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300-320 · Question #55

Which technology can block interfaces and provide a loop-free topology?

The correct answer is A. STP. STP (Spanning Tree Protocol) was specifically designed to prevent Layer 2 loops in Ethernet networks with redundant links. It does so by placing redundant ports into a Blocking state, ensuring only one active path exists between any two network segments at a time, creating a…

Advanced Enterprise Campus Networks

Question

Which technology can block interfaces and provide a loop-free topology?

Options

  • ASTP
  • BVSS
  • CVLAN
  • DvPC

How the community answered

(26 responses)
  • A
    88% (23)
  • B
    8% (2)
  • C
    4% (1)

Explanation

STP (Spanning Tree Protocol) was specifically designed to prevent Layer 2 loops in Ethernet networks with redundant links. It does so by placing redundant ports into a Blocking state, ensuring only one active path exists between any two network segments at a time, creating a loop-free tree topology. VSS (Virtual Switching System) is a Cisco technology for combining two physical switches into one logical switch. VLANs segment broadcast domains but do not inherently prevent loops. vPC (Virtual Port Channel) is a Cisco Nexus technology for multi-chassis link aggregation.

Topics

#STP#loop prevention#Layer 2 topology#port blocking

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