What should a network administrator configure if Host C is unable to ping Host D due to switch issues?

What should a network administrator configure if Host C is unable to ping Host D due to switch issues?

• A. Change Host C's VLAN
• B. Configure trunk port to dynamic desirable mode
• C. Increase the STP priority
• D. Disable port security features

Answer: (B)

The correct choice involves configuring a trunk port to dynamic desirable mode, which is pivotal in ensuring proper VLAN communication across switches. In a scenario where Host C cannot ping Host D due to issues related to the switch, it's likely that the VLANs the hosts are on are not properly communicating with each other. This could be due to the fact that the connecting port between switches is not properly set to allow VLAN traffic. By configuring the trunk port to dynamic desirable mode, the switch port will actively attempt to negotiate trunking with the attached device. This mode is part of Dynamic Trunking Protocol (DTP), which allows the port to dynamically establish a trunk link if the other end supports it. If Host C and Host D are in different VLANs, ensuring that the trunking is configured correctly allows traffic for those VLANs to traverse the link between switches, thus enabling proper communication. VLAN configuration is essential for network segmentation and ensuring that devices on different VLANs can communicate under the right circumstances, and dynamic desirable mode helps facilitate that process by managing how VLAN information is passed between the switches.

The correct choice involves configuring a trunk port to dynamic desirable mode, which is pivotal in ensuring proper VLAN communication across switches. In a scenario where Host C cannot ping Host D due to issues related to the switch, it's likely that the VLANs the hosts are on are not properly communicating with each other. This could be due to the fact that the connecting port between switches is not properly set to allow VLAN traffic.

By configuring the trunk port to dynamic desirable mode, the switch port will actively attempt to negotiate trunking with the attached device. This mode is part of Dynamic Trunking Protocol (DTP), which allows the port to dynamically establish a trunk link if the other end supports it. If Host C and Host D are in different VLANs, ensuring that the trunking is configured correctly allows traffic for those VLANs to traverse the link between switches, thus enabling proper communication.

VLAN configuration is essential for network segmentation and ensuring that devices on different VLANs can communicate under the right circumstances, and dynamic desirable mode helps facilitate that process by managing how VLAN information is passed between the switches.