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Which of the following is a Cisco proprietary protocol used for negotiating a common trunking mode between two switches?
DTP
VTP
CDP
ISL
Dynamic Trunking Protocol "DTP" is a Cisco prorietry protocol used to negotiate trunk links between two switches. VTP is a VLAN Trunking Protocol used for managing VLAN information over a domain of switches. ISL (Inter-Switch Link )is a Cisco-proprietary protocol for identifying the VLAN of frames that pass over a trunk link. CDP is a Cisco propriety protocol used to discover and collect information about Cisco collected devices.
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