Which two DTP modes will permit trunking between directly connected switches? (Choose two.)
A.
dynamic desirable (VTP domain A) to dynamic desirable (VTP domain A)
B.
dynamic desirable (VTP domain A) to dynamic desirable (VTP domain B)
C.
dynamic auto (VTP domain A) to dynamic auto (VTP domain A)
D.
dynamic auto (VTP domain A) to dynamic auto (VTP domain B)
E.
dynamic auto (VTP domain A) to nonegotiate (VTP domain A)
F.
nonegotiate (VTP domain A) to nonegotiate (VTP domain B)
weird
0
0
It follows that PagP verifies VTP domains and does not form the link if VTP domain names differ.
0
0
Pagp ? There is nothing here with etherchannel.
0
0
F: is a strange one, as nonegotiate means that it will not send out DTP messages. So it is not really describing the ‘mode’ of the port (Dynamic Auto, Dynamic Desirable, or Trunking unconditionally).
However, you cannot actually configure nonegotiate whilst the port is in a dynamic mode (The switch responds with a conflict), so it has to assumed the switch is trunking unconditionally.
You can bring up a trunk where you have configured Trunking unconditionally and the VTP domain names are different. Only when DTP will stop you bringing up a trunk if the VTP domains are different.
0
0
Note: If an interface is set to switchport mode dynamic desirable, it will actively attempt to convert the link into trunking mode. If the peer port is configured as switchport mode trunk, dynamic desirable, or dynamic auto mode, trunking is negotiated successfully -> A is correct.
B is not correct because 2 dynamic desirable mode in 2 different VTP domains cannot create a trunk link.
Dynamic auto waits to receive DTP from the neighbor so if 2 interfaces are set to this mode, none of them will receive DTP frames -> C and D are not correct.
A port in Nonegotiate mode can be set to access or trunk port mode but it will not send DTP. Dynamic auto also does not send DTP -> a trunk link cannot be created -> E is not correct.
Also, when setting ports to nonegotiate, that port will not send DTP. We can set both interfaces to trunk link -> a trunk link can be created between two different VTP domains -> F is correct.
0
0