Switch R1 has been configured with DTP using the desirable option. Which statement
describes Dynamic Trunking Protocol (DTP) desirable mode?

A.
The interface actively attempts to convert the link to a trunk link.

B.
The interface is put into permanent trunking mode but prevented from generating DTP
frames.

C.
The interface is put into permanent trunking mode and negotiates to convert the link into a
trunk link.

D.
The interface is put into a passive mode, waiting to convert the link to a trunk link.

E.
None of the other alternatives apply

Explanation:
In the switchport mode command, you can set the trunking mode to any of the following:
trunk—This setting places the port in permanent trunking mode. The corresponding switch
port at the other end of the trunk should be similarly configured because negotiation is not
allowed. You should also manually configure the encapsulation mode.
dynamic desirable (the default)—The port actively attempts to convert the link into trunking
mode. If the far-end switch port is configured to trunk, dynamic desirable, or dynamic auto
mode, trunking is successfully negotiated.
dynamic auto—The port converts the link into trunking mode. If the far-end switch port is
configured to trunk or dynamic desirable, trunking is negotiated. Because of the passive
negotiation behavior, the link never becomes a trunk if both ends of the link are left to the
dynamic auto default.