Cisco Certified Internetwork Expert (CCIE) Practice Test

Which Cisco ISE profiler service probe can collect information about Cisco Discovery Protocol?

1. SNMP Query

2. DHCP SPAN

3. DHCP

4. HTTP

The correct answer is: SNMP Query

The Cisco ISE profiler service probe that can collect information about Cisco Discovery Protocol (CDP) is SNMP Query. CDP is a Layer 2 protocol used to share information about network devices. The SNMP (Simple Network Management Protocol) Query can be utilized to request this specific information from the devices in the network, as CDP runs on Cisco devices, and their information can be extracted via SNMP traffic. The SNMP Query sends requests to devices to gather various operational data, including the CDP information that shows how devices connect with one another. Other options, while relevant in different contexts, do not specifically collect CDP information. For instance, DHCP (Dynamic Host Configuration Protocol) primarily deals with IP address assignment and does not inherently provide details related to CDP. The DHCP SPAN (Switched Port Analyzer) is useful for monitoring traffic, but it won't directly facilitate CDP information gathering. HTTP is a protocol for transferring data over the web and is not utilized for collecting device-specific network protocols such as CDP. Hence, the use of the SNMP Query is most appropriate for this particular task within the context of profiling network devices and understanding their interconnectivity through CDP.