CREST Practitioner Security Analyst (CPSA) Practice

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Which protocol facilitates the central management of VLANs across switches in a network?

The correct answer is: VTP

The protocol that facilitates the central management of VLANs across switches in a network is VTP, or VLAN Trunking Protocol. VTP is used in switched networks to manage the distribution of VLAN configuration information among switches. This streamlines the process of managing VLANs by allowing changes to be made on one switch, which are then propagated to all other switches within the same VTP domain. This capability is particularly beneficial in larger networks with multiple switches, as it minimizes the risk of configuration errors and ensures consistency in VLAN settings throughout the network. By using VTP, network administrators can efficiently manage the creation, deletion, and renaming of VLANs without the need to configure each switch individually. The other protocols mentioned do not serve this purpose. STP, or Spanning Tree Protocol, is used to prevent loops in Ethernet networks but does not manage VLANs. ARP, or Address Resolution Protocol, resolves IP addresses to MAC addresses and is used primarily in network communications, not for VLAN management. WPA, or Wi-Fi Protected Access, is a security protocol for wireless networks and is unrelated to VLAN management.