Which two protocols can be automatically negotiated between switches for trunking? (Choose two.)

Which two protocols can be automatically negotiated between switches for trunking? (Choose two.)
A . PPP
B . DTP
C . ISL
D . HDLC
E . DLCI
F . DOT1Q

View Answer

Answer: CF

Explanation:

Switches such as the Catalyst 3550 that are capable of either 802.1Q or ISL trunking encapsulation, the switchport trunk encapsulation [dot1q | isl | negotiate] interface command must be used prior to the switchport mode trunk command.

Reference: https://learningnetwork.cisco.com/servlet/JiveServlet/previewBody/14792-102-1- 57313/ Dynamic%20Trunking%20Protocol.PDF