LLDP
LLDP (Link Layer Discovery Protocol) is a standard tool that network devices use to tell each other about themselves - like neighbors introducing themselves. Think of it as a business card exchange between network devices, where they share information about their capabilities and identity. Network administrators use LLDP to map out networks, troubleshoot connection issues, and make sure devices are properly configured. It's similar to CDP (Cisco Discovery Protocol), but LLDP works with equipment from any manufacturer, not just Cisco devices.
Examples in Resumes
Implemented LLDP monitoring across multiple data centers to improve network visibility
Used LLDP for automated network documentation and mapping
Configured and managed network devices using LLDP for topology discovery
Typical job title: "Network Engineers"
Also try searching for:
Where to Find Network Engineers
Online Communities
Professional Networks
Example Interview Questions
Senior Level Questions
Q: How would you implement LLDP in a large enterprise network with multiple vendors?
Expected Answer: A senior engineer should explain how to plan LLDP deployment across different device brands, monitoring strategies, and how to use LLDP data for network management and troubleshooting.
Q: How does LLDP help in network automation?
Expected Answer: Should discuss how LLDP information can be used in automated network mapping, configuration management, and troubleshooting scripts.
Mid Level Questions
Q: What are the key differences between LLDP and CDP?
Expected Answer: Should explain that LLDP is an open standard working with all vendors while CDP is Cisco-proprietary, and discuss basic features of both protocols.
Q: How do you use LLDP for network troubleshooting?
Expected Answer: Should describe how LLDP helps identify connection issues, verify proper device connections, and assist in documenting network topology.
Junior Level Questions
Q: What basic information does LLDP provide?
Expected Answer: Should list basic information like device names, port numbers, system capabilities, and management addresses that LLDP shares between devices.
Q: How do you enable and verify LLDP on a network device?
Expected Answer: Should be able to explain basic LLDP configuration commands and how to check if LLDP is working properly between devices.
Experience Level Indicators
Junior (0-2 years)
- Basic LLDP configuration
- Network documentation
- Basic troubleshooting
- Understanding of network protocols
Mid (2-5 years)
- LLDP implementation across different vendors
- Network monitoring and management
- Advanced troubleshooting
- Network automation basics
Senior (5+ years)
- Enterprise-wide LLDP deployment
- Network automation using LLDP
- Cross-platform integration
- Network architecture design
Red Flags to Watch For
- No understanding of basic network protocols
- Cannot explain the difference between LLDP and CDP
- Lack of hands-on experience with network equipment
- No knowledge of network monitoring tools
Related Terms
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