Per-VLAN Spanning Tree (PVST+)
  • Rapid Spanning Tree Protocol (RSTP)
  • Common Spanning Tree (CST) (correct)

    • What must be specifically configured on Cisco switches to utilize RSTP?

    <p>Rapid Spanning Tree mode</p> Signup and view all the answers

    Which of the following is a valid port state in the original STP?

    <p>Blocking</p> Signup and view all the answers

    What is the purpose of BPDU Guard in a network using STP?

    <p>To prevent loops by blocking ports that receive BPDUs.</p> Signup and view all the answers

    What primary advantage does RSTP have over the traditional STP?

    <p>It offers faster convergence compared to traditional STP.</p> Signup and view all the answers

    Which protocol version is an enhancement of the original STP standard and supports additional port states and configurations?

    <p>802.1D-2004</p> Signup and view all the answers

    Which protocol allows for redundant paths and loops without blocking ports?

    <p>Layer 3 Routing</p> Signup and view all the answers

    Which port state in STP is responsible for processing incoming frames but not forwarding them?

    <p>Listening</p> Signup and view all the answers

    What feature provides fast convergence in a network using Rapid PVST+?

    <p>Rapid Spanning Tree Protocol (RSTP)</p> Signup and view all the answers

    What mechanism does BPDU Guard protect against in a bridging environment?

    <p>Broadcast Storm</p> Signup and view all the answers

    Which of the following is a key benefit of using PortFast in a network?

    <p>Immediate transition to forwarding state</p> Signup and view all the answers

    What is the primary purpose of RSTP compared to traditional STP?

    <p>To provide faster convergence.</p> Signup and view all the answers

    Which port states are utilized by RSTP?

    <p>Learning, Forwarding, Discarding.</p> Signup and view all the answers

    What feature of PVST+ allows for a separate spanning tree instance for each VLAN?

    <p>Per-VLAN spanning tree instances.</p> Signup and view all the answers

    What happens when a port is configured with PortFast?

    <p>The port enters forwarding state immediately.</p> Signup and view all the answers

    Which configuration does BPDU guard enforce on switch ports?

    <p>Disables the port if it receives a BPDU.</p> Signup and view all the answers

    Which version of IOS runs PVST+ by default on Cisco switches?

    <p>IOS version 15.0 or later.</p> Signup and view all the answers

    How does Rapid PVST+ enhance RSTP functionality?

    <p>It provides a separate instance of 802.1w per VLAN.</p> Signup and view all the answers

    Which feature is not supported by PVST+?

    <p>EtherChannel bonding.</p> Signup and view all the answers

    What is a primary role of the root bridge in STP?

    <p>To manage and distribute BPDUs throughout the network.</p> Signup and view all the answers

    Which statement about STP and its implementations is true?

    <p>MSTP can map multiple VLANs to a single spanning tree.</p> Signup and view all the answers

    What is the main advantage of Rapid Spanning Tree Protocol (RSTP) compared to the original Spanning Tree Protocol (STP)?

    <p>RSTP provides faster convergence than STP.</p> Signup and view all the answers

    Which feature allows switches to quickly transition ports to the forwarding state in RSTP?

    <p>PortFast</p> Signup and view all the answers

    How does Multiple Spanning Tree Protocol (MSTP) optimize VLAN management?

    <p>By mapping multiple VLANs into the same spanning tree instance.</p> Signup and view all the answers

    Which component ensures that only the designated root bridge can receive configuration BPDUs in a RSTP environment?

    <p>Root guard</p> Signup and view all the answers

    What is the role of BPDU guard in a spanning tree protocol setup?

    <p>To err-disable ports that receive unexpected BPDUs.</p> Signup and view all the answers

    Which statement about RSTP port roles is accurate?

    <p>The same spanning tree algorithm is used for RSTP and STP.</p> Signup and view all the answers

    What distinguishes Rapid PVST+ from standard RSTP?

    <p>Rapid PVST+ supports multiple spanning tree instances for each VLAN.</p> Signup and view all the answers

    What is the function of the listening state in spanning tree protocols?

    <p>To allow BPDUs to be sent and received.</p> Signup and view all the answers

    Which protocol is designed to enhance the original STP with additional features and faster convergence specifically for Cisco environments?

    <p>PVST+</p> Signup and view all the answers

    Which of the following is a key benefit of RSTP's faster convergence?

    <p>Minimizing downtime during network topology changes.</p> Signup and view all the answers

    What is elected for each spanning tree instance in Per-VLAN Spanning Tree (PVST)?

    <p>A root bridge</p> Signup and view all the answers

    Which protocol supersedes the original Spanning Tree Protocol (STP)?

