Module 8
Knowing What Is Actually Plugged In
Documentation goes stale; a discovery protocol cannot. Read the real topology off the devices, then fix routing that was written from the wrong one.
2 activities~34 min
In this module
- Explain what a discovery protocol advertises and why it never crosses a router
- Compare LLDP with CDP
- Derive a topology from a neighbour table
- Say why discovery belongs off at an untrusted edge
Activities
Lesson
Asking the network what it is plugged into
LLDP, CDP, and what a neighbour table does and does not prove.
9 min
Lab
The patch panel labels are wrong
Routes written from labels that stopped being true. The neighbour table settles it in one command.
25 min
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Curriculum topics
Each topic page lists every lesson, quiz and hands-on lab that covers it, plus how it maps onto the CCNA and Network+ blueprints.