_______ is a Cisco proprietary protocol used between switches to maintain a loop-free network.

  • ARP
  • Internet Control Message Protocol (ICMP)
  • Spanning Tree Protocol (STP)
  • VLAN Trunking Protocol (VTP)
The 'Spanning Tree Protocol (STP)' is a Cisco proprietary protocol used to prevent and eliminate loops in Ethernet networks. It helps ensure network reliability by maintaining a loop-free topology.
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