Cisco Discovery Protocol (CDP): Commands and Examples
Discover directly connected Cisco devices, map interfaces and inspect detailed neighbor data.
Read guideThe network engineer's field kit
Fast, focused tools turn symptoms into evidence. Practical labs and guides help you understand what to do next.
Essential instruments
Purpose-built utilities for the checks engineers make every day—from IP planning to trust validation.
Explore the full toolkitA better troubleshooting loop
Netest connects quick checks with the knowledge behind them, so each result becomes a skill you can reuse.
Capture the address, route, response, record or certificate state.
Use clear references to see what the output proves—and what it does not.
Recreate the behavior in a focused protocol lab or knowledge test.
Learning paths
Fresh from the field
Discover directly connected Cisco devices, map interfaces and inspect detailed neighbor data.
Read guideLearn IEEE 802.1AB LLDP, TLV fields, Cisco configuration, verification and LLDP-MED.
Read guideFollow an IPsec tunnel from IKE negotiation to protected traffic with clear diagrams.
Read guideReady for the next signal?
Plan an address, inspect a service, trace a path or sharpen your protocol skills.