Which three pairs of trunking modes will establish a functional trunk link between two Cisco switches? (Choose three.)
- dynamic desirable – dynamic desirable
- dynamic desirable – trunk
- dynamic auto – dynamic auto
- access – dynamic auto
- dynamic desirable – dynamic auto
- access – trunk
Explanation: Dynamic Trunking Protocol (DTP) manages trunk negotiation between Cisco switch ports on a point-to-point basis. Dynamic desirable is an active mode that initiates negotiation and will successfully establish a functional trunk when the neighbor is configured in trunk, dynamic desirable, or dynamic auto modes. In contrast, if both ends are in dynamic auto, they both wait passively for the other to initiate negotiation, resulting in a non-trunking access link instead.
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