200-301 · Question #187
What are two reasons a network administrator would use CDP? (Choose two.)
The correct answer is D. to verify Layer 2 connectivity between two devices when Layer 3 fails E. to obtain the IP address of a connected device in order to telnet to the device. Network administrators use CDP to discover information about directly connected Cisco devices, facilitating troubleshooting Layer 2 connectivity and identifying IP addresses for remote access.
Question
What are two reasons a network administrator would use CDP? (Choose two.)
Options
- Ato verify the type of cable interconnecting two devices
- Bto determine the status of network services on a remote device
- Cto obtain VLAN information from directly connected switches
- Dto verify Layer 2 connectivity between two devices when Layer 3 fails
- Eto obtain the IP address of a connected device in order to telnet to the device
- Fto determine the status of the routing protocols between directly connected routers
How the community answered
(65 responses)- A3% (2)
- B14% (9)
- C6% (4)
- D75% (49)
- F2% (1)
Why each option
Network administrators use CDP to discover information about directly connected Cisco devices, facilitating troubleshooting Layer 2 connectivity and identifying IP addresses for remote access.
CDP does not provide information about the specific type of cable (e.g., straight-through, crossover, fiber type) used to interconnect devices.
CDP provides device identity, capability, and port information, but it does not detail the operational status of network services running on a remote device.
While CDP provides switchport information, it does not typically provide detailed VLAN configuration specific to individual VLANs on directly connected switches.
If Layer 3 connectivity (IP routing) fails, CDP can still operate at Layer 2 to verify that a physical connection exists and that the devices are exchanging CDP advertisements, confirming basic Layer 2 reachability.
CDP provides information about directly connected devices, including their IP addresses, which can be useful for a network administrator to identify and then remotely connect (e.g., via Telnet or SSH) to the discovered device for further configuration or troubleshooting.
CDP is a discovery protocol for device information, not a tool for determining the operational status of routing protocols running between devices; that requires specific routing protocol commands.
Concept tested: Uses and capabilities of Cisco Discovery Protocol (CDP)
Source: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/cdp/configuration/xe-3s/cdp-xe-3s-book/nm-cdp-cfg-xe.html
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