Exam 200-301 topic 1 question 241 discussion

The key word here is “actively attempt” therefore only desirable is work, then the given answer is correct which is relevant to the question.

An engineer requires a switch interface to actively attempt to establish a trunk link with a neighbor switch. What command must be configured? actively Actively ACTIVELY ACTIVELY IS EQUIVALENT TO DESIRABLE, THE SAME WAY THAT PASSIVE RELATES TO AUTO.

the keyword is ( Actively )

B is correct

Answer B is correct

It's B. Answer is right there in the reference ink.

Ref: Dynamic Trunking Protocol – Wikipedia “... Switch port modes ... • Dynamic Auto — Makes the Ethernet port willing to convert the link to a trunk link. The port becomes a trunk port if the neighboring port is set to trunk or dynamic desirable mode. This is the default mode for some switchports. • Dynamic Desirable — Makes the port actively attempt to convert the link to a trunk link. The port becomes a trunk port if the neighboring Ethernet port is set to trunk, dynamic desirable or dynamic auto mode. …” A. switchport mode trunk Wrong answer. B. switchport mode dynamic desirable Correct answer. C. switchport nonegotiate Wrong answer. D. switchport mode dynamic auto Wrong answer.

B is correct

B is right because Desirable actively attempts to establish a trunk port while Auto is looking for it's neighbor if it has trunk or desirable mode enabled

AUTO PAgP mode places a LAN port into a PASSIVE negotiating state, in which the port responds to PAgP packets it receives but does not initiate PAgP negotiation. (Default) DESIRABLE PAgP mode places a LAN port into an ACTIVE negotiating state, in which the port initiates negotiations with other LAN ports by sending PAgP packets.

B is correct because its asking what configuration would have the switch "actively" form a trunk

B IS CORRET

Makes the interface actively attempt to convert the link to a trunk link. The interface becomes a trunk interface if the neighboring interface is set to trunk, desirable, or auto mode

B is correct

The answer D "Dynamic auto" tells switch to sit there and wait on the other switch to start the negotiation. So it's wrong.

Command: switchport mode dynamic desirable, which asks the switch to both negotiate as well as to begin the negotiation process, rather than waiting on another device. Thus B.

A,B,D all is work