CompTIA Network+ Practice Test

What is the function of CDP in networking?

1. To manage network configurations

2. To advertise and discover connected devices

3. To analyze traffic patterns across networks

4. To encrypt data transfers

The correct answer is: To advertise and discover connected devices

CDP, or Cisco Discovery Protocol, serves the primary function of advertising and discovering connected devices in a network. It allows network devices, particularly those manufactured by Cisco, to share information about themselves with neighboring devices. This includes details such as device identifiers, IP addresses, device capabilities, and the interface the device is connected to. The utility of CDP in network management is substantial, as it enables network administrators to visualize the network topology, troubleshoot connectivity issues, and configure network devices more effectively. By broadcasting its information periodically, a device can receive data about other devices in the vicinity, ensuring that the network maintains an updated knowledge base of its structure. The other options do not accurately describe the role of CDP. While some might relate to different network management functions, they do not encompass the primary purpose of CDP, which centers around the advertisement and discovery of devices. For example, managing network configurations is typically handled through other protocols or tools, analyzing traffic patterns generally falls under different network analysis methodologies, and encrypting data transfers involves security protocols rather than device discovery.