A network administrator is configuring an Ethernet interface on a switch that will connect to an IP phone with a PC attached to it. Which configuration will best serve this purpose?
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Set the interface to default VLAN only
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Configure only the Voice VLAN on the interface
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Configure the port with speed and duplex settings
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Configure the interface as a trunk port and allow the Voice VLAN and Data VLAN
The correct answer is 'Configure the interface as a trunk port and allow the Voice VLAN and Data VLAN'. This configuration is optimal because it supports both voice and data traffic. Voice VLANs are specialized VLANs dedicated to VoIP traffic which require prioritization and specific QoS settings to function efficiently, separate from the data traffic VLAN that the PC uses.\n\nSetting the interface to a default VLAN only does not support the separation of voice and data traffic, thus not fully utilizing the capabilities of the IP phone. Configuring only the Voice VLAN also does not support separate data VLANs for the connected PC, making network management and security policies hard to enforce. Configuring the port with speed and duplex settings does not address VLAN needs, focusing only on physical layer settings.
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What is a VLAN and why is it important for network management?
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What does QoS stand for, and how does it affect voice traffic?
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What are trunk ports and how do they function in a network?