Which two statements about CDP are true? (Choose two.)
A. It can be disabled only at the interface level.
B. Devices with Cisco Discovery Protocol configured send advertisement messages to a multicast address on a periodic basis
C. It is disabled when switches have mismatched native VLANs
D. Devices with Cisco Discovery Protocol configured send advertisement messages to a broadcast address on a periodic basis.
E. VTP relies on Cisco Discovery Protocol to carry VTP domain information
https://www.cisco.com/c/en/us/support/docs/network-management/discovery-protocol-cdp/118736-technote-cdp-00.html
The router receives an untagged CDP packet:
The router does not have VLAN1 configured and none of the subinterfaces is configured with the native keyword.
The router receives the CDP packets on the main interface, but sends them over the subinterface where the native keyword is configured.
https://www.cisco.com/c/en/us/td/docs/optical/cpt/r9_5/command/reference/cpt95_cr/cpt95_cr_chapter_01101.html
Examples
The following example shows how to enable CDP on the TenGigabitEthernet4/1 interface, when CDP is disabled globally.
Router(config)# no cdp run
Router(config)# end
Agree with Sofia, E should be the correct answer as there is a VTP mgmt domain TLV for CDP.
vtp-mgmt-domain
Specifies the name of the VLAN Trunking Protocol (VTP) management domain for a device running the VTP on the particular interface on which the Cisco Discovery Protocol packet is sent.
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/cdp/configuration/15-mt/cdp-15-mt-book/nm-cdp-secure-cdp.html
C is not correct answer. CDP is not disabled when switches have mismatched native vlans. “E” looks correct