which statement about DTP is true?
a. It uses the native vlan
b. It negotiates a trunk link after vtp ha been configured
c. It uses desirable mode by default
d. It sends data on vlan 1
From cisco docs, I found this
On an ISL trunk, DTP packets are sent on VLAN1. This is the case even if VLAN 1 has been cleared from the trunk and is no longer the native VLAN. On an 802.1Q trunk, DTP packets are sent on the native VLAN. This is the case even if the native VLAN has been cleared from the trun
reference link: https://www.cisco.com/c/en/us/support/docs/switches/catalyst-6500-series-switches/24330-185.html
When discussing about the dtp default mode, dtp default mode depends on the switch series. Cisco doc says " The default DTP configuration for Cisco Catalyst 2960 and 3560 switches is dynamic auto"
Another cisco doc says about catalyst 6500 series "Cisco recommends an explicit trunk mode configuration of dynamic desirable at both ends. This mode is the default mode"
So which one among the options could we select as the most appropriate answer?