Refer to the exhibit. After the listed commands are entered into router R1 and switch S1, the administrator enters the show interface fa0/1 trunk and gets the results shown. What is the likely problem?

Refer to the exhibit. After the listed commands are entered into router R1 and switch S1, the administrator enters the show interface fa0/1 trunk and gets the results shown. What is the likely problem?

• The trunk is established, but no VLANs have been configured to use it.
• The router is missing the dynamic trunking protocol statements necessary to form a trunk.
• The trunk has not been established because the router does not support dynamic trunking protocol.
• The router, the switch, or both must be configured with the dynamic desirable option for dynamic trunking protocol to establish a trunk.

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