    <p>Rapid Spanning Tree Protocol (RSTP)</p> Signup and view all the answers

    How many spanning tree instances are created if all ports on switches are in the same VLAN?

    <p>One spanning tree instance</p> Signup and view all the answers

    What is crucial when referring to different implementations of spanning tree?

    <p>Referring to the protocol in context</p> Signup and view all the answers

    Which version of spanning tree did the IEEE designate in its latest documentation?

    <p>Rapid Spanning Tree Protocol (RSTP)</p> Signup and view all the answers

    Which of the following is NOT a characteristic of Per-VLAN Spanning Tree (PVST)?

    <p>Single Spanning Tree Protocol for all VLANs</p> Signup and view all the answers

    What is the primary function of the Root Bridge in STP?

    <p>To be the point of reference for path calculations</p> Signup and view all the answers

    In the context of STP, what distinguishes RSTP from traditional STP?

    <p>Faster convergence and reconfiguration</p> Signup and view all the answers

    Which statement is true regarding the function of STP in VLAN management?

    <p>It isolates traffic in different VLANs</p> Signup and view all the answers

    What happens when all ports are set to remain in the same VLAN?

    <p>It results in a single spanning tree instance</p> Signup and view all the answers

    Study Notes

    Spanning Tree Protocol (STP) Evolution

    • STP is defined under IEEE 802.1D, providing a loop-free topology for networks with redundant links.
    • Common Spanning Tree (CST) operates as a single spanning tree instance regardless of VLANs present in the network.
    • Per-VLAN Spanning Tree (PVST+) is a Cisco enhancement that creates individual spanning tree instances for each VLAN.
    • Rapid Spanning Tree Protocol (RSTP) or IEEE 802.1w enhances STP with faster convergence capabilities.

    STP Variants

    • PVST+ supports advanced features including PortFast, UplinkFast, BackboneFast, BPDU guard, filter, root guard, and loop guard.
    • RSTP maintains backward compatibility with STP and retains similar terminology, enabling easier configuration for those familiar with STP.
    • PVST+ is set as the default mode in Cisco switches running IOS 15.0 or later.

    RSTP Features

    • RSTP allows rapid convergence, capable of adjustments in a properly configured network within milliseconds.
    • RSTP port states include learning, forwarding, and discarding, differing from more extended states seen in standard STP.
    • Each VLAN can have a distinct root bridge under RSTP, compared to a singular root bridge in classic STP.

    Multiple Spanning Tree Protocol (MSTP)

    • MSTP, inspired by Cisco's proprietary MISTP, merges multiple VLANs into shared spanning tree instances.
    • MST can support up to 16 RSTP instances, optimizing configuration for networks with numerous VLANs.

    Configuration and Management

    • Rapid PVST+ is a Cisco-specific adaptation of RSTP, offering instance-based spanning tree management per VLAN.
    • BPDU guard feature disables switch ports immediately upon detecting any Bridge Protocol Data Unit to prevent possible loops.
    • Layer 2 networks can expand significantly, employing advanced hierarchical configurations that may integrate the distribution and core layers.

    Key Terminology

    • Key terms include Root Bridge, Designated Port, Alternate Port, and Bridge Protocol Data Unit (BPDU), essential for understanding spanning tree architecture.
    • PortFast enables immediate transition of switch ports from blocking to forwarding states, crucial for reducing access delay for devices requiring quick network access (e.g., DHCP clients).
    • Understanding of timers like Max Age, Forward Delay, and Hello timer is vital for effective spanning tree operation management.

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Related Documents

    Cisco SRWE Module 5 STP Concepts PDF

    Description

    This quiz covers the evolution and variants of the Spanning Tree Protocol (STP) as defined under IEEE 802.1D. Key topics include Common Spanning Tree, Per-VLAN Spanning Tree (PVST+), and Rapid Spanning Tree Protocol (RSTP). Test your knowledge on the features and functionalities of these protocols.

    More Like This

    CCNA Sunday - Spanning Tree Protocol and ARP Cache
    20 questions

    CCNA Sunday - Spanning Tree Protocol and ARP Cache

    FoolproofTopaz avatar
    FoolproofTopaz
    Spanning Tree Protocol Overview
    11 questions

    Spanning Tree Protocol Overview

    ConciliatoryNovaculite1952 avatar
    ConciliatoryNovaculite1952
    Spanning Tree Protocol Operations
    24 questions

    Spanning Tree Protocol Operations

    InventiveElPaso2510 avatar
    InventiveElPaso2510
    Spanning Tree Protocol and RSTP Overview
    24 questions

    Spanning Tree Protocol and RSTP Overview

    BlamelessRhodium653 avatar
    BlamelessRhodium653
    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser