Which pairs of trunking modes will function to establish a trunk link between two switches?

Which pairs of trunking modes will function to establish a trunk link between two switches?

• A. Access-access
• B. Dynamic desirable-dynamic auto
• C. Dynamic desirable-trunk
• D. Dynamic desirable-dynamic desirable

Answer: (C)

The establishment of a trunk link between two switches requires the use of compatible trunking modes that allow for the negotiation or establishment of the trunk. The dynamic desirable-trunk mode combination is effective for this purpose. When one switch is set to dynamic desirable mode, it actively tries to form a trunk link and will initiate the negotiation process. If the other switch is configured to trunk mode, it is ready to establish a trunk without additional negotiation. This pairing allows the two switches to automatically establish a trunk link in a reliable manner, ensuring that VLAN information is properly transmitted between them. The other mode combinations do not facilitate a trunk connection as effectively. For instance, dynamic desirable-dynamic auto allows one switch to actively seek to form a trunk while the other switch is in a passive state, waiting to respond to trunk negotiation requests rather than initiating them. Access-access mode would not work since access mode does not allow trunking, meaning each switch would only carry traffic for a single VLAN. While dynamic desirable-dynamic desirable would keep both switches actively seeking a trunk link, it could lead to negotiation conflicts that prevent a trunk from being formed. Thus, the dynamic desirable-trunk combination is the most straightforward and effective for establishing a trunk link between switches.

The establishment of a trunk link between two switches requires the use of compatible trunking modes that allow for the negotiation or establishment of the trunk. The dynamic desirable-trunk mode combination is effective for this purpose.

When one switch is set to dynamic desirable mode, it actively tries to form a trunk link and will initiate the negotiation process. If the other switch is configured to trunk mode, it is ready to establish a trunk without additional negotiation. This pairing allows the two switches to automatically establish a trunk link in a reliable manner, ensuring that VLAN information is properly transmitted between them.

The other mode combinations do not facilitate a trunk connection as effectively. For instance, dynamic desirable-dynamic auto allows one switch to actively seek to form a trunk while the other switch is in a passive state, waiting to respond to trunk negotiation requests rather than initiating them. Access-access mode would not work since access mode does not allow trunking, meaning each switch would only carry traffic for a single VLAN. While dynamic desirable-dynamic desirable would keep both switches actively seeking a trunk link, it could lead to negotiation conflicts that prevent a trunk from being formed.

Thus, the dynamic desirable-trunk combination is the most straightforward and effective for establishing a trunk link between switches.