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Cisco Certified Network Associate (CCNA) · Cisco
Select 2 answers.
This question asks for 2 answers, but our data marks only 1. Compare with the community discussion below for the full answer.
Written by other learners. Comments can disagree with the marked answer — check the official documentation when in doubt.
Cisco Discovery Protocol (CDP) operates at Layer 2 and shares information about directly connected Cisco devices, especially related to interfaces and link configuration.
Therefore, the two most technically accurate answers are A and E. Option Communicated by CDP? Reason A. the native VLAN YES CDP advertisements include the native VLAN ID of the link. C. the VTP domain NO Exchanged via separate VTP messages, not CDP. E. the spanning-tree protocol YES CDP communicates the specific STP version in use (e.g., PVST+).
The information contained in Cisco Discovery Protocol advertisements varies based on the type of device and the installed version of the operating system. Some of the information that Cisco Discovery Protocol can learn includes: Cisco IOS version running on Cisco devices Hardware platform of devices IP addresses of interfaces on devices Locally connected devices advertising Cisco Discovery Protocol Interfaces active on Cisco devices, including encapsulation type Hostname Duplex setting VLAN Trunking Protocol (VTP) domain Native VLAN